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This chapter describes the function and displays the syntax of each interface command. For more information about defaults and usage guidelines, see the corresponding chapter of the Configuration Fundamentals Command Reference.
Use the access-list global configuration command to establish MAC address access lists. Use the no form of this command to remove a single access list entry.
access-list access-list-number {permit | deny} address mask| access-list-number | Integer from 700 to 799 that you select for the list. |
| permit | Permits the frame. |
| deny | Denies the frame. |
| address mask | 48-bit MAC addresses written in dotted triplet form. The ones bits in the mask argument are the bits to be ignored in address. |
Use the access-list global configuration command to build type-code access lists. Use the no form of this command to remove a single access list entry.
access-list access-list-number {permit | deny} type-code wild-mask| access-list-number | User-selectable number between 200 and 299 that identifies the list. |
| permit | Permits the frame. |
| deny | Denies the frame. |
| type-code | 16-bit hexadecimal number written with a leading "0x"; for example, 0x6000. You can specify either an Ethernet type code for Ethernet-encapsulated packets, or a DSAP/SSAP pair for 802.3 or 802.5-encapsulated packets. Ethernet type codes are listed in the appendix "Ethernet Type Codes." |
| wild-mask | 16-bit hexadecimal number whose ones bits correspond to bits in the type-code argument that should be ignored when making a comparison. (A mask for a DSAP/SSAP pair should always be at least 0x0101. This is because these two bits are used for purposes other than identifying the SAP codes.) |
The peer default ip address command replaces the async default ip address command. Refer to the description of the peer default ip address command for more information.
To enable the router to pass routing updates to other routers over the AUX port configured as an asynchronous interface, use the async default routing interface configuration command.
async default routingTo specify an address on an asynchronous interface (rather than using the default address), use the async dynamic address interface configuration command. Use the no form of this command to disable dynamic addressing.
async dynamic addressTo enable manually configured routing on an asynchronous interface, use the async dynamic routing interface configuration command. Use the no form of this command to disable routing protocols; static routing is still used.
async dynamic routingTo place a line into network mode using SLIP or PPP encapsulation, use the async mode dedicated interface configuration command. Use the no form of this command to return the line to interactive mode.
async mode dedicatedTo enable the use of slip and ppp EXEC commands, use the async mode interactive line configuration command. Use the no form of this command to prevent users from enabling SLIP and PPP at the EXEC level.
async mode interactiveTo enable automatic receiver polarity reversal on a hub port connected to an Ethernet interface of a Cisco 2505 or Cisco 2507, use the auto-polarity hub configuration command. To disable this feature, use the no form of this command.
auto-polarityTo define how much time should elapse before a secondary line is set up or taken down after a primary line transition, use the backup delay interface configuration command. Use the no form of this command to remove the definition.
backup delay {enable-delay | never} {disable-delay | never}| enable-delay | Integer that specifies the delay in seconds after the primary line goes down before the secondary line is activated. |
| disable-delay | Integer that specifies the delay in seconds after the primary line goes up before the secondary line is deactivated. |
| never | Prevents the secondary line from being activated or deactivated. |
To configure the serial interface as a secondary, or dial backup line, use the backup interface serial interface configuration command. Use the no form of this command to turn disable this feature.
backup interface serial number| number | Number of the serial port to be set as the secondary, or dial backup, interface line. |
| slot | On the Cisco 7000 series and 7200 series, specifies the slot number. |
| port | On the Cisco 7000 series and 7200 series, specifies the port number. |
To set the traffic load thresholds for dial backup service, use the backup load interface configuration command. Use the no form of this command to remove the setting.
backup load {enable-threshold | never} {disable-load | never}| enable-threshold | Integer that specifies a percentage of the primary line's available bandwidth. |
| never | Specifies that the secondary line never be activated due to load. |
| disable-load | Integer that specifies a percentage of the primary line's available bandwidth. |
| never | Specifies that the secondary line never be deactivated due to load. |
To set a bandwidth value for an interface, use the bandwidth interface configuration command. Use the no form of this command to restore the default values.
bandwidth kilobits| kilobits | Intended bandwidth in kilobits per second. For a full bandwidth DS3, enter the value 44736. |
To increase the pulse of a signal at the receiver and decrease the pulse from the transmitter using pulse equalization and line build-out for a T1 cable on a Cisco AS5200, use the cablelength controller configuration command. To return the pulse equalization and line build-out values to their default settings, use the no form of this command.
cablelength long dbgain-value dbloss-value| long | Specifies a long cable length for channel service unit (CSU) connections. |
| dbgain-value | Number of decibels by which the receiver signal is increased. Use the keyword gain26 or gain36 to specify this value. Default is gain36. |
| dbloss-value | Number of decibels by which the receiver signal is decreased. Use one of the following keywords to specify this value:
Default is 0db. |
To configure channelized T1 timeslots with channel-associated signaling (also known as robbed-bit signaling), which enables an AS5200 modem to answer and send an analog call, use the cas-group controller configuration command. Use the no form of this command to disable channel-associated signaling for one or more timeslots.
cas-group channel-group [timeslots range]| channel-number | Channel group number; the value can be between 0 and 23. |
| timeslots range | (Optional) Specifies a range of timeslot values from 1 to 24. The default value configures all 24 timeslots with the channel associated signal called E&M (Ear and Mouth), which is the default signal type. |
Use the channel-group controller configuration command to define the timeslots that belong to each T1 or E1 circuit.
channel-group number timeslots range [speed {48 | 56 | 64}]| number | Channel-group number. When configuring a T1 data line, channel-group numbers can be values from 0 to 23. When configuring an E1 data line, channel-group numbers can be a values from 0 to 30. |
| timeslots range | Timeslot or range of timeslots belonging to the channel group. The first timeslot is numbered 1. For a T1 controller, the timeslot range is from 1 to 24. For an E1 controller, the timeslot range is from 1 to 31. |
| speed {48 | 56 | 64} | (Optional) Specifies the line speed (in kilobits per second) of the T1 or E1 link. The default line speed for T1 is 56 kbps. The default line speed for E1 is 64 kbps. |
| slot | Backplane slot number; can be 0, 1, 2, 3, or 4. The slots are numbered from left to right. |
| port | Port number of the interface. It can be 0 or 1 depending on the type of controller, as follows:
Ports on each interface processor are numbered from the top down. |
| number | Network interface module (NIM) number, in the range 0 through 2. |
To reboot the LAN Extender chassis and restart its operating software, use the clear controller lex privileged EXEC command.
clear controller lex number [prom]| number | Number of the LAN Extender interface corresponding to the LAN Extender to be rebooted. |
| prom | (Optional) Forces a reload of the PROM image, regardless of any Flash image. |
| slot | On the Cisco 7000 series, specifies the backplane slot number. On the Cisco 7000, the value can be 0, 1, 2, 3, or 4. On the Cisco 7010, the value can be 0, 1, or 2. |
| port | On the Cisco 7000 series, specifies the port number of the interface. The value can be 0, 1, 2, or 3 for the serial interface. |
To clear the interface counters, use the clear counters EXEC command.
clear counters [type number]| type | (Optional) Specifies the interface type. |
| number | (Optional) Specifies the interface counter displayed with the show interfaces command. |
| ethernet | (Optional) If the type is lex, you can clear the interface counters on the Ethernet interface. |
| serial | (Optional) If the type is lex, you can clear the interface counters on the serial interface. |
| slot | (Optional) Backplane slot number on the Cisco 7000 series and Cisco 7200 series. On the Cisco 7000 series and Cisco 7200 series, the value can be 0, 1, 2, 3, or 4. On the Cisco 7010, the value can be 0, 1, or 2. |
| port | (Optional) Port number of the interface. On the Cisco 7000 series and Cisco 7200 series, the value can be 0, 1, 2, or 3 for the serial interface. For the Cisco 7500 if the interface type is posi, the value must be 0. For the VIP card, the port value can be the following:
· 0 for one-port Fast Ethernet interfaces · 0, 1, 2, or 3 for four-port Ethernet interfaces · 0, 1, 2, or 3 for four-port serial interfaces · 0, 1, 2, or 3 for four-port Token Ring interfaces · 0 for one-port FDDI interfaces |
| port-adapter | (Optional) On the Cisco 7000 series and 7500 series, specifies the ports on a VIP card. The value can be 0 or 1. |
To reset and reinitialize the hub hardware connected to an interface of a Cisco 2505 or Cisco 2507, use the clear hub ethernet EXEC command.
clear hub ethernet number| ethernet | Indicates the hub in front of an Ethernet interface. |
| number | Hub number to clear, starting with 0. Since there is currently only one hub, this number is 0. |
To set to zero the hub counters on an interface of a Cisco 2505 or Cisco 2507, use the clear hub counters EXEC command.
clear hub counters [ether number [port [end-port]]]| ether | (Optional) Indicates the hub in front of an Ethernet interface. |
| number | (Optional) Hub number for which to clear counters. Since there is currently only one hub, this number is 0. If you specify the keyword ether, you must specify the number. |
| port | (Optional) Port number on the hub. On the Cisco 2505, port numbers range from 1 through 8. On the Cisco 2507, port numbers range from 1 through 16. If a second port number follows, then this port number indicates the beginning of a port range. If you do not specify a port number, counters for all ports are cleared. |
| end-port | (Optional) Ending port number of a range. |
To reset the hardware logic on an interface, use the clear interface EXEC command.
clear interface type number| type | Specifies the interface type. |
| number | Specifies the port, connector, or interface card number. |
| slot | On the Cisco 7000 series and Cisco 7200 series, specifies the backplane slot number. On the 7000 series, value can be 0, 1, 2, 3, or 4. On the 7010, value can be 0, 1, or 2. On the Cisco 7200 series, value can be 0, 1, 2, 3, 4, 5, or 6. |
| port | Port number of the interface. For the Cisco 7500 if the interface type is posi, the value must be 0. On the Cisco 7000 series, this argument is required, and the value can be 0, 1, 2, 3, 4 or 5 depending on the type of interface, as follows:
(Optional) Port number of the interface. For the VIP card this argument is optional, and the value can be the following: · 0 for one-port Fast Ethernet interfaces · 0, 1, 2, or 3 for four-port Ethernet interfaces · 0, 1, 2, or 3 for four-port serial interfaces · 0, 1, 2, or 3 for four-port Token Ring interfaces · 0 for one-port FDDI interfaces |
| port-adapter | (Optional) On the Cisco 7000 and Cisco 7500 series, specifies the ports on a VIP card. The value can be 0 or 1. |
| :channel-group | (Optional) On the Cisco 7000 series supporting channelized T1, specifies the channel from 0 to 23. A colon must precede the channel number. |
To reset the controller for a specified Fast Ethernet interface, use the clear interface fastethernet privileged EXEC command.
clear interface fastethernet number (Cisco 4500 series)| number | Port, connector, or interface card number. On a Cisco 4500 series router, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system. |
| slot | On the Cisco 7000 series, slot location of the FEIP. On the Cisco 7200, slot 0 is the Fast Ethernet port on the I/O controller. |
| port | On the Cisco 7000 series, port number on the interface. |
| port-adapter | On the Cisco 7000 and 7500 series, specifies the port bay on a VIP card. The value can be 0 or 1. |
To return a line to its idle state, use the clear line privileged EXEC command at the system prompt.
clear line line-number| line-number | Asynchronous line port number assigned with the interface async command. |
To clear entries from the Routing Information Field (RIF) cache, use the clear rif-cache EXEC command.
clear rif-cacheTo reset the integrated CSU/DSU on a Cisco 2524 or Cisco 2525 router, use the clear service-module serial privileged EXEC configuration command.
clear service-module serial number| number | Number of the serial interface. |
To configure the clock rate for the hardware connections on the serial interface appliques, network interface modules (NIMs), and interface processors to an acceptable bit rate, use the clock rate interface configuration command. Use the no clock rate command to remove the clock rate if you change the interface from a DCE to a DTE device.
clock rate bps| bps | Desired clock rate in bits per second: 1200, 2400, 4800, 9600, 19200, 38400, 56000, 64000, 72000, 125000, 148000, 500000, 800000, 1000000, 1300000, 2000000, or 4000000. |
To select the clock source for the time-division multiplexing (TDM) bus in a Cisco AS5200 access server, use the clock source interface configuration command. The no form of this command configures the clock source to its default setting.
clock source {line {primary | secondary} | internal}| line | Clock source on the active line. |
| primary | Primary TDM clock source. |
| secondary | Secondary TDM clock source. |
| internal | Selects the free running clock (also known as internal clock) as the clock source. |
| line | Specifies the T1 line as the clock source. |
| internal | Specifies the MIP (Cisco 7000 series, Cisco 7200 series, and Cisco 7500 series) or the NPM (Cisco 4000) as the clock source. |
To control which clock a G.703 E1 interface will use to clock its transmitted data from, use the clock source interface configuration command. The no form of this command restores the default value.
clock source {line | internal}| line | Specifies that the interface will clock its transmitted data from a clock recovered from the line's receive data stream (default). |
| internal | Specifies that the interface will clock its transmitted data from its internal clock. |
To start the processes that perform the connection management (CMT) function and allow the ring on one fiber to be started, use the cmt connect EXEC command.
cmt connect [interface-name [phy-a | phy-b]]| interface-name | (Optional) Specifies the FDDI interface. |
| phy-a | (Optional) Selects Physical Sublayer A. |
| phy-b | (Optional) Selects Physical Sublayer B. |
To stop the processes that perform the connection management (CMT) function and allow the ring on one fiber to be stopped, use the cmt disconnect EXEC command.
cmt disconnect [interface-name [phy-a | phy-b]]| interface-name | (Optional) Specifies the FDDI interface. |
| phy-a | (Optional) Selects Physical Sublayer A. |
| phy-b | (Optional) Selects Physical Sublayer B. |
To configure software compression for Link Access Procedure, Balanced (LAPB) and High-Level Data Link Control (HDLC) encapsulations, use the compress interface configuration command. To disable compression, use the no form of this command.
compress [predictor | stac]| predictor | (Optional) Specifies that a predictor compression algorithm will be used. |
| stac | (Optional) Specifies that a Stacker (LZS) compression algorithm will be used. |
To configure a T1 or E1 controller and enter controller configuration mode, use the controller global configuration command.
controller [t1 | e1] slot/port (on the Cisco 7000 and the Cisco 7500 series)| t1 | T1 controller. |
| e1 | E1 controller. |
| slot |
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port | Port number of the interface. It can be 0 or 1 for the MIP (MultiChannel Interface Processor). Ports on each interface processor are numbered from the top down. |
| number | Network interface module (NIM) number, in the range 0 through 2. |
To download an executable image from Flash memory on the core router to the LAN Extender chassis, use the copy flash lex privileged EXEC command.
copy flash lex number| number | Number of the LAN Extender interface to which to download an image from Flash memory. |
To download an executable image from a TFTP server to the LAN Extender, use the copy tftp lex privileged EXEC command.
copy tftp lex number| number | Number of the LAN Extender interface to which to download an image. |
To set the length of the cyclic redundancy check (CRC) on a Fast Serial Interface Processor (FSIP) or HSSI Interface Processor (HIP) of the Cisco 7000 series and Cisco 7500 series only or on a 4-port serial adapter of the Cisco 7200 series, use the crc interface configuration command. To set the CRC length to 16 bits, use the no form of this command.
crc size| size | CRC size (16 or 32 bits). |
To enable generation of the G.703 E1 CRC4, use the crc4 interface configuration command. To disable this feature, use the no form of this command.
crc4When running the line at high speeds and long distances, use the dce-terminal-timing enable interface configuration command to prevent phase shifting of the data with respect to the clock. If SCTE is not available from the DTE, use no form of this command, which causes the DCE to use its own clock instead of SCTE from the DTE.
dce-terminal-timing enableTo set a delay value for an interface, use the delay interface configuration command. Use the no form of this command to restore the default delay value.
delay tens-of-microseconds| tens-of-microseconds | Integer that specifies the delay in tens of microseconds for an interface or network segment. |
To add a description to an E1 or T1 controller on a Cisco 7000 series and Cisco 7500 series router, use the description controller configuration command. Use the no form of this command to remove the description.
description string| string | Comment or a description to help you remember what is attached to the controller. |
To add a description to an interface configuration, use the description interface configuration command. Use the no form of this command to remove the description.
description string| string | Comment or a description to help you remember what is attached to this interface. |
To configure an interface to inform the system it is down when loopback is detected, use the down-when-looped interface configuration command.
down-when-loopedOn the Cisco 4000 series, you can specify the serial Network Processor Module timing signal configuration. When the board is operating as a DTE, the dte-invert-txc command inverts the TXC clock signal it gets from the DCE that the DTE uses to transmit data. Use the no form of this command if the DCE accepts SCTE from the DTE.
dte-invert-txcTo enable early token release on Token Ring interfaces, use the early-token-release interface configuration command. Once enabled, use the no form of this command to disable this feature.
early-token-releaseTo set the encapsulation method used by the interface, use the encapsulation interface configuration command.
encapsulation encapsulation-type| encapsulation-type | Encapsulation type; one of the following keywords:
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Use the encapsulation atm-dxi interface configuration command to enable ATM-DXI encapsulation. The no form of this command disables ATM-DXI.
encapsulation atm-dxiTo set the LAPB encapsulation method used by the interface, use the encapsulation lapb interface configuration command.
encapsulation lapb [dte | dce] [multi | protocol]| dte | (Optional) DDN X.25 DTE operation (for serial interface). |
| dce | (Optional) DDN X.25 DCE operation (for serial interface). |
| multi | (Optional) Multiprotocol support. |
| protocol | (Optional) Protocol type. Use any of the keywords in the following list: apollo--Apollo domain appletalk--AppleTalk clns--ISO CLNS decnet--DECnet ip--IP ipx--Novell IPX multi--Multiprotocol operation qllc--QLLC protocol snapshot--Snapshot routing support vines--Banyan VINES xns--Xerox Network Services |
To specify an serial interface's operation as an X.25 device, use the encapsulation x25 interface configuration command.
encapsulation x25 [dte | dce] [ddn | bfe | ietf]| dte | (Optional) Specifies operation as a DTE. This is the default X.25 mode. |
| dce | (Optional) Specifies operation as a DCE. |
| ddn | (Optional) Specifies DDN encapsulation on an interface using DDN X.25 standard service |
| bfe | (Optional) Specifies BFE encapsulation on an interface attached to a Blacker Front End device. Available for BFE operation only. |
| ietf | (Optional) Specifies that the interface's datagram encapsulation should default to use of the IETF standard method, as defined by RFC 1356. |
To set the mechanism that protects against packet overload and resulting recount errors on the MCI interface cards, use the error-threshold interface configuration command.
error-threshold milliseconds| milliseconds | Frequency at which the error recount will be set in milliseconds. Default is 1000 ms. |
To allow the FCI card to preallocate buffers to handle bursty FDDI traffic (for example, NFS bursty traffic), use the fddi burst-count interface configuration command. Use the no form of this command to revert to the default value.
fddi burst-count number| number | Number of preallocated buffers in the range from 1 to 10. Default is 3 buffers. |
To set the C-Min timer on the PCM, use the fddi c-min interface configuration command. Use the no form of this command to revert to the default value.
fddi c-min microseconds| microseconds | Sets the timer value in microseconds. Default is 1600 microseconds. |
To control the information transmitted during the connection management (CMT) signaling phase, use the fddi cmt-signal-bits interface configuration command.
fddi cmt-signal-bits signal-bits [phy-a | phy-b]| signal-bits | A hexadecimal number preceded by 0x; for example, 0x208. The FDDI standard defines ten bits of signaling information that must be transmitted, as follows:
· bit 0--Escape bit. Reserved for future assignment by the FDDI standards committee. · bits 1 and 2--Physical type. · bit 3--Physical compatibility. Set if topology rules include the connection of a physical-to-physical type at the end of the connection. · bits 4 and 5--Link Confidence test duration. · bit 6--Media Access Control (MAC) available for link confidence test. · bit 7--Link confidence test failed. The setting of bit 7 indicates that the link confidence was failed by the Cisco end of the connection. · bit 8--MAC for local loop. · bit 9--MAC on physical output. |
| phy-a | (Optional) Selects Physical Sublayer A. |
| phy-b | (Optional) Selects Physical Sublayer B. |
To turn on the duplicate address detection capability on the FDDI, use the fddi duplicate-address-check interface configuration command. Use the no form of this command to disable this feature.
fddi duplicate-address-checkTo specify encapsulating bridge mode on the CSC-C2/FCIT interface card, use the fddi encapsulate interface configuration command. Use the no form of this command to turn off encapsulation bridging and return the FCIT interface to its translational, nonencapsulating mode.
fddi encapsulateTo enable the SMT frame processing capability on the FDDI, use the fddi smt-frames interface configuration command. Use the no form of this command to disable this feature and prevent the Cisco IOS software from generating or responding to SMT frames.
fddi smt-framesTo set the TB-Min timer in the physical connection management (PCM), use the fddi tb-min interface configuration command. Use the no form of this command to revert to the default value.
fddi tb-min milliseconds| milliseconds | Sets the TB-Min timer value in milliseconds. |
To control the TL-Min time (the minimum time to transmit a Physical Sublayer, or PHY line state, before advancing to the next physical connection management (PCM) state, as defined by the X3T9.5 specification), use the fddi tl-min-time interface configuration command.
fddi tl-min-time microseconds| microseconds | Integer that specifies the time used during the connection management (CMT) phase to ensure that signals are maintained for at least the value of TL-Min so the remote station can acquire the signal. |
To control ring scheduling during normal operation and to detect and recover from serious ring error situations, use the fddi token-rotation-time interface configuration command.
fddi token-rotation-time microseconds| microseconds | Integer that specifies the token rotation time (TRT). |
To set the t-out timer in the physical connection management (PCM), use the fddi t-out interface configuration command. Use the no form of this command to revert to the default value.
fddi t-out milliseconds| milliseconds | Sets the timeout timer. |
To recover from a transient ring error, use the fddi valid-transmission-time interface configuration command.
fddi valid-transmission-time microseconds| microseconds | Integer that specifies the transmission valid timer (TVX) interval. |
To set the facilities data-link exchange standard for the CSU on the T1 controllers on the Cisco AS5200, enter the fdl controller configuration command. To disable facilities data-link support, use the no form of this command.
fdl {att | ansi}| att | Selects AT&T technical reference 54016 for Extended Super Frame facilities data-link exchange support. |
| ansi | Selects ANSI T1.403 for Extended Super Frame facilities data-link exchange support. |
Use the framing controller configuration command to select the frame type for the T1 or E1 data line.
framing {sf | esf} (for T1 lines)| sf | Specifies Super Frame as the T1 frame type. |
| esf | Specifies Extended Super Frame as the T1 frame type. |
| crc4 | Specifies CRC4 frame as the E1 frame type. |
| no-crc4 | Specifies no CRC4 frame as the E1 frame type. |
| australia | (Optional) Specifies the E1 frame type used in Australia. |
To create a list of member asynchronous interfaces (associated with a group interface), use the group-range command. Use the no form of the command to remove an interface from the member list.
group-range low-end-of-range high-end-of-range| low-end-of-range | The beginning interface number to be made a member of the group interface. |
| high-end-of-range | The ending interface number to be made a member of the group interface. |
| interface | The interface number to add to the group. |
Use the half-duplex interface configuration command to configure an SDLC interface for half-duplex mode. Use the no form of this command to reset the interface for full-duplex mode.
half-duplexTo place a low-speed serial interface in controlled-carrier mode, instead of constant-carrier mode, use the half-duplex controlled-carrier interface configuration command. Use the no form of this command to return the interface to constant-carrier mode.
half-duplex controlled-carrierTo specify the hold-queue limit of an interface, use the hold-queue interface configuration command. Use the no form of this command with the appropriate keyword to restore the default values for an interface.
hold-queue length {in | out}| length | Integer that specifies the maximum number of packets in the queue. |
| in | Specifies the input queue. |
| out | Specifies the output queue. |
To allow the router to support a CSU/DSU that uses the LC signal to request a loopback from the router, use the hssi external-loop-request interface configuration command. Use the no form of this command to disable the feature.
hssi external-loop-requestTo convert the HSSI interface into a 45 MHz clock master, use the hssi internal-clock interface configuration command. Use the no form of this command to disable the clock master mode.
hssi internal-clockTo enable and configure a port on an Ethernet hub of a Cisco 2505 or Cisco 2507, use the hub global configuration command.
hub ethernet number port [end-port]| ethernet | Indicates that the hub is in front of an Ethernet interface. |
| number | Hub number, starting with 0. Since there is currently only one hub, this number is 0. |
| port | Port number on the hub. On the Cisco 2505, port numbers range from 1 through 8. On the Cisco 2507, port numbers range from 1 through 16. If a second port number follows, then the first port number indicates the beginning of a port range. |
| end-port | (Optional) Last port number of a range. |
Use the ignore-dcd interface configuration command to configure the serial interface to monitor the DSR signal (instead of the DCD signal) as the line up/down indicator. Use the no form of this command to restore the default behavior.
ignore-dcdTo configure an interface type and enter interface configuration mode, use the interface global configuration command.
interface type numberTo configure a subinterface, use the interface global configuration command.
interface type slot/port-adapter/port.subinterface-number {multipoint | point-to-point} (for ports on VIP cards in the Cisco 7000 and the 7500 series routers)| type | Type of interface to be configured. |
| number | Port, connector, or interface card number. On a Cisco 4000 series router, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system, and can be displayed with the show interfaces command. |
| slot | On the Cisco 7000 series and Cisco 7200 series, specifies the backplane slot number. On the 7000, value can be 0, 1, 2, 3, or 4. On the Cisco 7010, value can be 0, 1, or 2. The slots are numbered from left to right. On the Cisco 7505, the slot number can be 0. 1, 2, or 3 from bottom to top. On the Cisco 7507, the slot number can be 0 and 1 (CyBus0) and 4 through 6 (Cybus1), from left to right. On the Cisco 7513, the slot numbers are 0 through 5 (CyBus 0) and 8 through 12 (CyBus 1), from left to right. |
| port | Port number on the interface. On the Cisco 7000 series and Cisco 7200 series this argument is required, and the value can be 0, 1, 2, 3, 4, 5, 6, or 7 depending on the type of interface, as follows:
· AIP (ATM Interface Processor) 0 · EIP (Ethernet Interface Processor) 0, 1, 2, 3, 4, or 5 · FEIP (Fast Ethernet Interface Processor) 0, 1 · FIP (FDDI Interface Processor) 0 · FSIP (Fast Serial Interface Processor) 0, 1, 2, 3, 4, 5, 6, or 7 · HIP (HSSI Interface Processor) 0 · MIP (MultiChannel Interface Processor) 0 or 1 · TRIP (Token Ring Interface Processor) 0, 1, 2, or 3 On the Cisco 7000 series and 7200 series, ports on each interface processor are numbered from the top down. (Optional) Port number of the interface. For the VIP card this argument is optional, and the value can be the following: · 0 for one-port Fast Ethernet interfaces · 0, 1, 2, or 3 for four-port Ethernet interfaces · 0, 1, 2, or 3 for four-port serial interfaces · 0, 1, 2, or 3 for four-port Token Ring interfaces · 0 for one-port FDDI interfaces |
| port-adapter | (Optional) On the Cisco 7000 and Cisco 7500 series, specifies the ports on a VIP card. The value can be 0 or 1. |
| :channel-group | On the Cisco 4000 series or Cisco 7000 series, specifies the T1 channel group number in the range of 0 to 23 defined with the channel-group controller configuration command. A colon must precede the channel number. On a dual port card, it is possible to run channelized on one port and primary rate on the other port. |
| .subinterface-number | Subinterface number in the range 1 to 4294967293. The number that precedes the period (.) must match the number this subinterface belongs to. |
| multipoint | point-to-point | Specifies a multipoint or point-to-point subinterface. There is no default. |
To designate a dialer rotary group leader, use the interface dialer global configuration command.
interface dialer interface-number| interface-number | Integer in the range 0 to 9 that you select to indicate a dialer rotary group. |
To select a particular Fast Ethernet interface for configuration, use the interface fastethernet global configuration command.
interface fastethernet number (Cisco 4500 series and Cisco 4700 series)| number | Port, connector, or interface card number. On a Cisco 4500 or Cisco 4700 router, specifies the NIM or NPM number. The numbers are assigned at the factory at the time of installation or when added to a system. |
| slot | On the Cisco 7000 series, slot location of the FEIP. On the Cisco 7200, slot 0 is the Fast Ethernet port on the I/O controller. |
| port | On the Cisco 7000 series, port number on the interface. |
| port-adapter | On the Cisco 7000 and 7500 series, specifies the port bay on a VIP card. The value can be 0 or 1. |
To create a group interface that will serve as master, to which asynchronous interfaces can be associated as members, use the interface group-async command. Use the no form of the command to restore the default.
interface group-async number| number | Number of the asynchronous group interface being created. |
Delays between the SCTE clock and data transmission indicate that the transmit clock signal might not be appropriate for the interface rate and length of cable being used. Different ends of the wire may have variances that differ slightly. To invert the clock signal to compensate for these factors, use the invert-transmit-clock interface configuration command. This command applies only to the Cisco 7000 series and Cisco 7500 series. To return to the transmit clock signal to its initial state, use the no form of this command.
invert-transmit-clockTo enable an address pooling mechanism used to supply IP addresses to dial-in asynchronous, synchronous, or ISDN point-to-point interfaces, use the ip address-pool global configuration command. To disable IP address pooling globally on all interfaces with the default configuration, use the no form of the command.
ip address-pool [dhcp-proxy-client | local]| dhcp-proxy-client | (Optional) Uses the router as the proxy-client between a third-party Dynamic Host Configuration Protocol (DHCP) server and peers connecting to the router. |
| local | (Optional) Use the local address pool named default. |
To specify which Dynamic Host Configuration Protocol (DHCP) servers to use on your network, specify the IP address of one or more DHCP servers available on the network, use the ip dhcp-server global configuration command. Use the no form of the command to remove a DHCP server's IP address.
ip dhcp-server [ip-address | name]| ip-address | (Optional) IP address of a DHCP server. |
| name | (Optional) Name of a DHCP server. |
To configure a local pool of IP addresses to be used when a remote peer connects to a point-to-point interface, use the ip local pool global configuration command. To delete an address pool, use the no form of this command.
ip local pool {default | pool-name low-ip-address [high-ip-address]}| default | Default local address pool that is used if no other pool is named. |
| pool-name | Name of a specific local address pool. |
| low-ip-address | Lowest IP address in the pool. |
| high-ip-address | (Optional) Highest IP address in the pool. If this value is omitted only the low-ip-address IP address is included in the local pool. The maximum number of IP addresses per pool is 256. |
To enable incoming ISDN voice calls to access the AS5200 call switch module and integrated modems, use the isdn incoming-voice modem interface configuration command. The no form of this command stops all incoming ISDN analog calls from routing to the modems.
isdn incoming-voice modemTo set the keepalive timer for a specific interface, use the keepalive interface configuration command. To turn off keepalives entirely, use the no form of this command.
keepalive [seconds]| seconds | (Optional) Unsigned integer value greater than 0. The default is 10 seconds. |
To set the burned-in MAC address for a LAN Extender interface, use the lex burned-in-address interface configuration command. To clear the burned-in MAC address, use the no form of this command.
lex burned-in-address ieee-address| ieee-address | 48-bit IEEE MAC address written as a dotted triplet of four-digit hexadecimal numbers. |
To assign an access list that filters on MAC addresses, use the lex input-address-list interface configuration command. To remove an access list from the interface, use the no form of this command.
lex input-address-list access-list-number| access-list-number | Number of the access list you assigned with the access-list global configuration command. It can be a number from 700 to 799. |
To assign an access list that filters Ethernet packets by type code, use the lex input-type-list interface configuration command. To remove an access list from the interface, use the no form of this command.
lex input-type-list access-list-number| access-list-number | Number of the access list you assigned with the access-list global configuration command. It can be a number in the range 200 to 299. |
To activate priority output queuing on the LAN Extender, use the lex priority-group interface configuration command. To disable priority output queuing, use the no form of this command.
lex priority-group group| group | Number of the priority group. It can be a number in the range 1 to 10. |
To define the number of times to resend commands to the LAN Extender chassis, use the lex retry-count interface configuration command. To return to the default value, use the no form of this command.
lex retry-count number| number | Number of times to retry sending commands to the LAN Extender. It can be a number in the range 0 to 100. The default is 10 times. |
To define the amount of time to wait for a response from the LAN Extender, use the lex timeout interface configuration command. To return to the default time, use the no form of this command.
lex timeout milliseconds| milliseconds | Time, in milliseconds, to wait for a response from the LAN Extender before resending the command. It can be a number in the range 500 to 60000. The default is 2000 milliseconds (2 seconds). |
Use the linecode controller configuration command to select the line-code type for the T1 or E1 line.
| ami | Specifies alternate mark inversion (AMI) as the line-code type. Valid for T1 or E1 controllers; the default for T1 lines. |
| b8zs | Specifies B8ZS as the line-code type. Valid for T1 controller only. |
| hdb3 | Specifies high-density bipolar 3 (hdb3) as the line-code type. Valid for E1 controller only; the default for E1 lines. |
To reenable the link-test function on a port on an Ethernet hub of a Cisco 2505 or Cisco 2507, use the link-test hub configuration command. Use the no form of this command to disable this feature if a pre-10BaseT twisted-pair device not implementing link test is connected to the hub port.
link-testTo enable Lanoptics Hub Networking Management of a PCbus Token Ring interface, use the local-lnm interface configuration command. Use the no form of this command to disable Lanoptics Hub Networking Management.
local-lnmTo loop an entire E1 line (including all channel-groups defined on the controller) toward the line and back toward the router or access server, use the loopback controller configuration command. To remove the loop, use the no form of this command.
loopbackTo diagnose equipment malfunctions between interface and device, use the loopback interface configuration command. The no loopback command disables the test.
loopbackTo configure an internal loop on the HSSI applique, use the loopback interface configuration command. To remove the loop, use the no form of this command.
loopback appliqueTo loop packets back to the DTE from the CSU/DSU on devices that support this feature, use the loopback interface configuration command. To remove the loop, use the no form of this command.
loopback dteTo loop packets completely through the CSU/DSU to configure the CSU loop, when the device supports this feature, use the loopback line interface configuration command. To remove the loop, use the no form of this command.
loopback line [payload]| payload | (Optional) Configures a loopback point at the DSU and loops back data to the network on an integrated CSU/DSU for a Cisco 2524 and Cisco 2525. |
To loop a channelized T1 or channelized E1 channel-group, use the loopback local interface configuration command. To remove the loop, use the no form of this command.
loopback localTo loop an entire T1 line (including all channel-groups defined on the controller) toward the line and the router or access server, use the loopback local controller configuration command. To remove the loop, use the no form of this command.
loopback localTo loop packets through a CSU/DSU, over a DS-3 link or a channelized T1 link, to the remote CSU/DSU and back, use the loopback remote interface configuration command. To remove the loop, use the no form of this command.
loopback remote| full | Transmits a full-bandwidth line loopback request to a remote device, which is used for testing the line and remote CSU. |
| payload | Transmits a payload line loopback request to a remote device, which is used for testing the line and remote DSU. |
| smart-jack | Transmits a loopback request to the remote smart-jack, which some service providers attach on the line before the customer premises equipment (CPE). You cannot put the local smart-jack into loopback. |
| 0in1 | (Optional) Transmits an all-zeros test pattern used for verifying B8ZS line encoding. The remote end my report a loss of signal when using alternate mark inversion (AMI) line coding. |
| 1in1 | (Optional) Transmits an all-ones test pattern used for signal power measurements. |
| 1in2 | (Optional) Transmits an alternating ones and zeroes test pattern used for testing bridge taps. |
| 1in5 | (Optional) Transmits the industry standard test-pattern loopback request. |
| 1in8 | (Optional) Transmits a test pattern used for stressing timing recovery of repeaters. |
| 3in24 | (Optional) Transmits a test pattern used for testing the ones density tolerance on AMI lines. |
| qrw | (Optional) Transmits a quasi-random word test pattern, which is a random signal that simulates user data. |
| user-pattern value | (Optional) Transmits a test pattern that you define. Enter a binary string up to 24 bits long. For the fixed patterns such 0in1 and 1in1, the T1 framing bits are jammed on top of the test pattern; for the user-pattern, the pattern is simply repeated in the timeslots. |
| 2047 | (Optional) Transmits a pseudo-random test pattern that repeats after 2047 bits. |
| 511 | (Optional) Transmits a pseudo-random test pattern that repeats after 511 bits. |
| stress-pattern pattern-number | (Optional) Transmits a DDS stress pattern available only on the 4-wire 56/64-kbps CSU/DSU module. You may enter a stress pattern from 1 to 4. A 1 pattern sends 100 bytes of all 1s and then 100 bytes of all 0s to test the stress clocking of the network. A 2 pattern sends 100 bytes of a 0x7e pattern and then 100 bytes of all 0s. A 3 pattern sends continuous bytes of a 0x46 pattern. A 4 pattern sends continuous bytes of a 0x02 pattern. |
To loop packets from a MIP through the CSU/DSU, over a dedicated T1 link, to the remote CSU at the single destination for this T1 link and back, use the loopback remote controller configuration command. To remove the loop, use the no form of this command.
loopback remoteTo specify the physical connection for one of the following configurations, use the media type command:
Use the no form of this command to restore the default value.
media-type {aui | 10baset | 100baset | mii}| aui | Selects a 15-pin physical connection. |
| 10baset | Selects an RJ45 10BaseT physical connection. |
| 100baset | Specifies an RJ45 100BaseT physical connection. |
| mii | Specifies a media-independent interface. |
To alter the configuration of an asynchronous interface that is a member of a group, use the member interface configuration command. Use the no form of the command to restore defaults set at the group master interface.
member number interface-command| number | Number of the asynchronous interface to be altered. |
| interface-command | One or more commands entered for this specific interface. Valid commands are the following:
· peer default ip address · description |
To enable an interface to support the Maintenance Operation Protocol (MOP), use the mop enabled interface configuration command. To disable MOP on an interface, use the no mop enabled command.
mop enabledTo enable an interface to send out periodic Maintenance Operation Protocol (MOP) system identification messages, use the mop sysid interface configuration command. To disable MOP message support on an interface, use the no form of this command.
mop sysidTo adjust the maximum packet size or maximum transmission unit (MTU) size, use the mtu interface configuration command. Use the no form of this command to restore the MTU value to its original default value.
mtu bytes| bytes | Desired size in bytes. |
To enable non-return to zero inverted (NRZI) line coding format, use the nrzi-encoding interface configuration command. Use the no form of this command to disable this capability.
nrzi-encodingUse the peer default ip address interface configuration command to specify an IP address, an address from a specific IP address pool, or an address from the DHCP mechanism to be returned to a remote peer connecting to this interface. Use the no form of the command to disable a prior peer IP address pooling configuration on an interface.
peer default ip address {ip-address | dhcp | pool [pool-name]}| ip-address | Specific IP address to be assigned to a remote peer dialing in to the interface. To prevent duplicate IP addresses from being assigned on more than one interface, this command argument cannot be applied to a dialer rotary group nor to an ISDN interface. |
| dhcp | Retrieve an IP address from the DHCP server. |
| pool | Use the Global Default Mechanism as defined by the ip address-pool command unless the optional pool-name argument is supplied. This is the default. |
| pool-name | (Optional) Name of a local address pool created using the ip local pool command. Retrieve an address from this pool regardless of the Global Default Mechanism setting. |
To specify the mode of a slow-speed serial interface on a router as either synchronous or asynchronous, use the physical-layer interface configuration command. Use the no form of this command to return the interface to its default mode, which is synchronous.
physical-layer {sync | async}| sync | Place the interface in synchronous mode. |
| async | Place the interface in asynchronous mode. |
To enable pulsing DTR signal intervals on the serial interfaces, use the pulse-time interface configuration command. Use the no form of this command to restore the default interval.
pulse-time seconds| seconds | Integer that specifies the DTR signal interval in seconds. Default is 0 seconds. |
To set the ring speed for the CSC-1R and CSC-2R Token Ring interfaces, use the ring-speed interface configuration command.
ring-speed speed| speed | Integer that specifies the ring speed, either 4 for 4-Mbps or 16 for 16-Mbps operation. |
To configure the network line speed for a 4-wire 56/64-kbps CSU/DSU module, use the service-module 56k clock rate interface configuration command. Use the no form of this command to enable a network line speed of 56 kbps.
service-module 56k clock rate line-speed| line-speed | Network line speed in kbps; one of the following keywords 2.4, 4.8, 9.6, 19.2, 38.4, 56, 64, and auto. Default is 56 kbps. |
To configure the clock source for the 4-wire 56/64-kbps CSU/DSU module, use the service-module 56k clock source interface configuration command. Use the no form of this command to enable the line clock.
service-module 56k clock source {line | internal}| line | Uses the clocking provided by the active line. This is the default. |
| internal | Uses internal clocking provided by the module. |
To prevent application data from replicating loopback codes when operating at 64 kbps on a 4-wire CSU/DSU, use the service-module 56k data-coding interface configuration command. Use the no form of this command to enable normal transmission.
service-module 56k data-coding {normal | scrambled}| normal | Specifies normal transmission of data. This is the default. |
| scrambled | Scrambles bit codes or user data before transmission. All control codes such as out of service and out of frame are avoided. |
To transmit packets in switched dial-up mode or digital data service (DDS) mode using the 4-wire 56/64-kbps CSU/DSU module, use the service-module 56k network-type interface configuration command. Use the no form of this command to transmit from a dedicated leased line in DDS mode.
service-module 56k network-type {dds | switched}| dds | Transmits packets in DDS mode or through a dedicated leased line. Default for the 4-wire CSU/DSU. |
| switched | Transmits packets in switched dial-up mode, which is the only setting on the 2-wire switched 56-kbps CSU/DSU module. Default for 2-wire CSU/DSU. |
To enable the acceptance of a remote loopback request on a 2- or 4-wire 56/64-kbps CSU/DSU module, use the service-module 56k remote-loopback interface configuration command. Use the no form of this command to disable the module from entering loopback.
service-module 56k remote-loopbackTo select a service provider to use with a 2- or 4-wire 56/64 kbps dial-up line, use the service-module 56k switched-carrier interface configuration command. Use the no form of this command to enable the default service provider.
service-module 56k switched-carrier {att | sprint | other}| att | AT&T or other digital network service provider. Default for the 4-wire 56/64-kbps CSU/DSU module. |
| sprint | Sprint or other service provider whose network requires echo cancelers. Default for the 2-wire switched 56-kbps CSU/DSU module. |
| other | Service provider besides AT&T or Sprint. |
To specify the clock source for the fractional T1/T1 CSU/DSU module installed in a Cisco 2524 or Cisco 2525 router, use the service-module t1 clock source interface configuration command. Use the no form of this command to enable the line clock.
service-module t1 clock source {internal | line}| internal | Specifies the CSU/DSU internal clock. |
| line | Specifies the line clock. This is the default. |
To guarantee the ones density requirement on an AMI line using the fractional T1/T1 module, use the service-module t1 data-coding inverted interface configuration command. Use the no form of this command to enable normal data transmission.
service-module t1 data-coding {inverted | normal}| inverted | Inverts bit codes by changing all 1 bits into 0 bits and all 0 bits into 1 bits. |
| normal | Requests that no bit codes be inverted before transmission. This is the default. |
To select the frame type for a line using the fractional T1/T1 (FT1/T1) module from a Cisco 2524 or Cisco 2525 router, use the service-module t1 framing interface configuration command. Use the no form of this command to select the default, which is Extended Super Frame as the T1 frame type.
service-module t1 framing {esf | sf}| esf | Specifies Extended Super Frame as the T1 frame type. This is the default. |
| sf | Specifies D4 Super Frame as the T1 frame type. |
To configure the CSU line build out (LBO) on a fractional T1/T1 CSU/DSU module, use the service-module t1 lbo interface configuration command. Use the no form of this command to disable line build out.
service-module t1 lbo {-15 db | -7.5 db | none}| -15 db | Decreases outgoing signal strength by 15 dB. |
| -7.5 db | Decreases outgoing signal strength by 7.5 dB. |
| none | Transmits packets without decreasing outgoing signal strength. This is the default. |
To select the line code for the fractional T1/T1 module installed on a Cisco 2524 or Cisco 2525 router, use the service-module t1 linecode interface configuration command. Use the no form of this command to select the default, which is the B8ZS line code.
service-module t1 linecode {ami | b8zs}| ami | Specifies alternate mark inversion (AMI) as the line code. |
| b8zs | Specifies binary 8 zero substitution (B8ZS) as the line code. This is the default. |
To generate remote alarms (yellow alarms) at the local CSU/DSU or detect remote alarms sent from the remote CSU/DSU, use the service-module t1 remote-alarm-enable interface configuration command. Use the no form of this command to disable remote alarms.
service-module t1 remote-alarm-enableTo specify if the fractional T1/T1 CSU/DSU module enters loopback mode when it receives a loopback code on the line, use the service-module t1 remote-loopback interface configuration command. Use the no form of this command to disable remote loopbacks.
service-module t1 remote-loopback {full | payload} [alternate | v54]| full | Configures the remote loopback code used to transmit or accept CSU loopback requests. |
| payload | Configures the loopback code used by the local CSU/DSU to generate or detect payload-loopback commands. |
| alternate | (Optional) Transmits a remote CSU/DSU loopback request using a 4-in-5 pattern for loopup and 2-in-3 pattern for loopdown. This is an inverted version of the standard loopcode request. |
| v54 | (Optional) Industry standard loopback code. Use this configuration for CSU/DSUs that may not support the Accunet loopup standards. This keyword is used only with a payload request, not a full request. |
To define timeslots that constitute a fractional T1/T1 (FT1/T1) channel in a Cisco 2524 or Cisco 2525 router, use the service-module t1 timeslots interface configuration command. Use the no form of this command to resume the default setting (all FT1/T1 timeslots transmit at 64 kbps).
service-module t1 timeslots {range | all} [speed {56 | 64}]| range | The DS0 timeslots that constitute the FT1/T1 channel. The range is from 1 to 24, where the first timeslot is numbered 1 and the last timeslot is numbered 24. Specify this field by using a series of subranges separated by commas. |
| all | Selects all FT1/T1 timeslots. |
| speed | (Optional) Specifies the timeslot speed. |
| 56 | 56 kbps. |
| 64 | 64 kbps. This is the default for all timeslots. |
To display the status of the asynchronous interfaces (which on routers is interface 1, the auxiliary port), use the show async status user EXEC command:
show async statusTo display compression statistics, use the show compress EXEC command.
show compressUse the show controllers async EXEC command to display information about interface hardware, registers, and random access memory on the Cisco 1005 router.
show controllers async number| Number of the asynchronous interface. |
To display all information under the cBus controller card, use the show controllers cbus privileged EXEC command on the Cisco 7000, Cisco RSP/7000, Cisco 7500, or Cisco 7513 routers. This command also shows the capabilities of the card and reports controller-related failures.
show controllers cbusUse the show controllers e1 privileged EXEC command on the Cisco 4000, Cisco 7000, and Cisco 7500 series to display information about the E1 links supported by the Network Processor Module (NPM) (Cisco 4000) or MultiChannel Interface Processor (MIP) (Cisco 7000 series and Cisco 7500 series).
show controllers e1 [slot/port]| slot | (Optional) Specifies the backplane slot number and can be 0, 1, 2, 3, or 4. |
| port | (Optional) Specifies the port number of the controller and can be 0 or 1. |
Use the show controllers ethernet EXEC command to display information on the Cisco 2500 series, Cisco3000, or Cisco 4000 series.
show controllers ethernet number| number | Interface number of the Ethernet interface. |
To display information about initialization block information, transmit ring, receive ring and errors for the Fast Ethernet controller chip on the Cisco 4500 series, Cisco 7000 series, Cisco 7200 series, or Cisco 7500 series, use the show controllers fastethernet EXEC command.
show controllers fastethernet number Cisco 4500 series| number | Port, connector, or interface card number. On a Cisco 4500 or Cisco 4700 router, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system. |
| slot | On the Cisco 7000 series, slot location of the FEIP. On the Cisco 7200, slot 0 is the Fast Ethernet port on the I/O controller. |
| port | On the Cisco 7000 series, port number on the interface. |
| port-adapter | On the Cisco 7000 and Cisco 7500 series, port bay on a VIP card. The value can be 0 or 1. |
To display all information under the FDDI Interface Processor (FIP) on the Cisco 7000 series, Cisco 7200 series, and Cisco 7500 series, use the show controllers fddi user EXEC command.
show controllers fddiTo show hardware and software information about the LAN Extender chassis, use the show controllers lex EXEC command.
show controllers lex [number]| number | (Optional) Number of the LAN Extender interface about which to display information. |
| slot | (Optional) Specifies the backplane slot number on the Cisco 7000 series, and can be 0, 1, 2, 3, or 4. |
| port | (Optional) Specifies the port number of the controller and can be 0 or 1. |
Use the show controllers mci privileged EXEC command to display all information under the Multiport Communications Interface card or the SCI.
show controllers mciTo display all information about the ISA bus interface, use the show controllers pcbus privileged EXEC command.
show controllers pcbusUse the show controllers serial privileged EXEC command to display information that is specific to the interface hardware.
show controllers serialUse the show controllers t1 privileged EXEC command on the Cisco 4000 series, Cisco 7000 series and Cisco 7500 series to display information about the T1 links supported by the Network Processor Module (NPM) (Cisco 4000) or the Multichannel Interface Processor (MIP) (Cisco 7000).
show controllers t1 [slot/port]| slot | (Optional) Specifies the backplane slot number and can be 0, 1, 2, 3, or 4. |
| port | (Optional) Specifies the port number of the controller and can be 0 or 1. |
To display information about memory management and error counters on the Token Ring Interface Processor (TRIP) for the Cisco 7000 series and Cisco 7500 series, use the show controllers token privileged EXEC command.
show controllers tokenTo display the current DHCP settings on point-to-point interfaces, use the show dhcp privileged EXEC command.
show dhcp {server | lease [interface async [number]]}| server | Show known DHCP servers. |
| lease | Show DHCP addresses leased from a server. |
| interface async [number] | (Optional) Specify asynchronous interfaces and, optionally, a specific interface number. |
To display diagnostic information about the controller, interface processor, and port adapters associated with a specified slot of a Cisco 7000 series, Cisco 7200 series, or Cisco 7500 series router, use the show diagbus privileged EXEC command.
show diagbus [slot]| slot | (Optional) Number of a specific slot. If not specified, this command displays information about all slots. |
To display information about the hub (repeater) on an Ethernet interface of a Cisco 2505 or Cisco 2507, use the show hub EXEC command.
show hub [ethernet number [port [end-port]]]| ethernet | (Optional) Indicates that this is an Ethernet hub. |
| number | (Optional) Hub number, starting with 0. Since there is currently only one hub, this number is 0. |
| port | (Optional) Port number on the hub. On the Cisco 2505, port numbers range from 1 through 8. On the Cisco 2507, port numbers range from 1 through 16. If a second port number follows, then this port number indicates the beginning of a port range. |
| end-port | (Optional) Ending port number of a range. |
| type | (Optional) Interface type. Allowed values for type include async, bri0, ethernet, fastethernet, fddi, hssi, loopback, null, serial, tokenring, and tunnel.
For the Cisco 4000 series, type can be e1, ethernet, fastethernet, fddi, serial, t1, and token. For the Cisco 4500 series, type can also include atm. For the Cisco 7000 family, type can be atm, e1, ethernet, fastethernet, fddi, serial, t1, and tokenring. For the Cisco 7500 series or the Cisco RSP/7000, type can also include posi. |
| number | (Optional) Port number on the selected interface. |
| first last | (Optional) For the Cisco 2500 and 3000 ISDN Basic Rate Interface (BRI) only. The argument first can be either 1 or 2. The argument last can only be 2, indicating B-channels 1 and 2.
D-channel information is obtained by using the command without the optional arguments. |
| accounting | (Optional) Displays the number of packets of each protocol type that has been sent through the interface. |
| slot | (Optional) Specifies the backplane slot number and can be 0, 1, 2, 3, or 4. For the Cisco 7200, the slot number can be 0, 1, 2, 3, 4, 5, or 6; slot 0 is the Fast Ethernet port on the Cisco 7200 I/O controller, and slots 1 through 6 are chassis slot numbers. |
| port | (Optional) Port number of the interface. On the Cisco 7200, the number of ports depends on the type of port adapter installed. On the Cisco 7000 series and Cisco 7200 series, the values depend on the type of interface, as follows:
· AIP (ATM Interface Processor): 0 · EIP (Ethernet Interface Processor): 0, 1, 2, 3, 4, or 5 · FEIP (Fast Ethernet Interface Processor): 0, 1 · FIP (FDDI Interface Processor): 0 · FSIP (Fast Serial Interface Processor): 0, 1, 2, 3, 4, 5, 6, or 7 · HIP (HSSI Interface Processor): 0 · MIP (Multichannel Interface Processor): 0 or 1 · TRIP (Token Ring Interface Processor): 0, 1, 2, or 3 (Optional) Port number of the interface. For the VIP card this argument is optional, and the value can be the following: · 1-port Fast Ethernet interfaces: 0 · 4-port Ethernet interfaces: 0, 1, 2, or 3 · 4-port serial interfaces: 0, 1, 2, or 3 · 4-port Token Ring interfaces: 0, 1, 2, or 3 · 1-port FDDI interfaces: 0 On the Cisco 7500 series with a Packet over SONET Interface Processor, the value must be 0. |
| port-adapter | (Optional) On the Cisco 7000 and Cisco 7500 series, specifies a port adapter on a VIP or VIP2 card. The value can be 0 or 1. |
Use the show interfaces async privileged EXEC command to display information about the serial interface.
show interfaces async [number] [accounting]| number | (Optional) Must be 1. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
Use the show interfaces atm privileged EXEC command to display information about the ATM interface.
show interfaces atm [slot/port]| slot | (Optional) Slot number. On the Cisco 7000, values can be 0, 1, 2, 3, or 4; on the Cisco 7010, values can be 0, 1, or 2. |
| port | (Optional) Port number; the value must be 0. |
Use the show interfaces ethernet privileged EXEC command to display information about an Ethernet interface on the router.
show interfaces ethernet unit [accounting]| unit | Must match a port number on the selected interface. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
| slot | (Optional) On the Cisco 7000 series, slot location of the interface processor. |
| port | (Optional) Port number on the interface. For the VIP card the port value can be the following:
· 0 for one-port Fast Ethernet interfaces · 0, 1, 2, or 3 for four-port Ethernet interfaces |
| port-adapter | (Optional) On the Cisco 7000 and 7500 series, specifies the ports on a VIP card. The value can be 0 or 1. |
To display information about the FastEthernet interfaces, use the show interface fastethernet EXEC command.
show interfaces fastethernet [number] (Cisco 4500 series and Cisco 4700 series)| number | (Optional) Port, connector, or interface card number. On a Cisco 4500 or Cisco 4700 router, specifies the NIM or NPM number. The numbers are assigned at the factory at the time of installation or when added to a system. |
| slot | (Optional) On the Cisco 7000 series, slot location of the FEIP. On the Cisco 7200, slot 0 is the Fast Ethernet port on the I/O controller. |
| port | (Optional) On the Cisco 7000 family, port number on the interface. |
| port-adapter | (Optional) On the Cisco 7000 and Cisco 7500 series, port bay on a VIP card. The value can be 0 or 1. |
Use the show interfaces fddi EXEC command to display information about the FDDI interface.
show interfaces fddi number [accounting]| number | Port number on the selected interface. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
| slot | (Optional) On the Cisco 7000 and 7500 series, slot location of the interface processor. |
| port | (Optional) On the Cisco 7000 and 7500 series, port number on interface. |
Use the show interfaces hssi privileged EXEC command to display information about the HSSI interface.
show interfaces hssi unit [accounting]| unit | Must match a port number on the selected interface. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
| slot | (Optional) On the Cisco 7000 series, slot location of the interface processor. |
| port | (Optional) On the Cisco 7000 series, port number on interface. |
To display a brief summary of an IP interface's information and status, use the show interfaces ip-brief EXEC command.
show interfaces ip-briefTo display statistics about a LAN Extender interface, use the show interface lex EXEC command.
show interfaces lex number [ethernet | serial]| number | Number of the LAN Extender interface that resides on the core router about which to display statistics. |
| ethernet | (Optional) Displays statistics about the Ethernet interface that resides on the LAN Extender chassis. |
| serial | (Optional) Displays statistics about the serial interface that resides on the LAN Extender chassis. |
Use the show interfaces loopback privileged EXEC command to display information about the loopback interface.
show interfaces loopback [number] [accounting]| number | (Optional) Port number on the selected interface. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
Use the show interfaces serial privileged EXEC command to display information about a serial interface.
show interfaces serial [number] [accounting]| number | (Optional) Port number. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
| :channel-group | (Optional) On the Cisco 4000 with an NPM or Cisco 7000 series with a MIP, specifies the T1 channel group number in the range of 0 to 23 defined with the channel-group controller configuration command. Not supported on the Cisco 7200 series in Cisco IOS Release 11.2. |
| slot | (Optional) On the Cisco 7000 series, slot location of the interface processor. On the Cisco 7200 series, slot location of the port adapter. |
| port | (Optional) Port number on the interface. For the VIP card, the port value can be 0, 1, 2, or 3 for 4-port serial interfaces. On the Cisco 7200 series, the port numbers depend on the type of port adapters installed. |
| port-adapter | (Optional) On the Cisco 7000 and Cisco 7500 series, specifies the ports on a VIP card. The value can be 0 or 1. |
Use the show interfaces tokenring privileged EXEC command to display information about the Token Ring interface and the state of source route bridging.
show interfaces tokenring unit [accounting]| unit | Must match the interface port line number. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
| slot | On the Cisco 7000 series, slot location of the interface processor. On the 7000, value can be 0, 1, 2, 3, or 4. On the 7010, value can be 0, 1, or 2.
On the Cisco 7200 series, slot location of the port adapter; the value can be 1, 2, 3, 4, 5, or 6. |
| port | Port number on the interface. On the Cisco 7000 series this argument is required, and the values can be 0, 1, 2, or 3.
(Optional) For the VIP card this argument is optional, and the port value can be 0, 1, 2, or 3 for 4-port Token Ring interfaces. On the Cisco 7200 series, the number depends on the type of port adapter installed. |
| port-adapter | (Optional) On the Cisco 7000 and 7500 series, specifies the ports on a VIP card. The value can be 0 or 1. |
To list tunnel interface information, use the show interfaces tunnel privileged EXEC command.
show interfaces tunnel number [accounting]| number | Port line number. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
Use the show interfaces vty EXEC command to display information about virtual asynchronous interfaces.
| number | Number of the virtual terminal (VTY) that has been configured for asynchronous protocol features (vty-async). |
To list a summary of an interface's IP information and status, use the show ip interface privileged EXEC command.
show ip interface [brief] [type] [number]| brief | (Optional) Displays a brief summary of IP status and configuration. |
| type | (Optional) Specifies that information be displayed about that interface type only. The possible value depends on the type of interfaces the system has. For example, it could be ethernet, null, serial, tokenring, and so forth. |
| number | (Optional) Interface number. |
To display statistics for any defined IP address pools, use the show ip local pool command.
show ip local pool [name]| name | (Optional) Name of a specific IP address pool. |
Use the show rif EXEC command to display the current contents of the RIF cache.
show rifTo display the performance report for an integrated CSU/DSU in a Cisco 2524 or Cisco 2525, use the show service-module serial privileged EXEC command.
show service-module serial number [performance-statistics [interval-range]]| number | Interface number 0 or 1. |
| performance-statistics | (Optional) Displays the CSU/DSU performance statistics for the past 24 hours. This keyword applies only to the fractional T1/T1 module. |
| interval-range | (Optional) Specifies the number of 15-minute intervals displayed. You can choose a range from 1 to 96, where each value represents the CSU/DSU activity performed in that 15-minute interval. For example, a range of 2-3 displays the performance statistics for the intervals two and three. |
To display a snapshot of the time-division multiplexing (TDM) bus connection memory in a Cisco AS5200 access server, use the show tdm connections EXEC command.
show tdm connections [motherboard | slot number]| motherboard | (Optional) Motherboard in the Cisco AS5200 access server. |
| slot number | (Optional) Slot number. |
To display a snapshot of the time-division multiplexing (TDM) bus data memory in a Cisco AS5200 access server, use the show tdm data EXEC command.
show tdm data [motherboard | slot number]| motherboard | (Optional) Motherboard in the Cisco AS5200 access server. |
| slot number | (Optional) Slot number. |
To shut down a port on an Ethernet hub of a Cisco 2505 or Cisco 2507, use the shutdown hub configuration command. To restart the disabled hub, use the no form of this command.
shutdownTo disable an interface, use the shutdown interface configuration command. To restart a disabled interface, use the no form of this command.
shutdownTo set the maximum number of unprocessed FDDI station management (SMT) frames that will be held for processing, use the smt-queue-threshold global configuration command. Use the no form of this command to restore the queue to the default.
smt-queue-threshold number| number | Number of buffers used to store unprocessed SMT messages that are to be queued for processing. Acceptable values are positive integers. |
To issue an SNMP trap when a MAC address violation is detected on an Ethernet hub port of a Cisco 2505, Cisco 2507, or Cisco 2516 router, use the snmp trap illegal-address hub configuration command. Use the no form to disable this function.
snmp trap illegal-addressTo configure source address control on a port on an Ethernet hub of a Cisco 2505 or Cisco 2507, use the source-address hub configuration command. To remove a previously defined source address, use the no form of this command.
source-address [mac-address]| mac-address | (Optional) MAC address in the packets that the hub will allow to access the network. |
To extend the Ethernet twisted-pair 10BaseT capability beyond the standard 100 meters on the
Cisco 4000 platform, use the squelch interface configuration command. To restore the default, use the no form of this command.
| normal | Allows normal capability. |
| reduced | Allows extended 10BaseT capability. |
To test the Fast Ethernet interface by pinging itself, use the test interface fastethernet EXEC command.
test interface fastethernet number| number | Port, connector, or interface card number. On a Cisco 4500 or Cisco 4700 router, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system, and can be displayed with the show interfaces command. |
To perform self-tests on an integrated CSU/DSU installed in a Cisco 2524 or Cisco 2525 router, use the test service-module privileged EXEC command.
test service-module type number| type | Interface type. |
| number | Interface number. |
To enable framed mode on a G.703 E1 interface, use the timeslot interface configuration command. To restore the default, use the no form of this command or set the start slot to 0.
timeslot start-slot - stop-slot| start-slot | The first subframe in the major frame. Range is 1 to 31 and must be less than or equal to stop-slot. |
| stop-slot | The last subframe in the major frame. Range is 1 to 31 and must be greater than or equal to start-slot. |
When a DTE does not return a transmit clock, use the transmit-clock-internal interface command to enable the internally generated clock on a serial interface on a Cisco 7000 series, Cisco 7200 series, or Cisco 7500 series. Use the no form of this command to disable the feature.
transmit-clock-internalTo specify a minimum dead-time after transmitting a packet, use the transmitter-delay interface configuration command. The no form of this command restores the default.
transmitter-delay {delay}| delay | On the FSIP, HSSI, and on the IGS router, the minimum number of HDLC flags to be sent between successive packets. On all other serial interfaces and routers, approximate number of microseconds of minimum delay after transmitting a packet. The valid range is 0 to 131071. |
To control the use of time slot 16 for data on a G.703 E1 interface, use the ts16 interface configuration command. To restore the default, use the no form of this command.
ts16To enable encapsulator-to-decapsulator checksumming of packets on a tunnel interface, use the tunnel checksum interface configuration command. To disable checksumming, use the no form of this command.
tunnel checksumTo specify the destination for a tunnel interface, use the tunnel destination interface configuration command. To remove the destination, use the no form of this command.
tunnel destination {hostname | ip-address}| hostname | Name of the host destination |
| ip-address | IP address of the host destination expressed in decimal in four-part, dotted notation |
To enable an ID key for a tunnel interface, use the tunnel key interface configuration command. To remove the ID key, use the no form of this command.
tunnel key key-number| key-number | Integer from 0 to 4294967295 |
To set the encapsulation mode for the tunnel interface, use the tunnel mode interface configuration command. To set to the default, use the no form of this command.
tunnel mode {aurp | cayman | dvmrp | eon | gre ip | nos}| aurp | AppleTalk Update Routing Protocol (AURP). |
| cayman | Cayman TunnelTalk AppleTalk encapsulation. |
| dvmrp | Distance Vector Multicast Routing Protocol. |
| eon | EON compatible CLNS tunnel. |
| gre ip | Generic route encapsulation (GRE) protocol over IP. |
| nos | KA9Q/NOS compatible IP over IP. |
To configure a tunnel interface to drop datagrams that arrive out of order, use the tunnel sequence-datagrams interface configuration command. To disable this function, use the no form of this command.
tunnel sequence-datagramsTo set a tunnel interface's source address, use the tunnel source interface configuring command. To remove the source address, use the no form of this command.
tunnel source {ip-address | type number}| ip-address | IP address to use as the source address for packets in the tunnel. |
| type | Interface type. |
| number | Specifies the port, connector, or interface card number. The numbers are assigned at the factory at the time of installation or when added to a system, and can be displayed with the show interfaces command. |
To control the number of transmit buffers available to a specified interface on the MCI and SCI cards, use the tx-queue-limit interface configuration command.
tx-queue-limit number| number | Maximum number of transmit buffers that the specified interface can subscribe. |
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