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This section 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 Router Products Command Reference publication.
async default ip address ip-address
no async default ip address
To assign the interface address that is used by the device connecting to the router via PPP or SLIP, unless you override the address at the command line, use the async default ip address interface configuration command. Use the no form of the command to remove the address from your configuration.
| ip-address | Address of the client interface |
To 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.
To implement asynchronous routing on an interface, use the async dynamic routing interface configuration command. The no form of this command disables use of routing protocols; static routing will still be used.
async mode dedicated
no async mode
To place a line into network mode using SLIP or PPP encapsulation, use the async mode dedicated interface configuration command. The no form of this command returns the line to interactive mode.
async mode interactive
no async mode
To enable the slip and ppp EXEC commands, use the async mode interactive line configuration command. Use the no form of this command to prevent users from implementing SLIP and PPP at the EXEC level.
atm-dxi map protocol address vpi vci [broadcast]
no atm-dxi map protocol address
To map a given VPI and VCI to a Frame Relay DLCI, use the atm-dxi map interface configuration command. Use the no form of this command to remove the definition.
| protocol | Specifies the protocol: apollo, appletalk, bridge, clns, decnet, ip, ipx, vines, xns. |
| address | Protocol-specific address. |
| vpi | Specifies the Virtual Path Identifier in the range 0 to 15. |
| vci | Specifies the Virtual Circuit Identifier in the range 0 to 63. |
| broadcast | (Optional) Broadcasts should be forwarded to this address. |
[no] backup delay {enable-delay | never} {disable-delay | never}
To 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.
| 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. |
[no] backup interface interface-name
backup interface interface-name slot/port (for the Cisco 7000 series)
To configure the serial interface as a secondary, or dial backup line, use the backup interface interface configuration command. Use the no form of this command with the appropriate serial port designation to disable this feature.
| interface-name | Serial port to be set as the secondary interface line. |
| slot | On the Cisco 7000 series, specifies the slot number. |
| port | On the Cisco 7000 series, specifies the port number. |
[no] backup load {enable-threshold | never} {disable-load | never}
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.
| enable-threshold | Integer that specifies a percentage of the primary line's available bandwidth. |
| disable-load | Integer that specifies a percentage of the primary line's available bandwidth. |
| never | Sets the secondary line to never be activated due to load. |
bandwidth kilobits
no bandwidth
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.
| kilobits | Intended bandwidth in kilobits per second. For a full bandwidth DS3, enter the value 44736. |
channel-group number timeslots range [speed {48 | 56 | 64}]
Use the channel-group controller configuration command to define the timeslots that belong to each T1 circuit.
| number | Channel-group number. Channel-group numbers can be a value from 0 to 23. |
| timeslots range | Timeslot or range of timeslots belonging to the channel-group. The first timeslot is numbered 1; the last timeslot is numbered 24. |
| speed {48 | 56 | 64} | (Optional) Specifies the line speed (in kilobits per second) of the T1 link. The default is 56 kbps. |
Use the clear controller EXEC command to reset the T1 controller interface on the Cisco 7000 series.
| 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 or1 for the MIP (Multichannel Interface Processor). Ports on each interface processor are numbered from the top down. |
clear counters [type number]
clear counters [type slot/port] (for the Cisco 7000 series)
To clear the interface counters, use the clear counters EXEC command.
| type | (Optional) Specifies the interface type; it is one of the keywords listed in the clear interface type keywords table in the Router Products Command Reference publication. |
| number | (Optional) Specifies the interface counter displayed with the show interfaces command. |
| slot | (Optional) 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 | (Optional) 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. |
clear interface type number
clear interface type slot/port (for the Cisco 7000 series)
clear interface type slot/port [:channel-group] (on a Cisco 7000 series MIP T1 interface)
To reset the hardware logic on an interface, use the clear interface EXEC command.
| type | Specifies the interface type; it is one of the keywords listed in the clear interface type keywords table in the Router Products Command Reference publication. |
| number | Specifies the port, connector, or interface card number. |
| slot | Backplane slot number. In a Cisco 7000, it can be 0, 1, 2, 3, or 4. In a Cisco 7010, it can be 0, 1, or 2. |
| port | On a Cisco 7000 series, specifies the port number of the interface and can be 0, 1, 2, 3, 4 or 5 depending on the type of interface, as follows: AIP (ATM Interface Processor)--0 EIP (Ethernet Interface Processor)--0, 1, 2, 3, 4, or 5 FIP (FDDI Interface Processor)--0 HIP (HSSI Interface Processor)--0 TRIP (Token Ring Interface Processor)--0, 1, 2, or 3 |
| :channel-group | On the Cisco 7000 series supporting channelized T1, specifies the channel. It is a number in the range 0 to 23. |
To clear entries from the Routing Information Field (RIF) cache, use the clear rif-cache EXEC command.
clock source {line | internal}
Use the clock source controller configuration command to set the T1-line clock-source for the MIP in the Cisco 7000 series.
| line | Specifies the T1 line as the clock source. |
| internal | Specifies the MIP as the clock source. |
To configure the clock rate for appliques (connector hardware) on the serial interface of the MCI and SCI cards 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.
| bps | Desired clock rate in bits per second: 1200, 2400, 4800, 9600, 19200, 34800, 56000, 64000, 72000, 125000, 148000, 500000, 800000, 1000000, 1300000, 2000000, or 4000000. |
cmt connect [interface-name [phy-a | phy-b]]
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.
| interface-name | (Optional) Specifies the FDDI interface. |
| phy-a | (Optional) Selects Physical Sublayer A. |
| phy-b | (Optional) Selects Physical Sublayer B. |
cmt disconnect [interface-name [phy-a | phy-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.
| interface-name | (Optional) Specifies the FDDI interface |
| phy-a | (Optional) Selects Physical Sublayer A |
| phy-b | (Optional) Selects Physical Sublayer B |
[no] compress predictor
To configure point-to-point software compression for a LAPB or X.25 link, use the compress predictor interface configuration command. To disable compression, use the no form of this command.
To configure a T1 controller interface and enter controller configuration mode, use the controller t1 global configuration command. This command is used only on a Cisco 7000 series.
| slot | Backplane slot number. In the Cisco 7000, can be 0, 1, 2, 3, or 4. In the Cisco 7010, can be 0, 1, or 2. The slots are numbered from left to right. |
| 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. |
To set the length of the cyclic redundancy check (CRC) on a Fast Serial Interface Processor (FSIP) of the Cisco 7000 series, use the crc interface configuration command. To set the CRC length to 16 bits, use the no form of this command.
| size | CRC size (16 or 32 bits); the default is 16 bits. |
[no] dce-terminal-timing enable
When running a 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 the no form of this command, which causes the DCE to use its own clock instead of SCTE from the DTE.
delay tens-of-microseconds
no delay
To 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.
| tens-of-microseconds | Integer that specifies the delay in tens of microseconds for an interface or network segment. |
description string
no description
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.
| 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.
On the Cisco 4000 platform, you can specify the serial Network Interface 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.
To enable early token release, a method whereby the Token Ring interfaces can release the token back onto the ring immediately after transmitting rather than waiting for the frame to return, use the early-token-release interface configuration command. This feature helps to increase the total bandwidth of the Token Ring.
The CSC-C2CTR, CSC-R16 (or CSC-R16M),CSC-2R, and CSC-1R cards and the Token Ring Interface Processor (TRIP) on the Cisco 7000 all support early token release. Once enabled, use the no form of this command to disable this feature.
encapsulation encapsulation-type
To set the encapsulation method used by the interface, use the encapsulation interface configuration command.
| encapsulation-type | Encapsulation type. See the encapsulation types table in the Router Products Command Reference publication for a list of supported encapsulation types. |
encapsulation atm-dxi
Use the encapsulation atm-dxi interface configuration command to enable ATM-DXI encapsulation. The no encapsulation atm-dxi command disables ATM-DXI encapsulation.
fddi burst-count number
no fddi burst-count
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.
| number | Number of preallocated buffers. Valid values are in the range from 1 to 10; the default is 3 buffers. |
fddi c-min microseconds
no fddi c-min
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.
| microseconds | Sets the timer value in microseconds. |
fddi cmt-signal-bits signal-bits [phy-a | phy-b]
To control the information transmitted during the connection management (CMT) signaling phase, use the fddi cmt-signal-bits interface configuration command. If neither the phy-a nor phy-b keyword is specified, the signal bits apply to both physical connections.
| 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. |
| phy-a | (Optional) Selects Physical Sublayer A. |
| phy-b | (Optional) Selects Physical Sublayer B. |
[no] fddi duplicate-address-check
To enable 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.
To 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.
To enable the connection management (CMT) onboard functions on the CSC-FCI and CSC-C2/FCIT interface cards, use the fddi if-cmt interface configuration command. Use the no form of this command to disable these functions.
To 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, in which case the router will not generate or respond to SMT frames.
fddi t-out milliseconds
no fddi t-out
To set the timeout 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.
| milliseconds | Sets the timeout timer. The default is 100 milliseconds. |
fddi tb-min milliseconds
no fddi tb-min
To 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.
| milliseconds | Sets the TM-Min timer value in milliseconds. The default is 100 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.
| 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. The default is 30 microseconds. |
fddi token-rotation-time microseconds
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.
| microseconds | Integer that specifies the token rotation time (TRT). The default is 5000 microseconds. |
fddi valid-transmission-time microseconds
To recover from a transient ring error, use the fddi valid-transmission-time interface configuration command.
| microseconds | Integer that specifies the transmission valid timer (TVX) interval. The default is 2500 microseconds. |
Use the framing controller configuration command to select the frame type for the T1 line.
| sf | Specifies super frame as the T1 frame type. The default is sf. |
| esf | Specifies extended super frame as the T1 frame type. |
hold-queue length {in | out}
no hold-queue {in | out}
To 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.
| length | Integer that specifies the maximum number of packets in the queue. Default input hold-queue limit is 75 packets. Default output hold-queue limit is 40 packets. |
| in | Specifies the input queue. |
| out | Specifies the output queue. |
[no] hssi external-loop-request
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.
To 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.
interface type number
interface type slot/port (for the Cisco 7000 series)
interface type slot/port:channel-group
(for channelized T1 on the Cisco 7000 series)
interface type number.subinterface-number [multipoint |
point-to-point]
interface type slot/port.subinterface-number [multipoint |
point-to-point] (for the Cisco 7000 series)
To configure an interface or subinterface type and enter interface configuration mode, use the interface global configuration command.
| interface-type | Type of interface to be configured. See the interface type keywords table in the Router Products Command Reference publication. |
| interface-number | 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. |
| .subinterface-number | Subinterface number in the range 1 to 4294967293. The interface-number that precedes the period (.) must match the interface-number this subinterface belongs to. |
| multipoint | point-to-point | (Optional) Specifies a multipoint or point-to-point subinterface. The default is multipoint. |
| slot | On the Cisco 7000 series, specifies the backplane slot number; can be 0, 1, 2, 3, or 4 on the Cisco 7000. On the Cisco 7010, can be 0, 1, or 2. The slots are numbered from left to right. |
| port | On the Cisco 7000 series, specifies the port number of the interface. It can be 0, 1, 2, 3, 4, or 5 depending on the type of interface, as follows:
AIP (ATM Interface Processor)--0 EIP (Ethernet Interface Processor)--0, 1, 2, 3, 4, or 5 FIP (FDDI Interface Processor)--0 FSIP (Fast Serial Interface Processor)--0, 1, 2, or 3 HIP (HSSI Interface Processor)--0 TRIP (Token Ring Interface Processor)--0, 1, 2, or 3 Ports on each interface processor are numbered from the top down. |
| channel-group | On the Cisco 7000, specifies the T1 circuit number in the range of 0 to 23 defined with the channel-group controller configuration command. |
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 to the Cisco 7000 series.
To configure ISDN caller ID screening, use the isdn caller interface configuration command. To disable this feature, use the no form of this command.
| number | Telephone number for which to screen. Specify an x to represent a single "don't-care" character. The maximum length is 25 characters. |
[no] isdn spid1 spid-number [ldn]
Use the isdn spid1 interface configuration command to define at the router the SPID number that has been assigned by the ISDN service provider for the B1 channel. Use the no isdn spid1 command to disable the specified SPID, thereby preventing access to the switch. If you include the LDN in the no form of this command, the access to the switch is permitted, but the other B channel might not be able to receive incoming calls.
| spid-number | Number identifying the service to which you have subscribed. This value is assigned by the ISDN service provider and is usually a ten-digit telephone number with some extra digits. |
| ldn | (Optional) Local directory number. This is a seven-digit number also assigned by the service provider. |
[no] isdn spid2 spid-number [ldn]
Use the isdn spid2 interface configuration command to define at the router the SPID number that has been assigned by the ISDN service provider for the B2 channel. Use the no isdn spid2 command to disable the specified SPID, thereby preventing access to the switch. If you include the LDN in the no form of this command, the access to the switch is permitted, but the other B channel might not be able to receive incoming calls.
| spid-number | Number identifying the service to which you have subscribed. This value is assigned by the ISDN service provider and is usually a ten-digit telephone number with some extra digits. |
| ldn | (Optional) Local directory number. This is a seven-digit number also assigned by the service provider. |
To configure a central office switch on the ISDN interface, use the isdn switch-type global configuration command.
| switch-type | Central office switch type; see the ISDN office switch types table in the Router Products Command Reference publication for a list of supported switches. |
isdn tei [first-call | powerup]
no isdn tei
To configure when ISDN terminal endpoint identifier (TEI) negotiation should occur, use the isdn tei global configuration command. Use the no form of this command to restore the default.
| first-call | ISDN TEI negotiation should occur when the first ISDN call is placed or received. |
| powerup | ISDN TEI negotiation should occur when the router is powered on.The default is powerup. |
Use the keepalive interface configuration command to set the keepalive timer for a specific interface. The no form of this command turns off keepalives entirely.
| seconds | (Optional) Unsigned integer value greater than 0. The default is 10 seconds. |
Use the linecode command to select the line-code type for the T1 line.
| ami | Specifies AMI as the line-code type.This is the default. |
| b8zs | Specifies B8ZS as the line-code type. |
To diagnose equipment malfunctions between interface and device, use the loopback interface configuration command. The no form of this command disables the test.
To 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.
To loop packets to DTE internally within the CSU/DSU at the DTE interface, when the device supports this feature, use the loopback interface configuration command. To remove the loop, use the no form of this command.
To 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.
To loop packets at the router physical interface on a T1 line, use the loopback local controller configuration command. To remove the loop, use the no form of this command.
To loop packets completely through the CSU/DSU, over the DS3 link, to the remote CSU/DSU and back, use the loopback remote controller configuration command. To remove the loop, use the no form of this command.
[no] media-type [aui | 10baset]
To specify the Ethernet Network Interface Module configuration on the Cisco 4000 series, use the media-type interface configuration command.
| aui | (Optional) Selects a 15-pin physical connection. |
| 10baset | (Optional) Selects an RJ45 10BaseT physical connection. |
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 form of this command.
To 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.
To 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.
| 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.
To prevent an interface from receiving NTP packets, use the ntp disable interface configuration command. To enable receipt of NTP packets on an interface, use the no form of this command.
ppp [default | client [@tacacs-server]] [/routing]
To make an asynchronous connection from the auxiliary port using the Point-to-Point Protocol (PPP), enter the ppp EXEC command.
| default | (Optional) Makes PPP connection when a default address has been configured. |
| client | (Optional) IP address or the name of the client workstation or PC. |
| @tacacs-server | (Optional) IP address or IP host name of the TACACS server to which the user's TACACS authentication request is to be sent. |
| /routing | (Optional) Indicates asynchronous routing is enabled. |
To enable Challenge Handshake Authentication Protocol (CHAP) on a serial interface, use the ppp authentication chap interface configuration command. Use the no form of this command to disable this encapsulation.
To enable Password Authentication Protocol (PAP) on a serial interface, use the ppp authenticate pap interface configuration command. To disable this feature, use the no form of this command.
ppp quality percentage
no ppp quality
To enable Link Quality Monitoring (LQM) on a serial interface, use the ppp quality interface configuration command. Use the no form of this command to disable LQM.
| percentage | Link quality threshold. The range is 1 to 100. |
pulse-time seconds
no pulse-time
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.
| seconds | Integer that specifies the DTR signal interval in seconds. The default is 0 seconds. |
To set the ring speed for the CSC-1R, CSC-2R, and IGS/TR Token Ring interfaces, use the ring-speed interface configuration command.
| speed | Integer that specifies the ring speed, either 4 for 4-Mbps or 16 for 16-Mbps operation. The default is 16-Mbps operation. |
To list the status of the asynchronous interface 1 associated with the router auxiliary port, use the show async status user EXEC command.
To display compression statistics, use the show compress EXEC command.
To display information about the ISDN Basic Rate Interface (BRI) on a Cisco 3000, use the show controllers bri privileged EXEC command.
Use the show controllers cbus privileged EXEC command on the AGS+ to display all information under the ciscoBus controller card. This command also shows the capabilities of the card and reports controller-related failures.
Use the show controllers cxbus privileged EXEC command to display information about the switch processor (SP) CxBus controller on the Cisco 7000 series. This command displays information that is specific to the interface hardware. The information displayed is generally useful for diagnostic tasks performed by technical support personnel only.
show controllers ethernet interface-number
Use the show controllers ethernet EXEC command to display information on the Cisco 2500, Cisco 3000, or Cisco 4000.
| interface-number | Interface number of the Ethernet interface |
Use the show controllers fddi user EXEC command to display all information under the FDDI controller card on the AGS+ or FDDI Interface Processor (FIP) on the Cisco 7000 series.
Use the show controllers mci privileged EXEC command to display all information under the Multiport Communications Interface card or the SCI. This command displays information the system uses for bridging and routing that is specific to the interface hardware. The information displayed is generally useful for diagnostic tasks performed by technical support personnel only.
Use the show interfaces serial privileged EXEC command to display information specific to the interface hardware. The information displayed is generally useful for diagnostic tasks performed by technical support personnel only.
show controllers t1 [slot/port]
Use the show controllers t1 privileged EXEC command on the Cisco 7000 to display information about the T1 links supported by the Multichannel Interface Processor (MIP). This command displays controller status information that is specific to the controller hardware. The information displayed is generally useful for diagnostic tasks performed by technical support personnel only.
| slot | Backplane slot number; can be 0, 1, 2, 3, or 4. |
| port | Port number of the controller; can be 0, 1, 2, or 3. |
Use the show controllers token privileged EXEC command to display information about memory management, error counters, and the CSC-R, CSC-1R, CSC-2R, C2CTR, and CSC-R16 (or CSC-R16M) Token Ring interface cards or Token Ring Interface Processor (TRIP), in the case of the Cisco 7000 series.
show interfaces [type unit] [first] [last] [accounting]
show interfaces [type slot/port] [accounting] (for the Cisco 7000 series)
Use the show interfaces EXEC command to display statistics for all interfaces configured on the router. The resulting output varies, depending on the network for which an interface has been configured.
| type unit | (Optional) Specify that information for a particular interface controller be displayed. Allowed values for type include async, bri0, ethernet, fddi, hssi, loopback, null, serial, tokenring, and tunnel. For the Cisco 7000 series, type can be atm, ethernet, fddi, serial, or tokenring.
The argument unit must match a port number on the selected interface controller. |
| first last | (Optional) The Cisco 2500 and 3000 series support the ISDN Basic Rate Interface (BRI). 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. You can show these numbers for all interfaces, or you can specify a specific type and unit. |
| slot | Backplane slot number and can be 0, 1, 2, 3, or 4. |
| port | Specifies the port number of the interface and can be 0, 1, 2, 3, 4, or 5 depending on the type of interface, as follows:
AIP (ATM Interface Processor)--0 EIP (Ethernet Interface Processor)--0, 1, 2, 3, 4, or 5 FIP (FDDI Interface Processor)--0 FSIP (Fast Serial Interface Processor)--0, 1, 2, HIP (HSSI Interface Processor) 0 TRIP (Token Ring Interface Processor)--0, 1, 2, or 3 |
show interfaces async [unit] [accounting]
Use the show interfaces async privileged EXEC command to display information about the serial interface.
| unit | (Optional) Must be 1. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
show interfaces atm [slot/port]
Use the show interfaces atm EXEC command to display information about the ATM interface.
| slot/port | (Optional) In the Cisco 7000, slot can be 0, 1, 2, 3, or 4. In the Cisco 7010, slot can be 0, 1, or 2. Port must be 0. |
show interfaces bri [first] [last] [accounting]
Use the show interfaces bri privileged EXEC command to display information about the BRI D and B channels.
| first last | (Optional) 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 have been sent through the interface. |
show interfaces ethernet unit [accounting]
show interfaces ethernet slot/port [accounting] (for the Cisco 7000
series)
Use the show interfaces ethernet privileged EXEC command to display information about an Ethernet interface on the router.
| 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 | On a Cisco 7000 series, slot location of the interface processor. |
| port | On a Cisco 7000 series, port number on the interface. |
show interfaces fddi unit [accounting]
show interfaces fddi slot/port [accounting] (for the Cisco 7000 series)
Use the show interfaces fddi user EXEC command to display information about the FDDI interface.
| 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 | On a Cisco 7000 series, slot location of the interface processor. |
| port | On a Cisco 7000 series, port number on the interface. |
show interfaces hssi unit [accounting]
show interfaces hssi slot/port [accounting] (for the Cisco 7000 series)
Use the show interfaces hssi privileged EXEC command to display information about the HSSI interface.
| 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 | On a Cisco 7000 series, slot location of the interface processor. |
| port | On a Cisco 7000 series, port number on the interface. |
To list a brief summary of an interface IP information and status, use the show interfaces ip-brief privileged EXEC command.
show interfaces loopback [unit] [accounting]
Use the show interfaces loopback privileged EXEC command to display information about the dialer interface.
| unit | (Optional) 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. |
show interfaces serial unit [accounting]
show interfaces serial slot/port [accounting] (for the Cisco 7000 series)
Use the show interfaces serial privileged EXEC command to display information about a serial interface.
| unit | Must match the interface port number. |
| accounting | (Optional) Displays the number of packets of each protocol type that have been sent through the interface. |
| slot | On a Cisco 7000 series, slot location of the interface processor. |
| port | On a Cisco 7000 series, port number on interface. |
show interfaces tokenring unit [accounting]
show interfaces tokenring slot/port [accounting] (for the Cisco 7000
series)
Use the show interfaces tokenring privileged EXEC command to display information about the Token Ring interface and the state of source route bridging.
| 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 a Cisco 7000 series, slot location of the interface processor.Value can be 0, 1, 2, 3, or 4. In the Cisco 7010, value can be 0, 1, or 2. |
| port | On a Cisco 7000 series, port number on interface. Value can be 0, 1, 2, or 3. |
show interfaces tunnel unit [accounting]
To list tunnel interface information, use the show interfaces tunnel privileged EXEC command.
| 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. |
Use the show rif EXEC command to display the current contents of the RIF cache.
To disable an interface, use the shutdown interface configuration command. To restart a disabled interface, use the no form of this command.
slip [default | client [@tacacs-server]] [/routing] [/compressed]
To make a SLIP connection on the auxiliary port, use the slip user EXEC command.
| default | (Optional) Makes a SLIP connection when a default address has been configured. |
| client | (Optional) IP address or the name of the client workstation or PC. |
| @tacacs-server | (Optional) IP address or IP hostname of the TACACS server to which the user's TACACS authentication request is sent. |
| /routing | (Optional) Indicates routing is enabled. Asynchronous interface 1 must be configured for async dynamic routing. |
| /compressed | (Optional) Indicates IP header compression should be used on the link. |
smt-queue-threshold number
no smt-queue-threshold
To 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.
| number | Number of buffers used to store unprocessed SMT messages that are to be queued for processing. Acceptable values are positive integers.The default threshold value is equal to the number of FDDI interfaces installed in the router. |
[no] squelch {normal | reduced}
To extend the Ethernet twisted-pair 10BaseT capability beyond the standard 100 meters on the Cisco 4000 platform, use the squelch interface configuration command.squelch {normal | reduced}
| normal | Allows normal capability. The default value is normal range. |
| reduced | Allows extended 10BaseT capability. |
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. Use the no form of this command to disable the feature.
transmitter-delay {microseconds | hdlc-flags}
no transmitter-delay
To 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.
| microseconds | Approximate number of microseconds of minimum delay after transmitting a packet on the MCI and SCI interface cards. The default is 0 microseconds. |
| hdlc-flags | Minimum number of HDLC flags to be sent between each packet on the HIP, HSCI, FSIP, or HSSI. The valid range on the HSSI is 2 to 128000. |
To 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 the command.
tunnel destination {hostname | ip-address}
no tunnel destination
To specify a tunnel interface's destination, use the tunnel destination interface configuration command. To remove the destination, use the no form of this command.
| hostname | Name of the host destination. |
| ip-address | IP address of the host destination expressed in decimal in four-part, dotted notation |
tunnel key key-number
no tunnel key
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.
| key-number | Integer from 0 to 4294967295 |
tunnel mode {cayman | eon | gre ip | nos}
no tunnel mode
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 the command.
| cayman | Cayman TunnelTalk AppleTalk encapsulation. |
| eon | EON compatible CLNS tunnel. |
| gre ip | Generic route encapsulation protocol over IP. The default is gre ip. |
| nos | KA9Q/NOS compatible IP over IP. |
[no] tunnel sequence-datagrams
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 source ip-address | interface-type interface-number
no tunnel source
To set a tunnel interface's source address, use the tunnel source interface configuring command. To remove the source address, use the no form of the command.
| ip-address | IP address to use as the source address for packets in the tunnel. |
| interface-type | All types. |
| interface-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.
| number | Maximum number of transmit buffers that the specified interface can subscribe. Defaults and specified limits are displayed with the show controllers mci EXEC command. |
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