interface interface Use the interface global configuration command to configure an interface type and enter interface configuration mode.
interface Default No interface types are configured. Command Mode Global configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.0 for the Cisco 7000 series routers. This command first appeared in Cisco IOS Release 11.0 for the Cisco 4000 series routers. This command was changed in Cisco IOS Release 11.2 to add the posi keyword. This command was changed in Cisco IOS Release 11.3 to change the posi keyword to pos. This command was changed in Cisco IOS Release 12.
interface Table 10 Interface Type Keywords (continued) Keyword Interface Type tokenring Token Ring interface. tunnel Tunnel interface; a virtual interface. The number is the number of the tunnel interface that you want to create or configure. There is no limit on the number of tunnel interfaces you can create.
interface Related Commands You can use the master indexes or search online to find documentation of related commands.
interface dialer interface dialer To designate a dialer rotary group leader, use the interface dialer global configuration command. interface dialer interface-number Syntax Description interface-number Integer that you select to indicate a dialer rotary group in the range 0 to 9. Default No dialer rotary group leader is specified. Command Mode Global configuration Usage Guidelines Dialer rotary groups allow you to apply a single interface configuration to a set of interfaces.
interface fastethernet interface fastethernet To select a particular Fast Ethernet interface for configuration, use the interface fastethernet global configuration command. interface fastethernet number (Cisco 4500 and 4700 series routers) interface fastethernet slot/port (Cisco 7200 series routers) interface fastethernet slot/port-adapter/port (Cisco 7500 series routers) Syntax Description number Port, connector, or interface card number.
interface group-async interface group-async To create a group interface that will serve as master, to which asynchronous interfaces can be associated as members, use the interface group-async global configuration command. Use the no form of the command to restore the default. interface group-async unit-number no interface group-async unit-number Syntax Description unit-number The number of the asynchronous group interface being created. Default No interfaces are designated as group masters.
interface port-channel interface port-channel To specify a Fast EtherChannel and enter interface configuration mode, use the interface port-channel global configuration command. interface port-channel channel-number Syntax Description channel-number Channel number assigned to this port-channel interface. Range is 1 to 4. Default No Fast EtherChannel is specified. Command Mode Global configuration Usage Guidelines This command first appeared in Cisco IOS Release 11.1 CA.
interface port-channel Note If you do not assign a static MAC address on the port-channel interface, the Cisco IOS software automatically assigns a MAC address. If you assign a static MAC address and then later remove it, the Cisco IOS software automatically assigns a MAC address. Caution With Release 11.1(20)CC, the Fast EtherChannel supports CEF/dCEF.
interface vg-anylan interface vg-anylan Use the interface vg-anylan global configuration command to specify the interface on a 100VG-AnyLAN port adapter and enter interface configuration mode on Cisco 7200 series routers and Cisco 7500 series routers. interface vg-anylan slot/port-adapter/port (VIP cards in Cisco 7500 series routers) interface vg-anylan slot/port (Cisco 7200 series routers) Syntax Description slot Refer to the appropriate hardware manual for slot and port information.
international bit international bit To set the E3 international bit in the G.751 frame used by the PA-E3 port adapter, use the international bit interface configuration command. To return to the default international bit, use the no form of this command. international bit {0 | 1} {0 | 1} no international bit Syntax Description 0|1 Specifies the value of the first international bit in the G.751 frame. The default is 0. 0|1 Specifies the value of the second international bit in the G.751 frame.
invert data invert data To invert the data stream, use the invert data interface configuration command. This command applies only to the Cisco 7000 series routers with the RSP7000 and RSP7000CI, Cisco 7200 series routers, and Cisco 7500 series routers. Use the no form of this command to disable inverting the data stream. invert data no invert data Syntax Description This command has no arguments or keywords. Default Data is not inverted.
invert data Related Commands You can use the master indexes or search online to find documentation of related commands.
invert rxclock invert rxclock To configure UIO serial port 0 or 1 on the Cisco MC3810 when the cable connected is DCE type, use the invert rxclock interface configuration command. The command inverts the phase of the RX clock on the UIO serial interface, which does not use the T1/E1 interface. To disable the phase inversion, use the no form of this command. invert rxclock no invert rxclock Syntax Description This command has no arguments or keywords. Default Receive clock signal is not inverted.
invert-transmit-clock invert-transmit-clock The invert txclock command replaces this command. Refer to the description of invert txclock for information on the transmit clock signal.
invert txclock invert txclock Use the invert txclock interface configuration command to invert the transmit clock signal. 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 can have variances that differ slightly.The invert txclock command compensates for these variances. This command replaces the invert-transmit-clock command.
keepalive keepalive To 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] no keepalive [seconds] Syntax Description seconds (Optional) Unsigned integer value greater than 0. The default is 10 seconds. Default 10 seconds Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.0.
lex burned-in-address lex burned-in-address 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 no lex burned-in-address Syntax Description ieee-address 48-bit IEEE MAC address written as a dotted triplet of four-digit hexadecimal numbers. Default No burned-in MAC address is set.
lex input-address-list lex input-address-list 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 no lex input-address-list Syntax Description 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.
lex input-type-list lex input-type-list Use the lex input-type-list interface configuration command to assign an access list that filters Ethernet packets by type code. To remove an access list from the interface, use the no form of this command. lex input-type-list access-list-number no lex input-type-list Syntax Description 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.
lex priority-group lex priority-group Use the lex priority-group interface configuration command to activate priority output queuing on the LAN Extender. To disable priority output queuing, use the no form of this command. lex priority-group group no lex priority-group Syntax Description group Number of the priority group. It can be a number in the range 1 to 10. Default Disabled Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.3.
lex retry-count lex retry-count Use the lex retry-count interface configuration command to define the number of times to resend commands to the LAN Extender chassis. To return to the default value, use the no form of this command. lex retry-count number no lex retry-count [number] Syntax Description 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.
lex timeout lex timeout Use the lex timeout interface configuration command to define the amount of time to wait for a response from the LAN Extender. To return to the default time, use the no form of this command. lex timeout milliseconds no lex timeout [milliseconds] Syntax Description 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).
linecode linecode Use the linecode controller configuration command to select the line-code type for T1 or E1 line. linecode {ami | b8zs | hdb3} Syntax Description ami Specifies alternate mark inversion (AMI) as the line-code type. Valid for T1 or E1 controllers. 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. Defaults AMI is the default for T1 lines.
link-test link-test 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-test no link-test Syntax Description This command has no arguments or keywords.
local-lnm local-lnm To 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-lnm no local-lnm Syntax Description This command has no arguments or keywords. Default Management is not enabled. Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.3.
loopback (interface) loopback (interface) To diagnose equipment malfunctions between interface and device, use the loopback interface configuration command. The no form of this command disables the test. loopback no loopback Syntax Description This command has no arguments or keywords. Default Disabled Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.0.
loopback (interface) Related Commands You can use the master indexes or search online to find documentation of related commands.
loopback (E3/T3 interface) loopback (E3/T3 interface) To loop the serial interface on a PA-E3 or a PA-T3 port adapter, use the loopback interface configuration command. To remove the loopback, use the no form of this command. loopback {dte | local | network {line | payload}} (PA-E3) loopback {dte | local | network {line | payload} | remote} (PA-T3) no loopback Syntax Description dte Sets the loopback after the LIU toward the terminal.
loopback (T1 interface) loopback (T1 interface) To loop individual T1 channels on the Channelized T3 Interface Processor (CT3IP) in Cisco 7000 series routers with the RSP7000 and RSP7000CI and in Cisco 7500 series routers, use the loopback interface configuration command. Use the no form of this command to remove the loopback.
loopback (T1 interface) To better diagnose T1 provisioning problems, you can place the the remote CSU or remote SmartJack into loopback. The loopback remote line fdl interface configuration command allows you to place either the CSU or the SmartJack into loopback: • • ansi—Places the CSU into loopback, per the ANSI T1.
loopback (T1 interface) Related Commands You can use the master indexes or search online to find documentation of related commands.
loopback (T3 controller) loopback (T3 controller) To loop the entire T3 (all 28 T1 channels) on the Channelized T3 Interface Processor (CT3IP) in Cisco 7500 series routers, use the loopback controller configuration command. Use the no form of this command to remove the loopback. loopback [local | network | remote] no loopback Syntax Description local (Optional) Loops the data back toward the router and sends an AIS signal out toward the network.
loopback applique loopback applique 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. loopback applique no loopback applique Syntax Description This command has no arguments or keywords. Default Disabled Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.0.
loopback dte loopback dte To loop packets back to the DTE from the CSU/DSU, when the device supports this feature, use the loopback interface configuration command. To remove the loop, use the no form of this command. loopback dte no loopback dte Syntax Description This command has no arguments or keywords. Default Disabled Command Mode Interface configuration Usage Guidelines This command first appeared in Cisco IOS Release 10.0. This command is useful for testing the DTE-to-DCE cable.
loopback line loopback line Use the loopback line interface configuration command, to loop packets completely through the CSU/DSU to configure the CSU loop. To remove the loop, use the no form of this command. loopback line [payload] no loopback line [payload] Syntax Description payload (Optional) Configures a loopback point at the DSU and loops back data to the network on an integrated CSU/DSU.
loopback line Examples The following example configures the loopback test on the DCE device: interface serial 1 loopback line The following example shows how to configure a payload loopback on a Cisco 2524 or 2525 router: Router1(config-if)#loopback line payload Loopback in progress Router1(config-if)#no loopback line The following example shows the output on a Cisco 2524 or 2525 router when you loop a packet in switched mode without an active connection: Router1(config-if)#service-module 56k network-typ
loopback remote (interface) loopback remote (interface) To 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 loopback, use the no form of this command.
loopback remote (interface) Syntax Description for 2- and 4-Wire, 56/64-kbps CSU/DSU Modules 2047 Transmits a pseudo-random test pattern that repeats after 2047 bits. 511 Transmits a pseudo-random test pattern that repeats after 511 bits. stress-pattern pattern number 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.
loopback remote (interface) For the 2- and 4-wire, 56/64-kbps CSU/DSU module, an active connection is required before a loopup can be initiated while in switched mode. When transmitting V.54 loopbacks, the remote device is commanded into loopback using V.54 messages. Failure to loopup or initiate a remote loopback request could be caused by enabling the no service-module 56k remote-loopback command. To show interfaces currently in loopback operation, use the show interfaces loopback EXEC command.
