Hardware manual

interface

IR-110

Cisco IOS Interface Command Reference

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 12.0 to add the switch keyword.

Subinterfaces can be conﬁgured to support partially meshed Frame Relay networks. Refer to the part

entitled “Conﬁguring Serial Interfaces” in the Cisco IOS Interface Conﬁguration Guide.

There is no correlation between the number of the physical serial interface and the number of the

logical LAN Extender interface. These interfaces can have the same or different numbers.

Table 10 Interface Type Keywords

Keyword Interface Type

async Port line used as an asynchronous interface.

atm ATM interface.

bri Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI).

This interface conﬁguration is propagated to each of the B channels.

B channels cannot be individually conﬁgured. The interface must be

conﬁgured with dial-on-demand commands in order for calls to be placed

on that interface.

dialer Dialer interface.

ethernet Ethernet IEEE 802.3 interface.

fastethernet 100-Mbps Ethernet interface on the Cisco 4500, Cisco 4700, Cisco 7000

and Cisco 7500 series routers.

fddi Fiber Distributed Data Interface (FDDI).

group-async Master asynchronous interface.

hssi High-Speed Serial Interface (HSSI).

lex LAN Extender (LEX) interface.

loopback Software-only loopback interface that emulates an interface that is always

up. It is a virtual interface supported on all platforms. The interface-number

is the number of the loopback interface that you want to create or conﬁgure.

There is no limit on the number of loopback interfaces you can create.

null Null interface.

port-channel Port channel interface

pos Packet OC-3 interface on the Packet over SONET Interface Processor

serial Serial interface.

switch Switch interface