Command Reference Guide

3Com Router 5000 Family and Router 6000 Family link-protocol lapb ● 215
Command Reference
link-protocol lapb
Purpose Use the link-protocol lapb command to specify the link layer protocol of the
interface as LAPB.
Syntax link-protocol lapb [ dte | dce ] [ ip | multi-protocol ]
Parameters dte
Indicates that the interface works in DTE mode of
LAPB.
dce
Indicates that the interface works in DCE mode of
LAPB.
ip
Indicates that the network layer protocol borne by
LAPB is IP.
Default By default, DTE is the default LAPB operating mode. IP is the default network layer
protocol.
Example Configure LAPB as the link layer protocol of the interface Serial 0/0/0, and enable it to
work in DCE mode.
[3Com-Serial0/0/0] link-protocol lapb dce
View This command can be used in the following views:
■ Interface view
Description Though LAPB is a layer-2 protocol of X.25, it can act as an independent link-layer
protocol for simple data transmission. Generally, LAPB can be used when two routers
are directly connected with a dedicated line. At that time one end works in the DTE
mode, and the other in the DCE mode.
Related Command display interface