Command Reference Guide

3Com Router 5000 Family and Router 6000 Family sdlc status ● 175
Command Reference
sdlc status
Purpose Use the sdlc role command to configure the SDLC role the device acts.
Use the undo sdlc role command to restore the default SDLC role.
Syntax sdlc status { primary | secondary }
undo sdlc status
Parameters primary
The primary station of the end, controlling the whole
connection process.
secondary
The secondary station of the end, controlled by the
primary station.
Default By default, the device has no role.
Example Configure the SDLC device connected with the Serial1/0/0 as primary, and the local
interface as secondary.
[3Com -Serial1/0/0] sdlc role secondary
View This command can be used in the following views:
■ Synchronous Serial Interface view
Description The SDLC is a kind of link layer protocol in unbalanced mode. That is, the statuses of
the devices on the two connected ends are unequal: one is primary and the other is
secondary. The primary side, being the primary station, whose role is primary, plays
the dominant role and controls the whole connection process. While the other side,
being the secondary station, whose role is secondary, receives control passively.
Therefore, the user needs to configure the role for the interface encapsulated with
SDLC protocol. On the SDLC role configuration, the roles should be decided by the
status of the SDLC device connected with the local router. If the SDLC device
connected with the local interface is primary, the local interface is to be set secondary,
and vice versa.
In general, the central IBM mainframe is primary, whereas terminal devices, including
UNIX hosts and ATM, are secondary.