Command Reference Guide

3Com Router 5000 Family and Router 6000 Family x25 default-protocol ● 187
Command Reference
x25 default-protocol
Purpose Use the x25 default-protocol command to set the upper layer protocol for an
X.25 interface that X.25 protocol carries by default.
Use the undo x25 default-protocol command to revert to the default upper
layer protocol.
Syntax x25 default-protocol [ protocol-type ]
undo x25 default-protocol
Parameters protocol-type
Protocol type, which can be IP or CLNS.
Default The default upper layer protocol carried by X.25 protocol is IP.
Example Set the default upper layer protocol that the X.25 interface Serial0/0/0 carries to OSI
protocol.
[3Com -Serial0/0/0] x25 default-protocol clns
View This command can be used in the following views:
■ Interface view
Description During course of establishing a X.25 SVC, the called party checks the CUD (call user
data) fields in X.25 call request packets and reject the call request if the CUD fields
cannot be recognized. You can specify a default upper layer protocol that X.25
carries, through which an call request packet with unrecognized CUD field is treated
as the PDU (protocol data unit) of the default upper layer protocol.