Command Reference Guide

3Com Router 5000 Family and Router 6000 Family preference ● 253
Command Reference
preference
Purpose Use the preference command to configure the preference of an OSPF protocol
route.
Use the undo preference command to restore the default value of the OSPF
protocol route.
Syntax preference [ ase ] value
undo preference [ ase ]
Parameters value
OSPF protocol route preference. Valid values are 1 to
255.
ase
Preference of an redistributed external route of the AS.
Default By default, the preference of an OSPF protocol internal route is 10 and the preference
of an external route is 150.
Example Specify the preference of an external redistributed route of the AS as 160.
[3Com -ospf-1] preference ase 160y
View This command can be used in the following views:
■ OSPF view
Description Because multiple dynamic routing protocols could be running on a router, there is the
problem of routing information sharing among routing protocols and selection.
Therefore, a default preference is specified for each routing protocol. When multiple
routes to the same destination are found by different routing protocols, the route
found by high preference routing protocol will be selected to forward IP packets.