Command Reference Guide

180 ● is-level 3Com Router 5000 Family and Router 6000 Family
Command Reference
is-level
Purpose Use the is-level command to configure the IS-IS level.
Use the undo is-level command to restore the default setting.
Syntax is-level { level-1 | level-1-2 | level-2 }
undo is-level
Parameters level-1
Configures the router to operate at Level-1, only
calculate the intra-area routes and maintain the LSDB
of L1.
level-1-2
Configures the router to operate at Level-1-2, calculate
both the L1 and L2 routes and maintain the LSDB of
Level-1 and Level-2.
level-2
Configures the router to operate at Level-2, only
switch Level-2 LSP and calculate the Level-2 routes and
maintain the LSDB of Level-2.
Default By default, the value is level-1-2.
Example Set the current router to operate on Level-1.
[3Com ] isis
[3Com -isis] is-level level-1
View This command can be used in the following views:
■ IS-IS view
Description You are recommended to set the system level when configuring IS-IS.
If there is only one area, you are recommended to set the level of all the routers as
Level-1 or Level-2, because it is not necessary for all the routers to maintain two
identical databases. You are recommended to set all the routers to Level-2 for
convenient future extension, when applying them to IP network.