is-level
Use is-level to specify the IS level.
Use undo is-level to restore the default.
Syntax
is-level { level-1 | level-1-2 | level-2 }
undo is-level
Default
The IS level is level-1-2.
Views
IS-IS view
Predefined user roles
network-admin
Parameters
level-1: Specifies Level-1, which means IS-IS only calculates intra-area routes and maintains the Level-1 LSDB.
level-1-2: Specifies Level-1-2, which means IS-IS calculates routes and maintains the LSDBs for both Level-1 and Level-2.
level-2: Specifies Level-2, which means IS-IS calculates routes and maintains the LSDB for Level-2 only.
Usage guidelines
If only one area exists, configure all the routers as either Level-1 or Level-2, because the routers do not need to maintain two identical LSDBs at the same time.
If the only area is an IP network, configure all the routers as Level-2 for scalability.
Examples
# Set the IS level to Level-1 for IS-IS process 1.
<Sysname> system-view [Sysname] isis 1 [Sysname-isis-1] is-level level-1