146
•
Configure an IP address for each interface, and make sure all neighboring nodes are reachable to
each other at the network layer.
Enabling IS-IS
Follow these steps to enable IS-IS:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enable the IS-IS routing process
and enter its view
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
Required
Not enabled by default
Assign a network entity title (NET)
network-entity
net
Required
Not assigned by default
Return to system view
quit
—
Enter interface view
interface
interface-type
interface-number
—
Enable an IS-IS process on the
interface
isis enable
[
process-id
]
Required
Disabled by default
Configuring the IS level and circuit level
If only one area is available, H3C recommends you to perform the following operations:
•
Configure the IS level of all routers as Level-1 or Level-2 rather than different levels because the
routers do not need to maintain two identical LSDBs.
•
Configure the IS level as Level-2 on all routers in an IP network for scalability.
For an interface of a Level-1 (or Level-2) router, the circuit level can only be Level-1 (or Level-2). For an
interface of a Level-1-2 router, the default circuit level is Level-1-2; if the router only needs to form Level-1 (or
Level-2) neighbor relationships, then configure the circuit level for its interfaces as Level-1 (or Level-2) to
limit neighbor relationship establishment.
Follow these steps to configure the IS level and circuit level:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter IS-IS view
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
—
Specify the IS level
is-level
{
level-1
|
level-1-2
|
level-2
}
Optional
The default is Level-1-2.
Return to system view
quit
—
Enter interface view
interface
interface-type
interface-number
—
Specify the circuit level
isis circuit-level
[
level-1
|
level-1-2
|
level-2
]
Optional
By default, an interface can establish
the Level-1 or Level-2 adjacency.
