H3C Technologies H3C S10500 Series Switches - Manual (Page 164)

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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.