Configuring the is level and circuit level – H3C Technologies H3C SecPath F1000-E User Manual
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Step Command
Remarks
5.
Enter interface view.
interface interface-type
interface-number
N/A
6.
Enable an IS-IS process on the
interface.
isis enable [ process-id ]
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, you can configure the circuit level for its interfaces as Level-1 (or Level-2)
to limit neighbor relationship establishment.
To configure the IS level and circuit level:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IS-IS view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3.
Specify the IS level.
is-level { level-1 | level-1-2 |
level-2 }
Optional.
The default is Level-1-2.
4.
Return to system view.
quit
N/A
5.
Enter interface view.
interface interface-type
interface-number
N/A
6.
Specify the circuit level.
isis circuit-level [ level-1 | level-1-2
| level-2 ]
Optional.
The default is Level-1-2.
Configuring the network type of an interface as P2P
Interfaces with different network types operate differently. For example, broadcast interfaces on a
network need to elect the DIS and flood CSNP packets to synchronize the LSDBs, but P2P interfaces on
a network do not need to elect the DIS and have a different LSDB synchronization mechanism.
If only two routers exist on a broadcast network, configure the network type of attached interfaces as P2P
to avoid DIS election and CSNP flooding, saving network bandwidth and speeding up network
convergence.
To configure the network type of an interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A