R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

138
Ste
p
Command Remarks
2. Create an IS-IS process and enter
its view.
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
By default, the IS-IS process is
disabled.
3. Assign a NET.
network-entity net By default, NET is not assigned.
4. Return to system view.
quit N/A
5. Enter interface view.
interface interface-type
interface-number
N/A
6. Enable an IS-IS process on the
interface.
isis enable [ process-id ]
By default, no IS-IS process is
enabled.
Configuring the IS level and circuit level
Follow these guidelines when you configure the IS level for routers in only one area:
• 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 good 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, configure the circuit level for its interfaces as Level-1 or Level-2. This will
limit neighbor relationship establishment.
To configure the IS level and circuit level:
Ste
p
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 }
By default, the IS level 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 ]
By default, an interface can establish
either the Level-1 or Level-2
adjacency.
Configuring P2P network type for an interface
Perform this task only for a broadcast network that has up to two attached routers.
Interfaces with different network types operate differently. For example, broadcast interfaces on a
network must elect the DIS and flood CSNP packets to synchronize the LSDBs. However, P2P interfaces
on a network do not need to elect the DIS, and have a different LSDB synchronization mechanism.