R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

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NOTE:
• If a filter policy is specified, only routes passing it can be advertised into Level-1 area.
• You can specify a routing policy in the import-route isis level-2 into level-1 command to filter routes
from Level-2 to Level-1. Other routing policies specified for route reception and redistribution does not
affect the route leaking.
Tuning and optimizing IS-IS networks
Configuration prerequisites
Before the configuration, complete the following tasks:
• Configure IP addresses for interfaces, and make sure that all neighboring nodes can reach each
other at the network layer.
• Enable IS-IS.
Specifying intervals for sending IS-IS hello and CSNP packets
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Specify the interval for
sending hello packets.
isis timer hello seconds [ level-1 |
level-2 ]
Optional.
10 seconds by default.
4. Specify the interval for
sending CSNP packets on the
DIS of a broadcast network.
isis timer csnp seconds [ level-1 |
level-2 ]
Optional.
10 seconds by default.
NOTE:
The interval between hello packets sent by the DIS is 1/3 the hello interval set with the isis timer hello
command.
Specifying the IS-IS hello multiplier
If a neighbor receives no hello packets from the router within the advertised hold time, it considers the
router down and recalculates the routes. The hold time is the hello multiplier multiplied by the hello
interval.
To specify the IS-IS hello multiplier:
Ste
p
Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A