F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

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Tuning and optimizing IS-IS networks
682BConfiguration prerequisites
Before the configuration, complete the following tasks:
• Configure IP addresses for all interfaces to ensure IP connectivity between neighboring nodes.
• Enable IS-IS.
683BSpecifying intervals for sending IS-IS hello and CSNP packets
Ste
p
Command Remarks
373. Enter system view.
system-view N/A
374. Enter interface view.
interface interface-type
interface-number
N/A
375. Specify the interval for
sending hello packets.
isis timer hello seconds
[ level-1 | level-2 ]
Optional.
The default setting is 10 seconds.
The interval between hello packets sent by
the DIS is 1/3 the hello interval set with the
isis timer hello command.
376. Specify the interval for
sending CSNP packets on the
DIS of a broadcast network.
isis timer csnp seconds
[ level-1 | level-2 ]
Optional.
The default setting is 10 seconds.
684BSpecifying 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.
On a broadcast link, Level-1 and Level-2 hello packets are advertised separately. You must set a hello
multiplier for each level.
On a P2P link, Level-1 and Level-2 hello packets are advertised in P2P hello packets. You do not need to
specify Level-1 or Level-2.
To specify the IS-IS hello multiplier:
Ste
p
Command Remarks
377. Enter system view. system-view N/A
378. Enter interface view.
interface interface-type
interface-number
N/A
379. Specify the number of hello packets a
neighbor must miss before declaring
the router is down.
isis timer holding-multiplier value
[ level-1 | level-2 ]
Optional.
he default setting is 3.