Tuning And Optimizing Is-Is Networks; Configuration Prerequisites; Specifying Intervals For Sending Is-Is Hello And Csnp Packets; Specifying The Is-Is Hello Multiplier - HP 4800G Series Configuration Manual

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Tuning and Optimizing IS-IS Networks

Configuration Prerequisites

Before the configuration, accomplish the following tasks:
Configure IP addresses for interfaces, and make adjacent nodes reachable to each other at the
network layer.
Enable IS-IS.

Specifying Intervals for Sending IS-IS Hello and CSNP Packets

Follow these steps to configure intervals for sending IS-IS hello and CSNP packets:
To do...
Enter system view
Enter interface view
Specify the interval for sending
hello packets
Specify the interval for sending
CSNP packets on the DIS of a
broadcast network
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 times the hello interval.
Follow these steps to specify the IS-IS hello multiplier:
Enter system view
Enter interface view
Specify the number of hello packets a
neighbor must miss before declaring
the router is down
system-view
interface interface-type
interface-number
isis timer hello seconds
[ level-1 | level-2 ]
isis timer csnp seconds
[ level-1 | level-2 ]
To do...
Use the command...
Use the command...
system-view
interface interface-type
interface-number
isis timer holding-multiplier
value [ level-1 | level-2 ]
1-23
Remarks
––
––
Optional
10 seconds by default
Optional
10 seconds by default
Remarks
––
––
Optional
3 by default

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