H3C Technologies H3C S12500 Series Switches - Manual (Page 170)

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Specifying intervals for sending IS-IS hello and CSNP packets
Step 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
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 times the hello interval.
To specify the IS-IS hello multiplier:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. 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.
3 by default.
Configuring a DIS priority for an interface
On an IS-IS broadcast network, you must elect a router as the DIS at a routing level. You can specify a
DIS priority at a level for an interface. The greater the interface's priority, the more likely it becomes the
DIS. If multiple routers in the broadcast network have the same highest DIS priority, the router with the
highest MAC address becomes the DIS.
To specify a DIS priority for an interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A