H3C Technologies H3C SR8800 - Manual (Page 175)

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Step Command Remarks
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:
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
NOTE:
On a broadcast link, Level-1 and Level-2 hello packets are advertised separately; therefore, you need to
set a hello multiplier for each level. On a P2P link, Level-1 and Level-2 hello packets are advertised in P2P
hello packets, and you do not need to specify Level-1 or Level-2.
Configuring a DIS priority for an interface
On an IS-IS broadcast network, a router should be elected 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 is, 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