H3C Technologies H3C S10500 Series Switches - Manual (Page 171)

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To do… Use the command… Remarks
Specify the interval for sending
hello packets isis timer hello seconds [ level-1 |
level-2 ] Optional
10 seconds by default
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.
Follow these steps to specify the IS-IS hello multiplier:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
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, so you do not need to specify Level-1 or Level-2.
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.
Follow these steps to specify a DIS priority for an interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Specify a DIS priority for the
interface isis dis-priority value [ level-1 |
level-2 ]
Optional
64 by default