H3C Technologies H3C S12500-X Series Switches - Manual (Page 152)

138
269B
Specifying the interval for sending IS-IS hello packets
If a neighbor does not receive any 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 interval for sending hello 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 [ level-1 |
level-2 ]
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.
270B
Specifying the IS-IS hello multiplier
The hello multiplier is the number of hello packets a neighbor must miss before it declares that the router
is down.
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:
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 hello multiplier.
isis timer holding-multiplier value
[ level-1 | level-2 ] The default setting is
3.
271B
Specifying the interval for sending IS-IS CSNP packets
On a broadcast network, perform this task on the DIS that uses CSNP packets to synchronize LSDBs.
To specify the interval for sending IS-IS CSNP packets: