3com 8807 Guia De Referência
Integrated IS-IS Configuration Commands
483
isis timer
holding-multiplier
Syntax
isis timer holding-multiplier value [ level-1 | level-2 ]
undo isis timer holding-multiplier [ level-1 | level-2 ]
View
Interface view
Parameter
value: Number of consecutive Hello packets that haven’t been received from the
IS-IS neighbor for it to be considered dead. It ranges from 3 to 1000.
IS-IS neighbor for it to be considered dead. It ranges from 3 to 1000.
level-1: Level-1 IS-IS neighbor.
level-2: Level-2 IS-IS neighbor.
If you do not specify Level-1 or Level-2, the command applies to both Level-1 and
Level-2 IS-IS neighbors.
Level-2 IS-IS neighbors.
Description
Use the isis timer holding-multiplier command to set the number of
consecutive Hello packets that haven’t been received from the IS-IS neighbor for it
to be considered dead.
consecutive Hello packets that haven’t been received from the IS-IS neighbor for it
to be considered dead.
Use the undo isis timer holding-multiplier command to restore the default
setting.
setting.
By default, an IS-IS neighbor is considered dead if three consecutive Hello packets
haven’t been received from it.
haven’t been received from it.
Given a broadcast network, you may configure this command specific to Level-1
or Level-2 neighbors by specifying the keyword level-1 or level-2.
or Level-2 neighbors by specifying the keyword level-1 or level-2.
Given a PPP link, you do not need to specify Level-1 or Level-2, because only one
kind of Hello packet is available.
kind of Hello packet is available.
This command virtually specifies a hold-down time. If the local router does not
receive any Hello packet from the peer within this time, the peer is considered
dead.
receive any Hello packet from the peer within this time, the peer is considered
dead.
The hold-down time is configured on a per-interface basis. Within one area,
routers may have different holddown time settings.
routers may have different holddown time settings.
To tune the hold-down time on a router, change the Hello timer setting of IS-IS or
change the number of consecutive Hello packets that haven’t been received from
an IS-IS neighbor for it to be considered dead.
change the number of consecutive Hello packets that haven’t been received from
an IS-IS neighbor for it to be considered dead.
Related command: isis timer hello.
Example
# On Vlan-interface 10, configure that the IS-IS neighbor is considered dead if five
consecutive Hello packets haven’t been received from it.
consecutive Hello packets haven’t been received from it.