Switch 7700 Command reference Guide, v2.0

Integrated IS-IS Configuration Commands 177
■ Use the undo isis timer csnp command to restore the default value, that is,
10 seconds.
Only DIS can periodically send CSNP packets, therefore, this command is valid only
for the router that is selected as the DIS. Furthermore, DIS is divided into level-1
and level-2, and their intervals of sending CSNP packets must be set respectively.
Example
Set the CSNP packet of Level-2 to be transmitted every 15 seconds on the
interface Vlan-interface 1.
[SW7700]interface Vlan-interface 1
[SW7700-Vlan-interface1]isis timer csnp 15 level-2
isis timer dead Syntax
isis timer dead seconds [ level-1 | level-2 ]
undo isis timer dead [ level-1 | level-2 ]
View
VLAN interface view
Parameter
seconds: Specify the Hello failure interval of IS-IS neighbor, ranging from 9 to
65535 and measured in seconds. The default value is 30 seconds.
level-1: Specify the Hello failure interval of Level-1 IS-IS neighbor.
level-2: Specify the Hello failure interval of Level-2 IS-IS neighbor.
If the level is not specified, it defaults to setting the Hello failure interval of Level-1.
Description
■ Use the isis timer dead command to configure the failure interval for
receiving Hello packets from IS-IS neighbor.
■ Use the undo isis timer dead command to restore the default setting.
For the broadcast network, you can configure the neighbor Hello failure interval of
Level-1 or Level-2 separately. However, it is not necessary for the point-to-point
link, because only one kind of Hello packet is applied.
Hello failure interval is the Holddown time. If the router has not received the Hello
packet from the peer within the Holddown time, the link between the current
router and the peer is considered invalid. The invalid number of neighboring
relation is based on the interface configuration, and the different routers in the
same area can be configured with different Holddown values.
Related command: isis timer hello.