R0106-HP MSR Router Series Layer 3 - IP Routing Command Reference(V7)

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Usage guidelines
If no level is specified, the CSNP interval applies to both Level-1 and Level-2.
This command only applies to the DIS of a broadcast network, which sends CSNP packets periodically
for LSDB synchronization.
Examples
# Configure Level-2 CSNP packets to be sent every 15 seconds over GigabitEthernet 2/1/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/1/1
[Sysname-GigabitEthernet2/1/1] isis timer csnp 15 level-2
isis timer hello
Use isis timer hello to specify the interval for sending hello packets.
Use undo isis timer hello to remove the configuration.
Syntax
isis timer hello seconds [ level-1 | level-2 ]
undo isis timer hello [ level-1 | level-2 ]
Default
The default hello interval is 10 seconds.
Views
Interface view
Predefined user roles
network-admin
Parameters
seconds: Specifies the interval in seconds for sending hello packets, in the range of 3 to 255.
level-1: Specifies the interval for sending Level-1 hello packets.
level-2: Specifies the interval for sending Level-2 hello packets.
Usage guidelines
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.
Level-1 and Level-2 hello packets are sent independently on a broadcast network, so you need to specify
an interval for each level. On a P2P link, Level-1 and Level-2 packets are both sent in P2P hello packets,
and you need not specify an interval for each level.
You can configure keywords level-1 and level-2 only on broadcast interfaces. Before you do that, enable
IS-IS on the interface.
The shorter the interval, the more system resources will be occupied. Configure a proper interval as
needed.
If no level is specified, the hello interval applies to both Level-1 and Level-2.