3Com Switch 8800 Configuration Guide
Chapter 20 Integrated IS-IS Configuration
20-16
Perform the following configuration in interface view.
Table 20-16
Set the Hello packet broadcast interval
Operation
Command
Set Hello packet interval, measured in
seconds.
isis timer hello seconds
[
level-1
|
level-2
]
Restore the default Hello packet interval
on the interface
undo isis timer hello
[
level-1
|
level-2
]
Usually, on the broadcast links, there exist level-1 and level-2 hello packets. For
different packets, different broadcast intervals should be set. However, there are two
exceptions. One is when there is no level separation in the link, parameters of level-1
and level-2 need not be specified in the command (adopt the default values). So the
system will set the broadcast intervals of all packets as that of the level-1 hello packet.
The other is if hello packets are not separated according to level-1 and level-2 on the
p2p
links, the attribute of the packets need not be set either.
By default, Hello packets are transmitted on an interface every 10 seconds.
II. Setting the CSNP packet broadcast interval
The CSNP packet is transmitted by the DIS over the broadcast network to synchronize
the link state database (LSDB). The CSNP packet is regularly broadcast over the
broadcast network at an interval, which can be set by users.
Perform the following configuration in interface view.
Table 20-17
Set the CSNP packet broadcast interval
Operation
Command
Set the CSNP packet broadcast interval,
measured in seconds
isis timer csnp seconds
[
level-1
|
level-2
]
Restore the default CSNP packet
broadcast interval on the interface
undo isis timer csnp
[
level-1
|
level-2
]
If the level is not specified, it defaults to setting CSNP packet broadcast interval for
Level-1.
By default, the CSNP packet is transmitted via interface every 10 seconds.
III. Setting the LSP packet transmission interval
LSP carries the link state records for propagation throughout the area.
Perform the following configuration in interface view.
