3Com S7906E Configuration Manual page 738

To do...
Specify the maximum LSP age
2) Specify the LSP refresh interval and generation interval
Each router needs to refresh LSPs generated by itself at a configurable interval and send them to other
routers to prevent valid routes from being aged out. A smaller refresh interval speeds up network
convergence but consumes more bandwidth.
When the network topology changes, for example, a neighbor is down/up, or the interface metric,
system ID or area ID is changed, the router generates an LSP after a configurable interval. If such
changes occur frequently, excessive LSPs are generated, consuming a large amount of router
resources and bandwidth; in this case, you can adjust the LSP generation interval.
Follow these steps to specify the LSP refresh interval and generation interval:
To do...
Enter system view
Enter IS-IS view
Specify the LSP refresh
interval
Specify the LSP generation
interval
3) Specify LSP sending intervals
If a change occurs in the LSDB, IS-IS advertises the changed LSP to neighbors. You can specify the
minimum interval for sending such LSPs.
On a P2P link, IS-IS requires an advertised LSP be acknowledged. If no acknowledgement is received
within a configurable interval, IS-IS will retransmit the LSP.
Follow these steps to configure LSP sending intervals:
To do...
Enter system view
Enter interface view
Specify the minimum interval
for sending LSPs and the
maximum LSP number that can
be sent at a time
Specify the LSP retransmission
interval on a P2P link
Use the command...
timer lsp-max-age seconds
Use the command...
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
timer lsp-refresh seconds
timer lsp-generation maximum-interval
[ initial-interval [ second-wait-interval ] ]
[ level-1 | level-2 ]
Use the command...
system-view
interface interface-type
interface-number
isis timer lsp time [ count
count ]
isis timer retransmit
seconds
1-27
Remarks
Optional
1200 seconds by default
Remarks
––
––
Optional
900 seconds by
default
Optional
2 seconds by
default
Remarks
––
––
Optional
By default, the minimum interval is
33 milliseconds, and the maximum
LSP number that can be sent at a
time is 5.
Optional
5 seconds by default