3Com Switch 8807, Command Reference Manual

Page: 495 / 1099

Integrated IS-IS Configuration Commands 493
level-2 : Summarizes the routes imported into backbone area.
Description
Use the summary command to configure to summarize IS-IS routes.
Use the undo summary command to cancel the summarization.
By default, no routes will be summarized.
Similarly, the routes with the same next hops can be summarized into one route. In
this way, the sizes of the routing table, LSP packets and LSDB are reduced. Among
them, the summarized route can be either a route found by IS-IS protocol, or an
imported route. Furthermore, the cost value of the summarized route adopts the
smallest cost among all the routes summarized.
Example
# Set a summarized route of 202.0.0.0/8.
[3Com-isis] summary 202.0.0.0 255.0.0.0
timer lsp-max-age Syntax
timer lsp-max-age second s
undo timer lsp-max-age
View
IS-IS view
Parameter
seconds : Specifies the maximum lifetime of LSP, measured in seconds. The range is
1 to 65535. The default value is 1200 seconds.
Description
Use the timer lsp-max-age command to configure the maximum lifetime of an
LSP generated by the current router.
Use the undo timer lsp-max-age command to restore the default value.
When the router generates an LSP for the system, it adds the maximum lifetime to
it. When other routers receive this LSP, the lifetime of the LSP decreases
continuously as time goes by. When this value reaches zero, the LSP times out. If
no update is received before that, the timeout LSP will be deleted from the LSDB.
Related command: timer lsp-refresh .
Example
# Set the lifetime of an LSP generated by the current system to 25 minutes, i.e.,
1500 seconds.
[3Com-isis] timer lsp-max-age 1500
timer lsp-refresh Syntax
timer lsp-refresh second s