Switch 7700 Command reference Guide, v2.0

186 CHAPTER 5: USING ROUTING PROTOCOL COMMANDS
Parameter
ip-address: Aggregated network segment address.
mask: Aggregated network mask.
level-1: Configure to aggregate the routes imported into Level-1.
level-2: Configure to aggregate the routes imported into Level-2 routing table.
level-1-2: Configure to aggregate the routes imported into Level-1 and Level-2.
Description
■ Use the summary command to configure IS-IS route summary.
■ Use the undo summary command to cancel the summary.
By default, no routes will be summarized.
Similarly, the routes with the same next hops can be aggregated into one route. In
this way, the sizes of the routing table, LSP packets and LSDB are reduced. Among
them, the aggregated route can be either a route found by IS-IS protocol, or an
imported route. Furthermore, the cost value of the aggregated route adopts the
smallest cost of the routes aggregated.
Example
Set a route summary of 202.0.0.0/8.
[SW7700-isis]summary 202.0.0.0 255.0.0.0
timer lsp-max-age Syntax
timer lsp-max-age seconds
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 decreases continuously as the
time goes. If updated LSP has not been received before the old one times out, this
LSP will be deleted from the LSDB.
Related commands: timer lsp-refresh.