3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 4 Integrated IS-IS Configuration Commands
4-35
level-1-2: Specifies to summarize all the routes imported to level-1 area and
backbone area.
level-2: Specifies to summarize only the routes imported to backbone area.
If none of the level-1 keyword, level-2 keyword, and level-1-2 keyword is specified,
the routes imported to backbone area are summarized.
Description
Use the summary command to configure IS-IS to generate summarized routes.
Use the undo summary command to disable summary.
No route is summarized by default.
You can summarize the routes having the same next hop into one to reduce the
routing table size, as well as the LSP and LSDB generated by the router. It is possible
to summarize native IS-IS routes and imported routes. After summarization, the route
cost is the minimum cost of those summarized routes.
Example
# Set an aggregate route 202.0.0.0/8.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] isis
[3Com-isis] summary 202.0.0.0 255.0.0.0
4.1.41 timer lsp-max-age Syntax
timer lsp-max-age seconds
undo timer lsp-max-age
View
IS-IS view
Parameter
seconds: Maximum valid time of a LSP, in the range of 1 to 65,535 in seconds. It is
1,200 seconds by default.
Description
Use the timer lsp-max-age command to set the maximum valid time of the LSPs
generated on the current router.
Use the undo timer lsp-max-age command to restore the default setting.