Integrated IS-IS Configuration Commands 493level-2: Summarizes the routes imported into backbone area.DescriptionUse 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. Inthis way, the sizes of the routing table, LSP packets and LSDB are reduced. Amongthem, the summarized route can be either a route found by IS-IS protocol, or animported route. Furthermore, the cost value of the summarized route adopts thesmallest cost among all the routes summarized.Example# Set a summarized route of 202.0.0.0/8.[3Com-isis] summary 202.0.0.0 255.0.0.0timer lsp-max-age Syntaxtimer lsp-max-age secondsundo timer lsp-max-ageViewIS-IS viewParameterseconds: Specifies the maximum lifetime of LSP, measured in seconds. The range is1 to 65535. The default value is 1200 seconds.DescriptionUse the timer lsp-max-age command to configure the maximum lifetime of anLSP 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 toit. When other routers receive this LSP, the lifetime of the LSP decreasescontinuously as time goes by. When this value reaches zero, the LSP times out. Ifno 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 1500timer lsp-refresh Syntaxtimer lsp-refresh seconds
