1086 CHAPTER 74: IS-IS CONFIGURATION COMMANDSParameters seconds: Specifies the LSP refresh interval in seconds, ranging from 1 to 65534.Description Use the timer lsp-refresh command to set the LSP refresh interval.Use the undo timer lsp-refresh to restore the default.The default is 900 seconds.Using this feature, you can keep LSPs in synchronization for the whole area.Related commands: timer lsp-max-age.n To refresh LSPs before they are aged out, the interval set by the timer lsp-refreshcommand must be smaller than that set by the timer lsp-max-age command.Examples # Set the LSP refresh interval to 1500 seconds. system-view[Sysname] isis[Sysname-isis-1] timer lsp-refresh 1500timer spfSyntax timer spf maximum-interval [ minimum-interval [ incremental-interval ] ]undo timer spfView IS-IS viewParameters maximum-interval: Specifies the maximum interval (in seconds) for SPFcalculations, ranging from 1 to 120.minimum-interval: Specifies the minimum interval (in milliseconds) for SPFcalculations, ranging from 10 to 60000.incremental-interval: Specifies the incremental interval (in milliseconds) for SPFcalculations, ranging from 10 to 60000.Description Use the timer spf command to set the time intervals for ISIS routing calculation.Use the undo timer spf command to restore the default.The default IS-IS SPF calculation interval is 10 seconds.When the network changes are infrequent, the SPF calculation interval decreasesto the minimum interval. When the network changes become frequent, thecalculation interval is increased by inc-interval*(2n-2 ), (n is the number of networkchanges that triggered SPF calculations) until the maximum interval is reached.With this feature, you can prevent the router from over consumption due tofrequent network changes.
