Operation Manual – IPv4 RoutingH3C S7500E Series Ethernet Switches Chapter 4 IS-IS Configuration4-23the size of routing tables, as well as the LSP and LSDB generated by the router itself.Both IS-IS and redistributed routes can be summarized.Follow these steps to configure route summarization:To do… Use the command... RemarksEnter system view system-view —Enter IS-IS view isis [ process-id ] ––Configure IS-IS routesummarizationsummary ip-address { mask |mask-length } [ avoid-feedback |generate_null0_route | tag tag |[ level-1 | level-1-2 | level-2 ] ] *RequiredNot configured bydefaultNote:The cost of the summary route is the lowest cost among those summarized routes.4.4.6 Advertising a Default RouteFollow these steps to advertise a default route:To do… Use the command… RemarksEnter system view system-view ––Enter IS-IS view isis [ process-id ] —Advertise a defaultroutedefault-route-advertise[ route-policyroute-policy-name ] [ level-1 |level-2 | level-1-2 ]OptionalLevel-2 router generatesa default route by default.Note:The default route is only advertised to routers at the same level. You can use a routingpolicy to generate the default route only when a local routing entry is matched by thepolicy.4.4.7 Configuring Inbound Route FilteringFollow these steps to configure inbound route filtering:
