Operation Manual – Routing ProtocolH3C S7500 Series Ethernet Switches Chapter 5 IS-IS Configuration5-135.3.10 Configuring Route SummarizationYou can configure the routes having the same IP prefix as one summarized route.Follow these steps to configure route summarization:To do... Use the command... RemarksEnter system view system-view —Enter IS-IS view isis [ tag ] —Configure routesummarizationsummary ip-addressip-mask [ level-1 |level-1-2 | level-2 ]RequiredBy default, the systemperforms no routesummarization.5.3.11 Configuring Default Route GenerationIn an IS-IS routing domain, a Level-1 router maintains the LSDB for the local area onlyand generates the routes within the local area only. A Level-2 router maintains theLSDB for the backbone within the IS-IS routing domain and generates the routes forthe backbone only. To transfer packets to another area, a Level-1 router in an areaneeds to first transfer the packets to the nearest Level-1-2 router within the local area.This requires the default route at Level-1.Follow these steps to configure default route generation:To do... Use the command... RemarksEnter system view system-view —Enter IS-IS view isis [ tag ] —Configure default routegenerationdefault-route-advertise[ route-policyroute-policy-name ]RequiredThe default route isadvertised to only therouters at the same level.5.3.12 Configuring Protocol PriorityFor a router running multiple routing protocols, routing information needs to be sharedand selected by the routing protocols. The system assigns a priority for each routingprotocol. When multiple routing protocols discover a route to the same destination,the protocol with the highest priority will dominate.Follow these steps to configure protocol priority:
