Operation Manual – Routing ProtocolH3C S7500 Series Ethernet Switches Chapter 1 IP Routing Protocol Overview1-3Router ARouter BRouter HRouter E16.0.0.217.0.0.215.0.0.012.0.0.0 17.0.0.011.0.0.0 16.0.0.013.0.0.014.0.0.0Router CRouter DRouter FRouter G11.0.0.111.0.0.212.0.0.112.0.0.215.0.0.1 15.0.0.217.0.0.116.0.0.113.0.0.1 13.0.0.213.0.0.314.0.0.1 14.0.0.315.0.0.314.0.0.214.0.0.4Destination Network Nexthop Interface11.0.0.0 14.0.0.1 312.0.0.0 14.0.0.1 313.0.0.0 16.0.0.1 214.0.0.0 14.0.0.3 315.0.0.0 17.0.0.2 116.0.0.0 16.0.0.2 217.0.0.0 17.0.0.1 1Figure 1-1 Routing table1.2 Routing Management PolicyOn an S7500 switch, you can manually configure a static route to a certain destination,or configure a dynamic routing protocol to make the switch interact with other routersin the internetwork and find routes. On an S7500 switch, the static routes configuredby the user and the dynamic routes discovered by routing protocols are manageduniformly. The static routes and the routes learned or configured by different routingprotocols can also be shared among routing protocols.1.2.1 Routing Protocols and PreferencesDifferent routing protocols may discover different routes to the same destination, butonly one route among these routes and the static routes is optimal. In fact, at anygiven moment, only one routing protocol can determine the current route to a specificdestination. Routing protocols (including static routing) are assigned differentpreferences. When there are multiple routing information sources, the routediscovered by the routing protocol with the highest preference will become the current
