Operation Manual – IPv4 RoutingH3C S5500-EI Series Ethernet Switches Chapter 6 Routing Policy Configuration6-1Chapter 6 Routing Policy ConfigurationNote:The term “router” refers to a router in a generic sense or a Layer 3 switch runningrouting protocols.A routing policy is used on a router for route inspection, filtering, attributes modificationwhen routes are received, advertised, or redistributed.When configuring routing policy, go to these sections for information you are interestedin:z Introduction to Routing Policyz Routing Policy Configuration Task Listz Defining Filtering Listsz Configuring a Routing Policyz Displaying and Maintaining the Routing Policyz Routing Policy Configuration Examplez Troubleshooting Routing Policy ConfigurationNote:Routing policy described in this chapter includes both IPv4 routing policy and IPv6routing policy. Configurations of the two are similar, and differences are described inrelated sections.6.1 Introduction to Routing Policy6.1.1 Routing Policy and Policy RoutingA routing policy is used on the router for route inspection, filtering, attributes modifyingwhen routes are received, advertised, or redistributed.Policy routing is a routing mechanism based on the user-defined policies.This chapter describes only routing policy configuration and usage, refer to IP UnicastPolicy Routing Configuration in the IP Services Volume for policy routing information.