BigIron RX Series Configuration Guide xxi53-1001986-01Configuring DVMRP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .643Enabling DVMRP globally and on an interface. . . . . . . . . . . . .643Modifying DVMRP global parameters . . . . . . . . . . . . . . . . . . . .643Modifying DVMRP interface parameters . . . . . . . . . . . . . . . . .646Displaying information about an upstream neighbordevice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .647Configuring a static multicast route. . . . . . . . . . . . . . . . . . . . . . . . .647Configuring IP multicast traffic reduction. . . . . . . . . . . . . . . . . . . .648Enabling IP multicast traffic reduction . . . . . . . . . . . . . . . . . . .649Layer 2 multicast filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .653PIM SM traffic snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .654Static IGMP membership. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .658Chapter 24 Configuring RIPOverview of Routing Information Protocol (RIP) . . . . . . . . . . . . . . .661Configuring RIP parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .661Enabling RIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .661Configuring metric parameters . . . . . . . . . . . . . . . . . . . . . . . . .662Changing the administrative distance . . . . . . . . . . . . . . . . . . .662Configuring redistribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . .663Configuring route learning and advertising parameters . . . . .664Changing the route loop prevention method . . . . . . . . . . . . . .665Suppressing RIP route advertisement on a VRRP or VRRPEbackup interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .666Using prefix lists and route maps as route filters . . . . . . . . . .666Setting RIP timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .667Displaying RIP filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .668Clearing the RIP routes from the routing table . . . . . . . . . . . .669Chapter 25 Configuring OSPF Version 2 (IPv4)Overview of OSPF (Open Shortest Path First) . . . . . . . . . . . . . . . . . 671Designated routers in multi-access networks . . . . . . . . . . . . .672Designated router election in multi-access networks . . . . . . .672OSPF RFC 1583 and 2328 compliance . . . . . . . . . . . . . . . . . . 674Reduction of equivalent AS external LSAs . . . . . . . . . . . . . . . . 674Support for OSPF RFC 2328 appendix E . . . . . . . . . . . . . . . . .676Dynamic OSPF activation and configuration . . . . . . . . . . . . . .677