D-Link DGS-6600-48TS Configuration Guide - Page 263

Volume 4-Layer 3 Configurations / Chapter 27-Routing Information Protocol Next Generation (RIPng) Chapter Overview Interface Manager • monitors the state of the interfaces and updates routes accordingly • adds connected routes into the RIP routing table • provides the Interface Configuration MIB • records per-interface and per-peer statistics and presents these in the Interface Statistics and Peer MIBs Sockets Manager • sends and receives RIPng protocol messages (Requests and Responses) • adds routes learnt from the RIPng protocol into the routing table • carries out packet verification • calls customized functions for applying policy on incoming or outgoing routes • configures UDP sockets for use Redistribution Manager • communicates with one or more instances across the RPI interface, and sends and receives all RPI messages • adds redistributed routes into the RIP routing table Distance-Vector Algorithm RIPng uses a simple mechanism to determine the metric of a route, by counting the number of routers to the destination, each router counts as one hop. Routes with a distance greater than or equal to 16 hops are considered to be unreachable. The router periodically distributes information about its routes to its directly connected neighbors using RIPng response messages. Upon receiving RIPng response messages from its neighbor, the router adds the distance between the neighbor and itself to the metric of each route received. The router then processes the newly received route entry using the Bellman-Ford algorithm (below). DGS-6600 Configuration Guide 263