3com S7906E Manuel De Montage

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RIPng Configuration 
When configuring RIPng, go to these sections for information you are interested in:  
 
 
The term “router” in this document refers to a router in a generic sense or a Layer 3 switch. 
EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features. 
 
Introduction to RIPng 
RIP next generation (RIPng) is an extension of RIP-2 for IPv4. Most RIP concepts are applicable in 
RIPng. 
RIPng for IPv6 has the following basic differences from RIP: 
UDP port number: RIPng uses UDP port 521 for sending and receiving routing information. 
Multicast address: RIPng uses FF02:9 as the link-local-router multicast address. 
Destination Prefix: 128-bit destination address prefix. 
Next hop: 128-bit IPv6 address. 
Source address: RIPng uses FE80::/10 as the link-local source address 
RIPng Working Mechanism 
RIPng is a routing protocol based on the distance vector (D-V) algorithm. RIPng uses UDP packets to 
exchange routing information through port 521.  
RIPng uses a hop count to measure the distance to a destination. The hop count is referred to as metric 
or cost. The hop count from a router to a directly connected network is 0. The hop count between two 
directly connected routers is 1. When the hop count is greater than or equal to 16, the destination 
network or host is unreachable. 
By default, the routing update is sent every 30 seconds. If the router receives no routing updates from a 
neighbor within 180 seconds, the routes learned from the neighbor are considered as unreachable. 
Within another 240 seconds, if no routing update is received, the router will remove these routes from 
the routing table. 
RIPng supports split horizon and poison reverse to prevent routing loops and route redistribution.