3com S7906E Manuel De Montage

 

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Each RIPng router maintains a routing database, including route entries of all reachable destinations. A 

route entry contains the following information: 

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Destination address: IPv6 address of a host or a network. 

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Next hop address: IPv6 address of a neighbor along the path to the destination. 

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Egress interface: Outbound interface that forwards IPv6 packets. 

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Metric: Cost from the local router to the destination. 

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Route time: Time that elapsed since a route entry is last changed. Each time a route entry is 

modified, the routing time is set to 0. 

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Route tag: Identifies the route, used in a routing policy to control routing information. For 

information about routing policy, refer to Routing Policy Configuration in the IP Routing Volume. 

A RIPng packet consists of a header and multiple route table entries (RTEs). The maximum number of 

RTEs in a packet depends on the IPv6 MTU of the sending interface. 

 shows the packet format of RIPng. 

Figure 1-1 RIPng basic packet format 

 

 

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Command: Type of message. 0x01 indicates Request, 0x02 indicates Response. 

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Version: Version of RIPng. It can only be 0x01 currently. 

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RTE: Route table entry, 20 bytes for each entry. 

There are two types of RTEs in RIPng. 

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Next hop RTE: Defines the IPv6 address of a next hop 

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IPv6 prefix RTE: Describes the destination IPv6 address, route tag, prefix length and metric in the 

RIPng routing table. 

 shows the format of the next hop RTE: 

Figure 1-2 Next hop RTE format 

 

 

IPv6 next hop address is the IPv6 address of the next hop. 

 shows the format of the IPv6 prefix RTE.