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Rip message format, Ripv1 message format, Ripv2 message format – H3C Technologies H3C SecPath F1000-E User Manual

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NOTE:

RIPv2 has two types of message transmission: broadcast and multicast. Multicast is the default type using
224.0.0.9 as the multicast address. The interface working in the RIPv2 broadcast mode can also receive

RIPv1 messages.

RIP Message Format

A RIP message consists of a header and up to 25 route entries. (A RIPv2 authentication message uses the

first route entry as the authentication entry, so it has up to 24 route entries.)

Figure 1

shows the format of RIPv1 message.

RIPv1 message format

Figure 1 RIPv1 Message Format

Command: Type of message. 1 indicates a request, which is used to request all or part of the
routing information from the neighbor, and 2 indicates a response, which contains all or part of the

routing information. A response message consists of up to 25 route entries.

Version: Version of RIP, 0x01 for RIPv1.

AFI: Address Family Identifier, 2 for IP, and 0 for request messages.

IP Address: Destination IP address of the route. It can be a natural network, subnet or a host
address.

Metric: Cost of the route, 16 for request messages.

RIPv2 message format

The format of RIPv2 message is similar to RIPv1.

Figure 2

shows it.

Figure 2 RIPv2 Message Format


The differences from RIPv1 are stated as following.

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