H3C Technologies H3C S10500 Series Switches - Manual (Page 281)

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RIPng packet format
Basic format
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.
Figure 100 RIPng basic packet format
…
Packet header description:
• Command: Type of message. 0x01 indicates Request; 0x02 indicates Response.
• Version: Version of RIPng. It can only be 0x01.
• RTE: Route table entry. It is 20 bytes for each entry.
RTE format
The following are types of RTEs in RIPng:
• Next hop RTE—Defines the IPv6 address of a next hop
• IPv6 prefix RTE—Describes the destination IPv6 address, route tag, prefix length and metric in the
RIPng routing table.
Figure 101 Next hop RTE format
IPv6 next hop address (16 octets)
Must be zero Must be zero 0xFF
0 7 15 31
IPv6 next hop address is the IPv6 address of the next hop.
Figure 102 IPv6 prefix RTE format
IPv6 prefix (16 octets)
Route tag Prefix length Metric
0 7 15 31
IPv6 prefix RTE field description:
• IPv6 prefix—Destination IPv6 address prefix.
• Route tag—Route tag.
• Prefix len—Length of the IPv6 address prefix.
• Metric—Cost of a route.