H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv6 Routing
H3C S7500E Series Ethernet Switches Chapter 2 IPv6 RIPng Configuration
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z Destination address: IPv6 address of a host or a network.
z Next hop address: IPv6 address of a neighbor along the path to the destination.
z Egress interface: Outbound interface that forwards IPv6 packets.
z Metric: Cost from the local router to the destination.
z 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.
z Route tag: Identifies the route, used in routing policy to control routing information.
2.1.2 RIPng Packet Format
I. 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 2-1 shows the packet format of RIPng.
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Figure 2-1 RIPng basic packet format
z Command: Type of message. 0x01 indicates Request, 0x02 indicates Response.
z Version: Version of RIPng. It can only be 0x01 currently.
z RTE: Route table entry, 20 bytes for each entry.
II. RTE format
There are two types of RTE in RIPng.
z Next hop RTE: Defines the IPv6 address of a next hop
z IPv6 prefix RTE: Describes the destination IPv6 address, route tag, prefix length
and metric in the RIPng routing table.
Figure 2-2 shows the format of the next hop RTE:
Figure 2-2 Next hop RTE format
IPv6 next hop address is the IPv6 address of the next hop.