H3C S7500E Series Operation Manual page 498

Operation Manual – IPv6 Routing
H3C S7500E Series Ethernet Switches
Chapter 3 IPv6 OSPFv3 Configuration
Note:
The term "router" in this document refers to a Layer 3 switch running routing
protocols.
At present, the LSQ1GP12EA boards in the S7500E series do not support IPv6.
3.1 Introduction to OSPFv3
3.1.1 OSPFv3 Overview
OSPFv3 is OSPF (Open Shortest Path First) version 3 for short, supporting IPv6 and
compliant with RFC2740 (OSPF for IPv6).
Identical parts between OSPFv3 and OSPFv2:
32 bits router ID and area ID
Packets: Hello, DD (Data Description), LSR (Link State Request), LSU (Link State
Update), LSAck (Link State Acknowledgment)
Mechanisms for finding neighbors and establishing adjacencies
Mechanisms for LSA flooding and aging
Differences between OSPFv3 and OSPFv2:
OSPFv3 now runs on a per-link basis, instead of on a per-IP-subnet basis.
OSPFv3 supports multiple instances per link.
OSPFv3 identifies neighbors by Router ID, while OSPFv2 by IP address.
3.1.2 OSPFv3 Packets
OSPFv3 has also five types of packets: hello, DD, LSR, LSU, and LSAck.
The five packets have the same packet header, which different from the OSPFv2
packet header is only 16 bytes in length, has no authentication field, but is added with
an Instance ID field to support multi-instance per link.
Figure 3-1 gives the OSPFv3 packet header.
Chapter 3 IPv6 OSPFv3 Configuration
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