User's Manual

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Chapter 80 OSPFv3 Configuration
80.1 Overview
OSPFv3 is an IGP routing protocol developed by the OSPF working group of IETF for the IPv6 network.
OSPFv3 supports the IPv6 subnet, the mark of the external routing information and the packet’s authentication.
OSPFv3 and OSPFv2 have a lot in common:
 Both router ID and area ID are 32 bit.
 The following are the same type of packets: Hello packets, DD packets, LSR packets, LSU
packets and LSAck packets.
 Having the same neighbor discovery mechanism and the same neighborhood generation
mechanism
 Having the same LSA expansion mechanism and the same LSA aging mechanism
The main differences of both OSPFv3 and OSPFv2 are shown below:
 OSPFv3 is running on the basis of link, while OSPFv2 is running on the basis of network
segment.
 OSPFv3can run multiple instances on the same link.
 OSPFv3 labels its neighbor through router ID, while OSPFv2 labels its neighbor through IP.
 OSPFv3 defines 7 classes of LSAs.
The following table shows some key functions in the realization of the OSPFv3 functions.
Key attributes Description
Stub domain Supports the stub domain.
Route forwarding
Means that routes that are learned or generated by any routing protocol
can be forwarded to the domains of other routing protocols.In the
autonomous domain, it means that OSPFv3 can input the RIPng
learned routes.
The routes learned by OSPFv3 can also be exported to RIPng.Between
the autonomous domains, OSPFv3 can import the BGP-learned routes;
OSPFv3 routes can also be exported to the BGPs.
Parameters of a routing
interface
The following are configurable interface parameters: output cost,
retransmission interval, interface's transmission delay, router’s priority,
interval for judging the shutdown of a router, hello interval, and
authentication key.
Virtual link Supports the virtual link.
80.2 OSPFv3 Configuration Task List
OSPFv3 demands the switchover of routing data between in-domain router, ABR and ASBR. In order to simplify
the settings, you can make related configuration to enable them to work under the default parameters without
any authentication; if you want to change some parameters, you must guarantee that the parameters on all
routers are identical.
To set OSPFv3, you must perform the following tasks. Except that the task of activating OSPFv3 is mandatory,
other settings are optional.
 Enabling OSPFv3
 Setting the parameters of the OSPFv3 interface