Operation Manual – IPv6 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 3 IPv6 OSPFv3 Configuration
3-2
Figure 3-1
OSPFv3 packet header
Major fields:
z
Version #: Version of OSPF, which is 3 for OSPFv3.
z
Type: Type of OSPF packet, from 1 to 5 are hello, DD, LSR, LSU, and LSAck
respectively.
z
Packet Length: Packet length in bytes, including header.
z
Instance ID: Instance ID for a link.
z
0: Reserved, which must be 0.
3.1.3 OSPFv3 LSA Types
OSPFv3 sends routing information in LSAs, which as defined in RFC2740 have the
following types:
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Router-LSAs: Originated by all routers. This LSA describes the collected states of
the router's interfaces to an area. Flooded throughout a single area only.
z
Network-LSAs: Originated for broadcast and NBMA networks by the Designated
Router. This LSA contains the list of routers connected to the network. Flooded
throughout a single area only.
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Inter-Area-Prefix-LSAs: Similar to Type 3 LSA of OSPFv2, originated by ABRs
(Area Border Routers), and flooded throughout the LSA's associated area. Each
Inter-Area-Prefix-LSA describes a route with IPv6 address prefix to a destination
outside the area, yet still inside the AS (an inter-area route).
z
Inter-Area-Router-LSAs: Similar to Type 4 LSA of OSPFv2, originated by ABRs
and flooded throughout the LSA's associated area. Each Inter-Area-Router-LSA
describes a route to ASBR (Autonomous System Boundary Router).
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AS-external-LSAs: Originated by ASBRs, and flooded throughout the AS (except
Stub and NSSA areas). Each AS-external-LSA describes a route to another
Autonomous System. A default route can be described by an AS external LSA.
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Link-LSAs: A router originates a separate Link-LSA for each attached link.
Link-LSAs have link-local flooding scope. Each Link-LSA describes the IPv6
address prefix of the link and Link-local address of the router.
z
Intra-Area-Prefix-LSAs: Each Intra-Area-Prefix-LSA contains IPv6 prefix
information on a router, stub area or transit area information, and has area
flooding scope. It was introduced because Router-LSAs and Network-LSAs
contain no address information now.
