Ospfv3 Lsa Types; Timers Of Ospfv3 - HP 4800G Series Configuration Manual

Figure 1-1 OSPFv3 packet header
Major fields:
Version #: Version of OSPF, which is 3 for OSPFv3.
Type: Type of OSPF packet; Types 1 to 5 are hello, DD, LSR, LSU, and LSAck respectively.
Packet Length: Packet length in bytes, including header.
Instance ID: Instance ID for a link.
0: Reserved. It must be 0.

OSPFv3 LSA Types

OSPFv3 sends routing information in LSAs, which as defined in RFC2740 have the following types:
Router-LSA: Originated by all routers. This LSA describes the collected states of the router's
interfaces to an area. Flooded throughout a single area only.
Network-LSA: 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.
Inter-Area-Prefix-LSA: 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).
Inter-Area-Router-LSA: 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).
AS-external-LSA: 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.
Link-LSA: 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.
Intra-Area-Prefix-LSA: 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.
RFC 5187 defines the Type 11 LSA, Grace-LSA. A Grace-LSA is generated by a GR (Graceful
Restart) Restarter at reboot and transmitted on the local link. The restarter describes the cause and
interval of the reboot in the Grace-LSA to tell its neighbors that it performs a GR operation.

Timers of OSPFv3

Timers in OSPFv3 include:
OSPFv3 packet timer
LSA delay timer
1-2