R21xx-HP FlexFabric 11900 Layer 3 IP Routing Configuration Guide

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• Router-LSA—Originated by all routers. This LSA describes the collected states of the router's

interfaces to an area, and is flooded throughout a single area only.

• Network-LSA—Originated for broadcast and NBMA networks by the DR. This LSA contains the list

of routers connected to the network, and is flooded throughout a single area only.

• Inter-Area-Prefix-LSA—Originated by ABRs 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.

• Inter-Area-Router-LSA—Originated by ABRs and flooded throughout the LSA's associated area.

Each Inter-Area-Router-LSA describes a route to ASBR.

• 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 AS. 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.

RFC 5187 defines the 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 notify its neighbors that it performs a GR operation.

Protocols and standards

• RFC 5340, OSPF for IPv6

• RFC 2328, OSPF Version 2

• RFC 5187, OSPFv3 Graceful Restart

OSPFv3 configuration task list

Tasks at a

lance

(Required.) Enabling OSPFv3

(Optional.) Configuring OSPFv3 area parameters:

• Configuring a stub area

• Configuring an OSPFv3 virtual link

(Optional.) Configuring OSPFv3 network types:

• Configuring the OSPFv3 network type for an interface

• Configuring an NBMA or P2MP neighbor