Ospfv3; Ospfv3 Overview; Lsa Types For Ospfv3 - Brocade Communications Systems FastIron SX 800 Configuration Manual

OSPFv3

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OSPFv3 overview.......................................................................................................................................................................................... 291

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LSA types for OSPFv3................................................................................................................................................................................291

• Configuring OSPFv3.................................................................................................................................................................................... 292
• Displaying OSPFv3 information.............................................................................................................................................................. 319
• OSPFv3 clear commands .........................................................................................................................................................................347
OSPFv3 overview
IPv6 supports OSPF Version 3 (OSPFv3). OSPFv3 functions similarly to OSPF Version 2 (OSPFv2), with several enhancements.
Open Shortest Path First (OSPF) is a link-state routing protocol. OSPF uses link-state advertisements (LSAs) to update neighboring
routers about its interfaces and information on those interfaces. A device floods LSAs to all neighboring routers to update them about the
interfaces. Each router maintains an identical database that describes its area topology to help a router determine the shortest path
between it and any neighboring router.
IPv6 supports OSPF Version 3 (OSPFv3), which functions similarly to OSPF Version 2 (OSPFv2), the version that IPv4 supports,
except for the following enhancements:
• Support for IPv6 addresses and prefixes.
• Ability to configure several IPv6 addresses on a device interface. (While OSPFv2 runs per IP subnet, OSPFv3 runs per link. In
general, you can configure several IPv6 addresses on a router interface, but OSPFv3 forms one adjacency per interface only,
using the interface associated link-local address as the source for OSPF protocol packets. On virtual links, OSPFv3 uses the
global IP address as the source. OSPFv3 imports all or none of the address prefixes configured on a router interface. You
cannot select the addresses to import.)
• Ability to run one instance of OSPFv2 and one instance of OSPFv3 concurrently on a link.
• Support for IPv6 link-state advertisements (LSAs).
NOTE
Although OSPFv2 and OSPFv3 function in a similar manner, Brocade has implemented the user interface for each version
independently of the other. Therefore, any configuration of OSPFv2 features will not affect the configuration of OSPFv3
features and vice versa.
NOTE
You are required to configure a router ID when running only IPv6 routing
protocols.
LSA types for OSPFv3
Communication among OSPFv3 areas is provided by means of link state advertisements (LSAs). OSPFv3 supports a number of types
of LSAs.
• Router LSAs (Type 1)
• Network LSAs (Type 2)
• Interarea-prefix LSAs for ABRs (Type 3)
• Interarea-router LSAs for ASBRs (Type 4)
FastIron Ethernet Switch Layer 3 Routing
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