OSPFv3
• OSPFv3 overview.......................................................................................................................................................................................... 291
• LSA types for OSPFv3................................................................................................................................................................................291
• Conguring 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 oods 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 prexes.
• Ability to congure several IPv6 addresses on a device interface. (While OSPFv2 runs per IP subnet, OSPFv3 runs per link. In
general, you can congure 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 prexes congured 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 conguration of OSPFv2 features will not aect the conguration of OSPFv3
features and vice versa.
NOTE
You are required to congure 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-prex LSAs for ABRs (Type 3)
• Interarea-router LSAs for ASBRs (Type 4)
FastIron Ethernet Switch Layer 3 Routing
53-1003627-04 291
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