Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 246)

228 Brocade ICX 6650 Layer 3 Routing Configuration Guide
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Differences between OSPF V2 and OSPF V3
NOTE
The terms Layer 3 Switch and router are used interchangeably in this chapter and mean the same
thing.
Differences between OSPF V2 and OSPF V3
IPv6 supports OSPF V3 functions similarly to OSPF V2 (the current version that IPv4 supports),
except for the following enhancements:
• Support for IPv6 addresses and prefixes.
• While OSPF V2 runs per IP subnet, OSPF V3 runs per link. In general, you can configure several
IPv6 addresses on a router interface, but OSPF V3 forms one adjacency per interface only,
using the interface associated link-local address as the source for OSPF protocol packets. On
virtual links, OSPF V3 uses the global IP address as the source.
• You can run one instance of OSPF Version 2 and one instance of OSPF V3 concurrently on a
link.
• Support for IPv6 link state advertisements (LSAs).
In addition, Brocade implements some new commands that are specific to OSPF V3. This chapter
describes the commands that are specific to OSPF V3.
NOTE
Although OSPF Versions 2 and 3 function similarly to each other, Brocade has implemented the user
interface for each version independently of each other. Therefore, any configuration of OSPF Version
2 features will not affect the configuration of OSPF V3 features and vice versa.
NOTE
You are required to configure a router ID when running only IPv6 routing protocols.
Link state advertisement types for OSPF V3
OSPF V3 supports the following 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)
• Autonomous system external LSAs (Type 5)
• Link LSAs (Type 8)
• Intra-area prefix LSAs (Type 9)
For more information about these LSAs, see RFC 2740.