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7.8.1.0 - Force10 Networks

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Chapter 23<br />

Open Shortest Path First<br />

(OSPFv2 and OSPFv3)<br />

Open Shortest Path First version 2 (OSPF for IPv4) is supported on platforms c e s<br />

Open Shortest Path First version 3 (OSPF for IPv6) is supported on platforms c e<br />

This chapter is intended to provide a general description of OSPFv2 (OSPF for IPv4) and OSPFv3 (OSPF<br />

for IPv6) as supported in the Force 10 Operating System (FTOS). It is not intended to provide a complete<br />

understanding of OSPF.<br />

The Force 10 Operating System (FTOS) supports the following OSPF RFCs:<br />

• RFC 1587 The OSPF NSSA Option<br />

• RFC 1850 OSPF Version 2 Management Information Base<br />

• RFC 2328 OSPF Version 2<br />

• RFC 2370 The OSPF Opaque LSA Option<br />

• RFC 3623 Graceful OSPF Restart<br />

The <strong>Force10</strong> <strong>Networks</strong> FTOS implementation of OSPFv3 is based on RFC 2740.<br />

Note: The fundamental mechanisms of OSPF (flooding, DR election, area support, SPF calculations, etc.)<br />

are the same between OSPFv2 and OSPFv3. Where there are differences between the two versions, they<br />

are identified and clarified. Except where identified, the information in this chapter applies to both<br />

protocol versions.<br />

This chapter includes the following topics:<br />

• Protocol Overview<br />

• Implementing OSPF with FTOS<br />

• Graceful Restart<br />

• Fast Convergence ( OSPFv2, IPv4 only)<br />

• Multi-Process OSPF (OSPFv2, IPv4 only)<br />

• RFC-2328 Compliant OSPF Flooding<br />

• OSPF ACK Packing<br />

• OSPF Adjacency with Cisco Routers<br />

• Configuration Information<br />

• Configuration Task List for OSPFv2 (OSPF for IPv4)<br />

• Configuration Task List for OSPFv3 (OSPF for IPv6)<br />

• Sample Configurations for OSPFv2<br />

FTOS Configuration Guide, version <strong>7.8.1.0</strong> 515

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