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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 35 Configuring IP Unicast Routing
Configuring OSPF
Note OSPF classifies different media into broadcast, nonbroadcast multiaccess (NBMA), or point-to-point
networks. Broadcast and nonbroadcast networks can also be configured as point-to-multipoint networks.
The switch supports all these network types.
The Cisco implementation conforms to the OSPF Version 2 specifications with these key features:
• Definition of stub areas is supported.
• Routes learned through any IP routing protocol can be redistributed into another IP routing protocol.
At the intradomain level, this means that OSPF can import routes learned through EIGRP and RIP.
OSPF routes can also be exported into RIP.
• Plain text and MD5 authentication among neighboring routers within an area is supported.
• Configurable routing interface parameters include interface output cost, retransmission interval,
interface transmit delay, router priority, router dead and hello intervals, and authentication key.
• Virtual links are supported.
• Not-so-stubby-areas (NSSAs) per RFC 1587are supported.
OSPF typically requires coordination among many internal routers, area border routers (ABRs)
connected to multiple areas, and autonomous system boundary routers (ASBRs). The minimum
configuration would use all default parameter values, no authentication, and interfaces assigned to areas.
If you customize your environment, you must ensure coordinated configuration of all routers.
These sections contain this configuration information:
• Default OSPF Configuration, page 35-24
• Nonstop Forwarding Awareness, page 35-25
• Configuring OSPF Interfaces, page 35-26
• Configuring OSPF Network Types, page 35-27
• Configuring OSPF Area Parameters, page 35-29
• Configuring Other OSPF Parameters, page 35-31
• Changing LSA Group Pacing, page 35-32
• Configuring a Loopback Interface, page 35-33
• Monitoring OSPF, page 35-34
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