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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 32 Configuring IP Unicast Routing
Configuring OSPF
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 32-24
• Configuring Basic OSPF Parameters, page 32-26
• Configuring OSPF Interfaces, page 32-26
• Configuring OSPF Area Parameters, page 32-27
• Configuring Other OSPF Parameters, page 32-29
• Changing LSA Group Pacing, page 32-30
• Configuring a Loopback Interface, page 32-31
• Monitoring OSPF, page 32-31
Default OSPF Configuration
Table 32-5 shows the default OSPF configuration.
Table 32-5 Default OSPF Configuration
Feature Default Setting
Interface parameters Cost: No default cost predefined.
Retransmit interval: 5 seconds.
Transmit delay: 1 second.
Priority: 1.
Hello interval: 10 seconds.
Dead interval: 4 times the hello interval.
No authentication.
No password specified.
MD5 authentication disabled.