Configuring OSPF
December 2005 © Foundry Networks, Inc. 20 - 9
Configuration Rules
• If a router is to operate as an ASBR, you must enable the ASBR capability at the system level.
• Redistribution must be enabled on routers configured to operate as ASBRs.
• All router ports must be assigned to one of the defined areas on an OSPF router. When a port is assigned to
an area, all corresponding sub-nets on that port are automatically included in the assignment.
OSPF Parameters
You can modify or set the following global and interface OSPF parameters.
Global Parameters
• Modify OSPF standard compliance setting.
• Assign an area.
• Define an area range.
• Define the area virtual link.
• Set global default metric for OSPF.
• Change the reference bandwidth for the default cost of OSPF interfaces.
• Disable or re-enable load sharing.
• Enable or disable default-information-originate.
• Modify Shortest Path First (SPF) timers
• Define external route summarization
• Define redistribution metric type.
• Define deny redistribution.
• Define permit redistribution.
• Enable redistribution.
• Change the LSA pacing interval.
• Modify OSPF Traps generated.
• Modify database overflow interval.
Interface Parameters
• Assign interfaces to an area.
• Define the authentication key for the interface.
• Change the authentication-change interval
• Modify the cost for a link.
• Modify the dead interval.
• Modify MD5 authentication key parameters.
• Modify the priority of the interface.
• Modify the retransmit interval for the interface.
• Modify the transit delay of the interface.
NOTE: When using the CLI, you set global level parameters at the OSPF CONFIG Level of the CLI. To reach
that level, enter router ospf… at the global CONFIG Level. Interface parameters for OSPF are set at the interface
CONFIG Level using the CLI command, ip ospf…
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