Chapter 29
| IP Routing Commands
Open Shortest Path First (OSPFv2)
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Example
Console(config)#router ospf
Console(config-router)#
Related Commands
network area (856)
compatible rfc1583 This command calculates summary route costs using RFC 1583 (early OSPFv2). Use
the no form to calculate costs using RFC 2328 (OSPFv2).
Syntax
[no] compatible rfc1583
Command Mode
Router Configuration
Default Setting
RFC 1583 compatible
Command Usage
â—† When RFC 1583 compatibility is enabled, only cost is used when choosing
among multiple AS-external LSAs advertising the same destination. When
disabled, preference is based on type of path (where type 1 external paths are
preferred over type 2 external paths, using cost only to break ties (RFC 2328).
â—† All routers in an OSPF routing domain should use the same RFC for calculating
summary routes.
â—† If there are any OSPF routers in an area exchanging summary information
(specifically, ABRs) which have not been upgraded to OSPFv2, this command
should be used on the newly upgraded OSPFv2 routers to ensure compatibility
with routers still running older OSPFv2 code. Once all systems have been
upgraded to newer OSPFv2 code, use the no form of this command to restore
compatibility for all systems with RFC 2328.
Example
Console(config-router)#compatible rfc1583
Console(config-router)#
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