Table 24 Global Settings for OSPF

Parameter

Description

 

 

RFC1583

This implementation of OSPF is based on RFC2178, which fixed some looping

Compatibility

problems in an earlier specification of OSPF. If your implementation is running in an

 

environment with OSPF implementations based on RFC1583 or earlier, enable RFC

 

1583 compatibility to ensure backwards compatibility.

SPF Delay

Specifies the time in seconds the system will wait to recalculate the OSPF routing

 

table after a change in topology. Default is 2. Range is 1-60.

SPF Hold

Specifies the minimum time in seconds between recalculations of the OSPF routing

 

table. Default is 5. Range is 1-60.

Default ASE

Specifies a cost for routes redistributed into OSPF as ASEs. Any cost previously

Route Cost

assigned to a redistributed routed overrides this value.

Default ASE

Specifies a route type for routes redistributed into OSPF as ASEs, unless these routes

Route Type

already have a type assigned.

 

There are two types:

 

Type 1 external: Used for routes imported into OSPF which are from IGPs whose

 

 

metrics are directly comparable to OSPF metrics. When a routing decision is being

 

 

made, OSPF adds the internal cost to the AS border router to the external metric.

 

Type 2 external: Used for routes whose metrics are not comparable to OSPF

 

 

internal metrics. In this case, only the external OSPF cost is used. In the event of

 

 

ties, the least cost to an AS border router is used.

 

 

 

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