distance ospf
27-12 IPv4 Advanced Routing Protocol Configuration
distance ospf
Use this command to configure the administrative distance for OSPF routes. The no form of this
command resets OSPF administrative distance to the default values.
Syntax
distance ospf {external | inter-area | intra-area} weight
no distance ospf {external | inter-area | intra-area}
Parameters
Defaults
If route type is not specified, the distance value will be applied to all OSPF routes.
Mode
Router configuration: C3(su)->router(Config-router)#
Usage
If several routes (coming from different protocols) are presented to the Enterasys C3, the protocol
with the lowest administrative distance will be chosen for route installation. By default, OSPF
administrative distance is set to 110. The distance ospf command can be used to change this value,
resetting OSPF’s route preference in relation to other routes as shown in the table below.
Example
This example shows how to change the default administrative distance for external OSPF routes to
100:
C3(su)->router(Config)#router ospf 1
C3(su)->router(Config-router)#distance ospf external 100
area range
Use this command to define the range of addresses to be used by Area Border Routers (ABRs)
when they communicate routes to other areas. Refer to the latest firmware Release Notes for the
number of OSPF areas that can be supported by the Enterasys C3. The no form of this command
stops the routes from being summarized.
external | inter-
area | intra-area
Applies the distance value to external (type 5 and type 7), to inter-area, or to
intra-area routes.
Note: The value for intra-area distance must be less than the value for inter-area
distance, which must be less than the value for external distance.
weight Specifies an administrative distance for OSPF routes. Valid values are 1 -
255.
Route Source Default Distance
Connected 0
Static 1
OSPF Intra-area - 8; Inter-area - 10; External type 1 - 13; External type 2 - 150
RIP 15
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