Enterasys Networks 9034313-07 Area range, External inter‐, Area intra‐area, Intra‐area routes

area range

Parameters

external inter‐	Applies the distance value to external (type 5 and type 7), to inter‐area, or to
area intra‐area	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.

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 SecureStack 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.

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

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. Each SecureStack C3 stack can support up to 4 OSPF areas. The no form of this command stops the routes from being summarized.

Syntax

area area-idrange ip-addressip-mask[advertise no-advertise]no area area-idrange ip-addressip-mask

SecureStack C3 Configuration Guide 20-21