Re: ABR

From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Sun Sep 26 2004 - 08:45:02 GMT-3


A litle more detailed situation would help...
OSPF supports internal and external routes.
All have cost associated, but cost is not the most important factor.

You have external type 1 and type 2.
Type 2 cost is fixed at ASBR, type 1 is "compatible" with internal cost
and incremented along the OSPF path.
You have 2 internal types, intra-area and inter-area.

1st choice is intra-area
2nd choice is inter-area
3rd choice is external type 1
4th choice is external type 2

and within each, cost is the selection factor.

Tomasz Siwiarek wrote:

> I have question, why ABR in OSPF prefer routes from area 0 not from
> are x - is this any feature in OSPF, both areas have connection to
> ISIS.
>
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-- 
Carlos G Mendioroz  <tron@huapi.ba.ar>  LW7 EQI  Argentina


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