From: Simon Baxter (Simon.Baxter@xxxxxxxxxxxxxx)
Date: Mon Aug 28 2000 - 19:07:18 GMT-3
I stand corrected..
-----Original Message-----
From: Kevin M. Woods [mailto:kev@nil.org]
Sent: Friday, August 25, 2000 1:25 PM
To: Simon Baxter
Cc: Timur.Mirza@Notes.airtouch.com; ccielab@groupstudy.com
Subject: Re: which one of halabi's statements is correct?
I would have to disagree. From the OSPF specifications:
Both Type 1 and Type 2 external metrics can be present in the AS
at the same time. In that event, Type 1 external metrics always
take precedence.
So your second scenario would violate the OSPF standard.
Routes are chosen first by: O < IA < E1 < E2. Then cost is compared
which means an E1 will always win over an E2.
Kevin
// Yes, the second one.
//
// If there's two routes to the same (remote) destination, one a type1 and
the
// other a type2 (and they have different forward metrics) they type 1 will
be
// preferred because it is also indicating the intra-AS cost to the route.
The
// type 2 is only carrying the inter-AS cost.
//
// If there's 2 routes: a type1 and a type2 and the metric's the same (ie
both
// sources of the routes must be the same ASBR) then the type 2 route will
be
// preferred.
//
//
// (I'm happy for anyone to jump in here and tell me I'm wrong!!)
//
//
// Simon
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