From: Nick (seajay76@nate.com)
Date: Thu Jan 19 2006 - 05:44:54 GMT-3
Hi, Ajaz!!
I had a very similar thought and tested it on the lab.
Here are cases.
(1) There is one ASBR, a router has multiple paths to the ASBR
+------Path1:100M------+
| |
ROUTER ASBR(((NETWORK)))
| |
+------Path2:10M-------+
When a network has been redistributed as type-1
: The router will compare the cost to the network.
It will prefer Path1(w/ the lowest cost to the network).
When a network has been redistributed as type-2
: Since the costs the network are same, the router will compare the FORWARD METRIC.
It will prefer Path1(w/ the lowest FORWARD METRIC).
Forward metric is the cost to the ASBR and can be seen using sh ip route x.x.x.x command.
(2) There are two ASBRs, a router has paths for each ASBR.
+------Path1:100M------ASBR+
| |
ROUTER +(((NETWORK)))
| |
+------Path2:10M-------ASBR+
When a network has been redistributed as type-1
: The router will compare the cost to the network.
It will prefer Path1(w/ the lowest cost to the network).
When a network has been redistributed as type-2
: The router will compare the cost to the network.
Since the costs are same for the two paths, it will use Path1&Path2.
HTH
----- Original Message -----
From: "ajaz nawaz" <ajaz.nawaz@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>
Sent: Thursday, January 19, 2006 5:03 PM
Subject: ospf metric-type1 or 2type
> When redistributing any external source into ospf - i prefer using type-1
> because of the cumulative cost. Is this generally best practice?, or what
> situations would lean me towards electing to go for type-2 ?
>
> another qtn. When redistributing eigrp into opsf, does ospf look at
> something other than the RT for eigrp networks?
>
> tia
> --
> Ajaz Nawaz
>
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