From: Joel W. Ekis (jekis@xxxxxxxxx)
Date: Thu Mar 30 2000 - 14:09:47 GMT-3
use 'auto-cost reference-bandwidth <bandwidth>'
where <1-4294967> The reference bandwidth in terms of Mbits per second
This is a command under 'router ospf 1'
You need this on all routers so that they agree on the metrics.
Joel
At 05:25 PM 3/30/2000 +0100, ejobson wrote:
>I wonder if someone could help me out with this:
>
>I understand that the costs are calculated for OSPF by 100,000,000/bandwidth
>which gives a standard ethernet connection a value of 10. A fast ethernet or
>FDDI would be 1, so I guess a Gigabit link would also be 1. What attribute
>would be used by default to ensure traffic took the 1000Mbps over the
>100Mbps one, or is it just a limitation due to OSPF now being a bit dated? I
>have heard a solution for this in the past but have since forgotten it.
>
>Is it a case of manually setting the cost of all fast ethernet interfaces in
>the network to say 5, as it doesn't seem possible to have a value higher
>than 1.
>
>Also is there any chance of Gigabit being used to confuse OSPF calculations
>in the exam?
>
>Thanks.
>
>Eddie Jobson
>Internetwork Solutions Engineer
>Nevolutions UK Ltd. a division of
>Total Network Solutions Inc.
>7th Floor, Tower 42
>The International Finance Centre
>25 Old Broad Street
>London
>EC2N 1HN
>
>Office +44 (0)171 877 1992
>Fax +44 (0)171 877 1059
>Mobile +44 (0)7867 505635
>Email ejobson@tns-inc.com
>
>Website http://www.tns-inc.com
>
>
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