From: Hedlund, Brad (BHedlund@xxxxxxxxxxxx)
Date: Thu Mar 30 2000 - 13:59:17 GMT-3
See 'ospf reference-bandwith' ...
Brad Hedlund
Sr. Network Engineer
CCIE #5530
REAL Soultions, Elcamino Resources Ltd.
Eden Prairie, MN.
(952) 829-2877
>
> 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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