Phil,
>This behaviour seems to contraduct anything I can find in
>the Cisco documentation.
First of all, I found an interesting passage in RFC 2187 (OSPF
Version 2):
Processing of Type 2 external metrics is simpler. The AS
boundary router advertising the smallest external metric
is chosen, regardless of the internal distance to the AS
boundary router.
[...]
When several equal-cost Type 2 routes exist, the internal
distance to the advertising routers is used to break the tie.
So the behavior you experienced seems to be ok.
>into our OSPF. So he has multiple OSPF routes to our central
>core router, and these paths will have in general different
>OSPF path costs, and these costs will also change frequently
>as the network is grown. Therefore, I want to remove the
>OSPF path costs as a factor in the load sharing. I had
>thought I could do this by redistributing the customer's RIP
>routes with equal OSPF external-type 2 metrics at each POP.
If I understood you right, you would like to see your customer
connections with equal metric paths from each of your routers.
I think this makes no sense, because it would lead to some
nice routing loops. Traffic arriving at a router would be sent
on via the different paths, which means that a part of this
traffic would be sent back via the receiving path.
Regards,
Roger
BTW: something wrong with your return key??
Roger Gottsponer gottsponer@switch.ch
SWITCHlan +41 1 268'15'34
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