[c-nsp] silly ospf question -- unequal cost paths

[Roland Dobbins]

Route Explorer from Packet Design does some pretty cool/useful  
visualizations based on routing information:

	http://www.packetdesign.com/products/rex.htm


On Jan 3, 2006, at 10:44 PM, Oliver Boehmer ((oboehmer)) wrote:

> Ashe Canvar <> wrote on Wednesday, January 04, 2006 2:03 AM:
>
>> I have multiple possible ospf paths between router A and B. Is there
>> any way I can see all possible paths available between A and B and
>> their respective costs.
>
> No.
>
>> Does the OSPF shortest path calculation happen from the linkstate
>> database  when the primary path fails and this is the reason that the
>> backup paths or higher cost paths cannot be displayed when they are
>> not active ?
>
> Yes, more or less. IOS doesn't display the entire active "path"  
> either,
> it just shows the next-hop along its SPF.
>
>> This is terribly confusing when trying to troubleshoot or understand
>> a topology.
>
> Well, I usually use network diagrams to understand a new topology ;-)
> I think there are tools around to create topology maps based on
> link-state databases (as all the info is in there), but I don't recall
> their names.
>
> 	oli
>
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Roland Dobbins <rdobbins at cisco.com> // 408.527.6376 voice

      Everything has been said.  But nobody listens.

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