[c-nsp] dumb BGP question

[Scott Granados]

Remember that pref is non transitive.

If you could, could you do a show ip bgp prefix and paste the output?

Then we might be able to expand more.

Thanks

On Jan 31, 2012, at 3:42 PM, John Brown wrote:

> Hi,
> I'm suffering from driving spreadsheets instead of routers.
> 
> Have a customer that has two routers.
> 
> A  and B
> 
> A is connected to us
> B is connected to two other eBGP neighbors (transit providers)
> 
> A and B are connected via iBGP.
> 
> A == 7300 widget
> B === 9000 widget
> 
> Traffic via our link is nearly 100 percent ingress to their router A.
> Very little egress from A.
> 
> A is basically a router that feeds the link to us.
> 
> B is their main "core" router.
> 
> Looking at the routes in B, it shows that they are pref'n routes via B's transit providers, instead of via our link through A.
> 
> Yet the AS path is much shorter via A to us.
> 
> The same route via B is 5 AS's (no padded) and the route via A is 2 AS's
> 
> In looking at the route selection priorities, Local-Pref and then AS path should cause our routes to win well before the iBGP / eBGP selection rule(S)
> 
> Not sure what I'm missing here. I know its gotta be dumb and in another life I would know the answer.
> 
> Thoughts oh wise list ??
> 
> Mucho thanks.
> 
> 
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