[c-nsp] bgp config [continue]

Pete Templin petelists at templin.org
Fri Aug 5 08:58:04 EDT 2005


Shaun Reitan wrote:

> The problems i've been having are the following.
> 
> When turning bgp up the first problem I see is that customers in my address
> space cannot trace to his address space, they can ping.  I think I narrowed
> this problem down, I think what is happening is that my route see's his ip
> space as bring across the ds3 (a sh ip bgp shows his ip space having a *> to
> his side of bgp nei) and sends the packets across the ds3, but then his
> router listens to the route-maps and sends back across Cox.  A few reasons
> why I think this, 1 being that if I set a static route on his router routing
> my ip space back through the ds3 it solves the problem.  Second being that
> pings shows 17ms rather than 1ms I get when the static route is in place.  A
> few have told me just to leave the static route in place but that seams half
> assed to me.  If the ds3 is ever down then bgp would route around it.

Use BGP.  Modify his incoming route map from you to apply a HIGHER local 
pref (250?) to your prefixes, leaving the default local preference for 
any of your upstream routes (i.e. your default to him) to be less 
preferable.

pt


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