Re: [nsp] Back to basics? BGP /27 advertisement

From: Josh Richards (jrichard@cubicle.net)
Date: Wed Mar 28 2001 - 19:00:16 EST


* William Sommers <sommers@sfo.com> [20010328 15:33]:
> Okay, much as I hate to admit it, I'm officially baffled -- this should be
> dirt simple. Is there perhaps some trick to advertising a prefix gt
> 24? IOS 12.0.16

Shouldn't be. :)

> Goal: Advertise a /27 delegated from an upstream, to that upstream.
>
> router bgp 65000
> no synchronization
> network 10.2.27.0 mask 255.255.255.224
> aggregate-address 10.2.27.0 255.255.255.224 summary-only
> neighbor 10.1.130.85 remote-as 65001
> neighbor 10.1.130.85 next-hop-self
> neighbor 10.1.130.85 route-map US-OUT out
                           ^^^^^^^^^^^^^^^^^^^^
                           Try changing this to:
                           prefix-list upstream_ip_out out
                           (you can then remove or just ignore the US-OUT
                            route-map)

In truth though, your config looks perfectly reasonable to me..

What does a "show ip bgp neigh 10.1.130.85 adv" look like? It'll give an
idea of whether the problem is in something with the filters/route-maps or
whether the route isn't even making it to the BGP process (which if it isn't,
I have no idea).

-jr

----
Josh Richards [JTR38/JR539-ARIN]
<jrichard@geekresearch.com/cubicle.net/fix.net/freedom.gen.ca.us>
Geek Research LLC - <URL:http://www.geekresearch.com/>
IP Network Engineering and Consulting



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