Re: [isp-bgp] BGP and policy based routing question

[Pete Templin <petelists@...>]

David Enns wrote:
> We just multihomed our network and set up BGP. When we started our ISP 7
> years ago we were assigned a small block of 64 ip addresses from ISP 1,
> 192.168.1.0/26, for our use. We put our first name server on this network.
> Now that we have set up BGP this block is unreachable for some networks from
> the internet. After doing some troubleshooting we believe that our router is
> sending traffic over ISP 2. Because this network is less than a class C it
> does not now what to do with the traffic and drops it.
What you have looks good.  The IP policy route-map ns1 statement on 
S2/0/1 is unnecessary and may impact router CPU, but won't hurt 
anything.  Is it not working for you?

The /26 is probably reachable just fine from the Internet, but ISP2 may 
be filtering your traffic because its routing table doesn't show 
192.168.1.0/26 pointing towards you.  You may want to check with them, 
and ask if they can install a static route for the /26 to you, and/or 
manually update their filters.

pt






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