Determine difference between 2 BGP feeds

Tue Apr 18 20:31:51 UTC 2006

On Apr 18, 2006, at 1:19 PM, Mike Walter wrote:

>
> Sounds to me like one of your providers is not feeding you the full
> internet routing table.  Have you checked with them to see if they are
> providing you that?

Sounds to me like a: you are only looking at best routes or b: one of  
the providers is sending you more specific customer routes (that they  
summarize before sending to non-customers).

Personally I would just slurp one set of routes into an array in perl  
and then delete them if they appear in the other set. Any left over  
in either set are unique....

W

>
> Mike Walter
> Systems Administrator
>
>
> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On  
> Behalf Of
> Scott "Tuc" Ellentuch at T-B-O-H
> Sent: Tuesday, April 18, 2006 4:13 PM
> To: nanog at merit.edu
> Subject: Determine difference between 2 BGP feeds
>
>
> Hi,
>
> 	We receive a BGP feed from different providers on two
> different routers. While one seems to be a reasonable amount
> of feeds after reviewing the CIDR report, the other is anywhere
> from 3K to 10K more routes.
>
> 	Is there a utility that I can use that will pull the
> routes off each router (Foundry preferred), and then compare
> them as best it can to see why there is such a difference?
> I can understand a handful of routes over what CIDR says,
> but a minimum of 3K more?
>
> 		Thanks, Tuc/TBOH
>
>

--
Some people are like Slinkies......Not really good for anything but  
they still bring a smile to your face when you push them down the  
stairs.