[c-nsp] Level3/Cogent/HVDataNet specific routing problem - looking for suggestions

Tim Durack tdurack at gmail.com
Fri Nov 16 13:27:18 EST 2007


On Nov 16, 2007 1:07 PM, Jonathan Crawford <jcrawford at servious.org> wrote:
> The prepeding should have nothing to do with your lack of connectivity
> through Cogent. All the prepending would do is possibly make another route
> look more desireable due to the as-path. They already append their ASN when
> you pass through their AS.

I was hoping prepending the Level3/Cogent peering would make Cogent a
less preferred way to get to me.

> As a second note... are you allowing UDP ports for traceroute?
>
> I can trace 208.74.141.252 with ICMP, but with UDP I drop right at your
> edge. Cisco uses UDP by default.
>

ICMP only. I should probably fix that to make this kind of
troubleshooting easier.

Tim:>


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