[NTLUG:Discuss] OT: BGP question

[Pace, Jonathan]

you might look at some looking glass type sites to see how your AS number is
being advertised.

from http://nitrous.digex.net/ you can get some statistics and routes from
digex routers at MAE east and such.  putting in that class C, i only see a
route through AS2828 (XO) to DCAS Software Solutions (AS 21649).  so if
qwest is supposed to be advertising that class C via BGP, not sure, but i
think they ain't.

jwp


-----Original Message-----
From: Jack Snodgrass [mailto:idiotboy+ntlug at cybermail.net] 
Sent: Thursday, February 21, 2002 4:26 PM
To: discuss at ntlug.org
Subject: [NTLUG:Discuss] OT: BGP question


Anyone now how to tell if BGP has been set up correctly? 
  
I have two T1's... one through XO and one through Quest. 
They are supposed to both being doing BGP for my class C - 63.145.47.x. 
Quest and XO say that the BGP stuff is setup correctly, but I'm not 100%
sure that it is. How can I tell for sure? Is there a way to do a BGP
query 
for a ip address? 
  
I've tested it and I know that if I unplug one T1, the traffic all comes
in on the 
other. That part works fine. 
  
The problem is that late this afternoon, XO started having routing
problems so 
we unplugged the XO T1. Traffic came in on the QUEST T1 ok, but
sometimes 
from several external sites, we could do a traceroute and see that XO
tried to 
take of the routing and it was failing becuase we had the T1 powered
off. If the 
XO T1 was down, they never should have advertised a BGP route for our 
class C. 
  
So... I need to know how to tell for sure. 
  
Thanks - jack