AT&T routing problems towards www.worldspan.com?

Mon Aug 30 09:51:19 UTC 2010

--- Original Message ---
>From: sthaug at nethelp.no
>Sent: Monday, August 30, 2010 5:22 AM
>To: nanog at nanog.org
>
>We have problems reaching www.worldspan.com (216.113.132.22) from
>some locations. The common problem seems to be AT&T (AS 7018). Our
>AS path towards the 216.113.128.0/19 prefix is typically
>
>   3356 7018 17228 19631
>
>Anybody else see problems here? I note that I can ping 216.113.132.22
>from some locations within our network - but not, for instance, from
>route-server.ip.att.net.
>
>Steinar Haug, Nethelp consulting, sthaug at nethelp.no
>

Not sure if this would be helpful....

Similar from West Michigan-USA. I also have troubles via
Qwest (USA) and Qwest  (via Colt) in Germany. I too
cannot ping that IP from these locations.

My guess is a possible node issue, not network.

#trace ip 216.113.132.22
Tracing the route to www.worldspan.net (216.113.132.22)
  1 12.87.238.5 [AS 7018] 8 msec 4 msec 12 msec
  2 cr82.dtrmi.ip.att.net (12.122.102.90) [AS 7018] 44 msec 40 msec 40 msec
  <snip>
 11 12-122-254-82.attens.net (12.122.254.82) [AS 7018] 40 msec 40 msec 40 msec
 12 mdf001c7613r0004-tge-12-1.atl1.attens.net (12.129.65.142) [AS 17228] 44 msec 44 msec 40 msec
 13 12.129.64.122 [AS 17228] 40 msec 40 msec
    12.129.64.126 [AS 17228] 40 msec
 14 10.5.158.229 40 msec
    10.5.158.225 44 msec 44 msec
 15  *  *  *

   <snip>

#sh ip bgp 216.113.132.22/19
BGP routing table entry for 216.113.128.0/19, version 54509208
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Advertised to update-groups:
        1
  7018 17228 19631
    12.87.238.5 from 12.87.238.5 (12.122.83.244)
      Origin IGP, localpref 100, valid, external, best

>From our German router (just a defgwy towards Qwest...)

#trace ip 216.113.132.22
Tracing the route to 216.113.132.22

  1 209.181.1.21 12 msec 12 msec 16 msec
  2 65.120.25.53 16 msec 12 msec 16 msec
  3 205.171.251.110 104 msec 104 msec 108 msec
  4 192.205.34.253 108 msec 108 msec 108 msec
  5 12.122.134.166 128 msec 124 msec 128 msec
  6 12.122.1.173 120 msec 120 msec 120 msec
  7 12.123.22.110 124 msec 128 msec 128 msec
  8 12.122.141.69 124 msec 124 msec 128 msec
  9 12.122.254.82 128 msec 120 msec 132 msec
 10 12.129.65.142 124 msec 128 msec
    12.129.65.138 120 msec
 11 12.129.64.122 124 msec
    12.129.64.126 120 msec 120 msec
 12  *  *  *
 13  *  *  *
 14  *  *  *