Packet Loss between Qwest and Global Crossing

Andris Kalnozols andris at hpl.hp.com
Mon Feb 9 00:59:37 CST 2009


This post to the NANOG list in the hope that an interested
engineer from either Qwest or GBLX will act on the problem
I have observed.

I've identified a packet loss problem (10-15%) between Qwest
and Global Crossing.  From one end (HP), the partial traceroute
is:


traceroute to 68.85.190.221 (68.85.190.221), 30 hops max, 40 byte packets
 1  lpagwb01-vlan151-phy.hpl.hp.com (192.6.19.2)  0.622 ms  0.378 ms  0.315 ms
 2  * * *
 3  * * *
 4  65.115.64.25 (65.115.64.25)            1.380 ms  1.297 ms  1.233 ms
 5  205.171.14.150 (205.171.14.150)        1.377 ms  1.385 ms  1.277 ms
 6  67.14.34.14 (67.14.34.14)              1.955 ms  2.046 ms  1.962 ms
 7  205.171.233.18 (205.171.233.18)        2.204 ms  2.204 ms  2.076 ms
 8  63.146.26.42 (63.146.26.42)            5.937 ms  4.253 ms  4.574 ms
 9  * COMCAST-IP-SERVICES-LLC.TenGigabitEthernet1-3.ar2.snv2.gblx.net
                          (64.211.1.214)            21.942 ms  21.670 ms


There's no packet loss until the `gblx.net' (64.211.1.214) is pinged.

Coming from the other end (Comcast), the partial traceroute is:

Tracing route to gundega.hpl.hp.com [192.6.19.190]
over a maximum of 30 hops:


  1    *       *       *     Request timed out.
  2    9 ms    7 ms    7 ms  68.85.190.221
  3    8 ms    6 ms    6 ms  68.87.226.66
  4    7 ms    6 ms    7 ms  te-9-1-ur06.sanjose.ca.sfba.comcast.net
                             [68.87.192.54]
  5    9 ms    9 ms   11 ms  te-0-3-0-4-ar01.oakland.ca.sfba.comcast.net
                             [68.87.226.229]
  6   11 ms   11 ms   11 ms  pos-0-4-0-0-cr01.sacramento.ca.ibone.comcast.net
                             [68.86.90.141]
  7   13 ms   12 ms   13 ms  pos-0-8-0-0-cr01.sanjose.ca.ibone.comcast.net
                             [68.86.85.78]
  8   14 ms   12 ms   12 ms  TenGigabitEthernet3-1.ar1.snv2.gblx.net
                             [64.214.174.109]
  9   41 ms    *      38 ms  sjp-brdr-02.inet.qwest.net [63.146.26.41]


Pinging from this direction, there no packet loss until the
first Qwest router (63.146.26.41) is pinged.  So it seems
clear that the problem is between Qwest and Global Crossing.

------
Andris




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