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.