[Nanog] Cogent Router dropping packets

Sat Apr 19 00:05:58 UTC 2008

(Crossed Fingers)

Cogent's network seems "OK", for now.

I've received several responses asking for details on how I would avoid
Cogent.  It looks like getting a connection to the AT&T network will allow
us to serve our customers on their DSLS and use their direct peering to the
Time Warner network for our customers with cable Internet.

If anyone has any ideas on how this will work, please let me know.  For
instance, do most networks prefer to keep packets on their network until
closest to the end point or might a network just send the traffic through
cogent in another part of their network a few hops away?

-----Original Message-----
From: Mike Fedyk 
Sent: Thursday, April 17, 2008 2:59 PM
To: nanog at merit.edu
Subject: RE: Cogent Router dropping packets

I spoke too soon:

 Host                                              Loss%   Snt   Last   Avg
Best  Wrst StDev
 1. adsl-63-194-XXX-XXX.dsl.lsan03.pacbell.net      0.0%   109    9.2  19.2
8.4  57.9  11.0
 2. dist3-vlan60.irvnca.sbcglobal.net               0.9%   109    8.4  16.7
8.3  45.6   9.6
 3. bb1-p6-7.emhril.ameritech.net                   0.0%   109    8.6  36.3
8.5 256.6  44.2
 4. ex2-p14-0.eqlaca.sbcglobal.net                  0.0%   109   10.3  39.4
9.3 209.3  46.2
 5. te8-1.mpd01.lax05.atlas.cogentco.com            0.0%   108   32.4  34.3
9.3 238.6  45.1
 6. vl3491.ccr02.lax01.atlas.cogentco.com           3.7%   108   17.0  23.4
12.9  98.9  13.4
 7. te3-4.ccr01.lax04.atlas.cogentco.com           17.6%   108   39.1  28.8
16.4 198.9  22.1
 8. vl3805.na21.b002695-2.lax04.atlas.cogentco.com 12.0%   108   34.1  27.6
17.0  68.7  11.2
 9. PAETEC_Communications_Inc.demarc.cogentco.com  10.2%   108   22.4  35.3
17.0 168.7  27.8
10. gi-4-0-1-3.core01.lsajca01.paetec.net          18.5%   108   21.2  34.2
21.0 188.6  20.6
11. po-5-0-0.core01.anhmca01.paetec.net            10.3%   108   35.7  33.9
20.5 232.7  23.9
12. gi-3-0-0.edge03.anhmca01.paetec.net            13.0%   108   21.0  31.6
20.2 157.9  16.6
13. 74.10.xxx.xxx                                   11.1%   108   25.7  33.9
25.2  55.2   8.9
14. 74.10.xxx.xxx                                   15.7%   108   26.7  35.7
25.0  70.8  11.7

-----Original Message-----
From: Mike Fedyk 
Sent: Thursday, April 17, 2008 2:15 PM
To: Ryan Harden
Cc: nanog at merit.edu
Subject: RE: Cogent Router dropping packets

Thank you, the issue seems to be fixed now at Cogent.