[outages] Bay Area packet loss at Comcast (gblx.net, he.net)

Dylan N dylan at dylannguyen.net
Sat Jan 19 14:04:14 EST 2013


I get packetloss on te-1-12-0-0-ar01.sfsutro.ca.sfba.comcast.net to my
linode @ fmt at weekends and at nights, looks more like just too much
load rather than an outage


On Sat, Jan 19, 2013 at 10:37 AM, Stephen Wilcox
<steve.wilcox at ixreach.com> wrote:
> Thats not an outage, thats a congested link - probably you should report to
> HE / GBLX / Comcast....
>
>
> On 19 January 2013 06:37, Constantine A. Murenin <mureninc at gmail.com> wrote:
>>
>> I think this happens practically every evening recently, for traffic
>> between Comcast in NorCal and Linode at he.net in Fremont, around
>> gblx.net.
>>
>> Today I have been monitoring through a crontab script since 16:00 PT,
>> with a 10-minute mtr runs in a loop.  The traffic loss has started in
>> the 20:50/21:00 timeframe, and is still ongoing (22:20).  There
>> weren't a 10-minute interval between 20:50 and 22:20 without at least
>> a 4% packet loss (often more than that).
>>
>>
>> 2013-01-18T20:50:09-0800
>> HOST: li163-###                                        Loss%   Snt
>> Last   Avg  Best  Wrst StDev
>>   1. router1-fmt.linode.com                            0.0%   600
>> 47.5  29.2   0.5 304.2  38.4
>>   2. 10gigabitethernet2-3.core1.fmt1.he.net            0.0%   600
>> 0.6  16.3   0.6 929.0  64.5
>>   3. 10gigabitethernet1-2.core1.sjc2.he.net            0.5%   600
>> 2.4   4.1   0.7  41.9   6.4
>>   4. Port-channel100.ar3.SJC2.gblx.net                 2.2%   600
>> 75.7  31.8   0.8 1160.  76.7
>>   5. po6-20G.ar4.SJC2.gblx.net                         1.3%   600
>> 19.9  33.4   0.9 917.4  72.8
>>   6. lag8.ar5.SJC2.gblx.net                            3.3%   600
>> 1.1   4.4   0.9  22.3   5.4
>>   7. 208.178.58.2                                      4.2%   600
>> 4.2   4.2   1.5  39.7   2.1
>>   8. pos-2-7-0-0-cr01.sanjose.ca.ibone.comcast.net     6.8%   600
>> 10.6   7.2   4.7  43.8   2.9
>>   9. pos-1-4-0-0-cr01.sacramento.ca.ibone.comcast.net  3.7%   600
>> 20.7 9.5 7.0 26.7   1.9
>>  10. te-7-3-ar02.saltlakecity.ut.utah.comcast.net      4.7%   600
>> 92.1  12.4   7.4 129.2  19.1
>>  11. 69.139.222.50                                     3.3%   600
>> 7.9   8.1   7.6  59.3   2.6
>>  12. te-1-0-0-ten05.sacramento.ca.ccal.comcast.net     3.2%   600
>> 14.3  14.4 14.1 26.0 1.6
>>  13. 74-93-180-##-Sacramento.hfc.comcastbusiness.net   4.2%   600
>> 20.9  21.7  14.2 193.0  13.6
>> 2013-01-18T21:00:10-0800
>>
>> 2013-01-18T21:30:04-0800
>> HOST: li163-###                                        Loss%   Snt
>> Last   Avg  Best  Wrst StDev
>>   1. router1-fmt.linode.com                            0.0%   600
>> 0.6  11.0   0.5 202.3  21.2
>>   2. 10gigabitethernet2-3.core1.fmt1.he.net            0.0%   600
>> 4.5  20.2   0.5 315.3  46.0
>>   3. 10gigabitethernet1-2.core1.sjc2.he.net            0.0%   600
>> 11.5   3.4   0.7  25.9   3.7
>>   4. Port-channel100.ar3.SJC2.gblx.net                 6.2%   600
>> 1.0  28.5   0.8 845.3  65.5
>>   5. po6-20G.ar4.SJC2.gblx.net                         9.8%   600
>> 1.2  32.6   0.9 689.9  68.5
>>   6. lag8.ar5.SJC2.gblx.net                           12.2%   600
>> 1.0   4.8   0.9  26.9   5.4
>>   7. 208.178.58.2                                     12.0%   600
>> 5.2   4.4   1.6  39.0   2.2
>>   8. pos-2-7-0-0-cr01.sanjose.ca.ibone.comcast.net    13.0%   600
>> 7.6   7.3   4.7  45.0   2.8
>>   9. pos-1-4-0-0-cr01.sacramento.ca.ibone.comcast.net 11.5%   600
>> 7.6   9.6   7.2  24.1   2.1
>>  10. te-7-3-ar02.saltlakecity.ut.utah.comcast.net     12.3%   600
>> 7.6  12.6   7.4 162.7  19.7
>>  11. 69.139.222.50                                    12.2%   600
>> 8.0   8.5   7.6 157.5   6.9
>>  12. te-1-0-0-ten05.sacramento.ca.ccal.comcast.net    11.0%   600
>> 14.3  14.8  14.1  29.2   2.3
>>  13. 74-93-180-##-Sacramento.hfc.comcastbusiness.net  12.5%   600
>> 15.9  26.3  14.4 417.3  33.3
>> 2013-01-18T21:40:04-0800
>>
>> 2013-01-18T22:00:01-0800
>> HOST: li163-###                                        Loss%   Snt
>> Last   Avg  Best  Wrst StDev
>>   1. router1-fmt.linode.com                            0.0%   600
>> 17.2  19.9   0.5 195.7  27.4
>>   2. 10gigabitethernet2-3.core1.fmt1.he.net            0.0%   600
>> 1.1  31.0   0.5 1666. 109.0
>>   3. 10gigabitethernet1-2.core1.sjc2.he.net            0.0%   600
>> 0.8   3.3   0.7  13.2   3.6
>>   4. Port-channel100.ar3.SJC2.gblx.net                 5.5%   600
>> 2.0  27.7   0.9 290.3  56.5
>>   5. po6-20G.ar4.SJC2.gblx.net                        13.3%   600
>> 1.0  33.5   0.9 770.0  71.0
>>   6. lag8.ar5.SJC2.gblx.net                           16.8%   600
>> 15.0   5.7   0.8  30.1   6.0
>>   7. 208.178.58.2                                     17.2%   600
>> 5.9   4.5   1.5  30.2   2.4
>>   8. pos-2-7-0-0-cr01.sanjose.ca.ibone.comcast.net    18.5%   600
>> 7.2   7.3   4.9  34.8   2.4
>>   9. pos-1-4-0-0-cr01.sacramento.ca.ibone.comcast.net 17.8%   600
>> 9.8   9.6   7.1  24.0   2.1
>>  10. te-7-3-ar02.saltlakecity.ut.utah.comcast.net     15.8%   600
>> 7.7  12.8   7.4 177.3  19.8
>>  11. 69.139.222.90                                    17.0%   600
>> 7.9   8.9   7.6 164.0   8.3
>>  12. te-1-0-0-ten05.sacramento.ca.ccal.comcast.net    13.3%   600
>> 14.3  15.1  14.1  27.9   3.0
>>  13. 74-93-180-##-Sacramento.hfc.comcastbusiness.net  17.5%   599
>> 21.4  20.5  14.3 147.7   9.5
>> 2013-01-18T22:10:07-0800
>>
>>
>> Anyone else has noticed?  ssh is completely unusable for a couple of
>> seconds every now and again.
>>
>> It seems to have subdued back to a 0% loss as of 22:20/22:30 window,
>> but I bet it'll be back.
>>
>> C.
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