[outages] Comcast LA issue?
John Neiberger
jneiberger at gmail.com
Thu Feb 19 19:24:08 EST 2015
Those of you having issues, can you check to see if they're still occurring?
Thanks,
John
On Thu, Feb 19, 2015 at 4:25 PM, Jeremy Chadwick via Outages <
outages at outages.org> wrote:
> Here's another destination showing the same problem (I can't even load
> http://www.dslreports.com/ at present -- handshake works, but either
> client->server GET request gets lost, or payload response gets lost,
> followed by TCP retrans, eventually RST from the server, rinse lather
> repeat), with things again looking centralised around LA.
>
> Hopefully having multiple test endpoints will come in handy.
>
> Source IP: 69.181.142.213
> Destination IP: 64.91.255.98
>
>
> Packets Pings
> Host Loss%
> Snt Rcv Last Avg Best Wrst
> 1. gw.home.lan (192.168.1.1) 0.0%
> 171 171 0.2 0.2 0.2 0.4
> 2. 69.181.136.1 0.0%
> 171 171 12.7 9.6 7.7 19.2
> 3. te-0-2-0-5-sur03.santaclara.ca.sfba.comcast.net (68.86.249.69)
> 0.0% 171 171 9.4 9.2 8.0 17.1
> 4. te-0-0-0-13-sur03.sanrafael.ca.sfba.comcast.net (162.151.78.134
> 0.0% 171 171 12.1 12.2 9.5 18.4
> 5. he-1-5-0-0-cr01.sanjose.ca.ibone.comcast.net (68.86.90.93)
> 98.8% 171 2 50456 50095 49735 50456
> 6. he-2-9-0-0-cr01.losangeles.ca.ibone.comcast.net (68.86.86.102)
> 2.9% 171 166 14.1 13.5 10.9 22.7
> 7. he-2-12-0-0-cr01.seattle.wa.ibone.comcast.net (68.86.86.229)
> 1.8% 171 168 29.2 30.2 27.4 36.3
> 8. he-0-15-0-0-cr01.denver.co.ibone.comcast.net (68.86.86.213)
> 9.9% 171 154 50.1 47.6 44.9 53.1
> 9. he-5-13-0-0-cr01.350ecermak.il.ibone.comcast.net (68.86.85.245)
> 4.1% 171 163 72.9 72.3 68.6 84.7
> 10. hu-0-10-0-1.pe03.350ecermak.il.ibone.comcast.net (68.86.86.6)
> 5.3% 170 161 69.8 69.4 68.1 84.7
> 11. 50.242.150.126 7.1%
> 170 158 106.0 89.7 67.4 400.5
> 50.242.150.130
> 12. lw-dc3-core1-te8-16.rtr.liquidweb.com (209.59.157.244)
> 9.4% 170 154 75.7 80.9 75.2 242.7
> 13. lw-dc3-dist15-po5.rtr.liquidweb.com (69.167.128.241)
> 2.4% 170 166 75.0 75.9 74.7 83.6
> 14. www.dslreports.com (64.91.255.98)
> 5.3% 170 161 74.2 74.3 73.2 82.5
>
> --
> | Jeremy Chadwick jdc at koitsu.org |
> | UNIX Systems Administrator http://jdc.koitsu.org/ |
> | Making life hard for others since 1977. PGP 4BD6C0CB |
>
> On Thu, Feb 19, 2015 at 03:07:04PM -0800, Jeremy Chadwick wrote:
> > Something weird is going on with Comcast in Los Angeles: small packets
> > appear to be getting discarded with a loss rate of ~6-10% while larger
> > packets (I've tried 1000 and 1200) seem to make it through without any
> > loss. Things like SSH and IMAP+SSL are impacted consistently
> > (particularly during key exchange), while HTTP does not appear to be, so
> > the issue appears to be affecting both TCP and ICMP (have not tested
> > UDP).
> >
> > First sign of this issue, according to my logs, is at 11:51 PT (UTC-8),
> > and has gradually gotten worse over the past few hours.
> >
> > Looks like the issue is with the forward path (Source->Destination
> > listed below), as the return path only shows loss at the final
> > destination. (I currently cannot provide a return-path mtr because the
> > only way I can access my box is through VNC, and I don't like doing
> > things like screenshots of a VNC window, so you'll just have to trust
> > me)
> >
> > Nothing anomalous shows up when using L3's looking glass to ping things,
> > and the only Comcast LG I know of is in NYC.
> >
> > I most likely won't see Email responses from anyone (directly or to the
> > list) until this problem is addressed, since my mail is hosted on shown
> > box and cannot currently be fetched due to the problem. Frustrating.
> >
> > Source IP: 69.181.142.213
> > Destination IP: 174.136.108.146
> >
> > ICMP 56 bytes:
> >
> >
> Packets Pings
> > Host
> Loss% Snt Rcv Last Avg Best Wrst
> > 1. gw.home.lan (192.168.1.1)
> 0.0% 185 185 0.2 0.2 0.2 0.3
> > 2. 69.181.136.1
> 0.0% 185 185 8.9 9.9 7.0 21.1
> > 3. te-0-2-0-5-sur03.santaclara.ca.sfba.comcast.net (68.86.249.69)
> 0.0% 185 185 8.7 9.9 7.9 17.0
> > 4. te-0-0-0-13-sur03.sanrafael.ca.sfba.comcast.net (162.151.78.134
> 0.0% 185 185 10.7 12.9 9.7 20.7
> > 5. he-1-5-0-0-cr01.sanjose.ca.ibone.comcast.net (68.86.90.93)
> 98.4% 184 3 49496 49006 47906 49615
> > 6. he-2-9-0-0-cr01.losangeles.ca.ibone.comcast.net (68.86.86.102)
> 5.4% 184 174 11.9 14.1 10.9 23.5
> > 7. 50.242.148.34
> 6.5% 184 172 11.7 13.4 10.4 69.9
> > 8. ae-3-80.edge6.LosAngeles1.Level3.net (4.69.144.142)
> 66.7% 184 61 44.9 20.6 18.0 44.9
> > 9. ae-3-80.edge6.LosAngeles1.Level3.net (4.69.144.142)
> 59.0% 184 75 18.7 19.8 18.0 26.0
> > 10. ae-27-27.car2.LosAngeles1.Level3.net (4.69.201.18)
> 2.2% 184 180 20.8 63.1 18.2 293.3
> > 11. GIGLINX-INC.car2.LosAngeles1.Level3.net (4.30.195.86)
> 6.0% 184 173 19.2 22.2 19.1 39.3
> > 12. mambo.koitsu.org (174.136.108.146)
> 6.5% 184 172 18.8 20.6 18.5 36.9
> >
> > Note: Loss shown at above hops #5, #8, and #9 are normal according to
> > historic data (i.e. ICMP prioritisation is in effect) -- however loss at
> > hop #6 is new.
> >
> >
> > ICMP 1200 bytes:
> >
> >
> Packets Pings
> > Host
> Loss% Snt Rcv Last Avg Best Wrst
> > 1. gw.home.lan (192.168.1.1)
> 0.0% 43 43 0.3 0.3 0.2 0.4
> > 2. 69.181.136.1
> 0.0% 43 43 9.7 10.4 8.6 14.3
> > 3. te-0-2-0-5-sur03.santaclara.ca.sfba.comcast.net (68.86.249.69)
> 0.0% 42 42 10.0 10.0 8.7 16.0
> > 4. te-0-0-0-13-sur03.sanrafael.ca.sfba.comcast.net (162.151.78.134
> 0.0% 42 42 11.7 13.3 10.3 18.9
> > 5. ???
> > 6. he-2-9-0-0-cr01.losangeles.ca.ibone.comcast.net (68.86.86.102)
> 0.0% 42 42 14.4 15.9 12.4 25.1
> > 7. 50.242.148.34
> 0.0% 42 42 12.7 13.6 11.2 23.1
> > 8. ae-3-80.edge6.LosAngeles1.Level3.net (4.69.144.142)
> 9.8% 42 37 20.0 20.7 18.8 25.0
> > 9. ae-3-80.edge6.LosAngeles1.Level3.net (4.69.144.142)
> 0.0% 42 42 19.1 21.1 18.9 29.9
> > 10. ae-27-27.car2.LosAngeles1.Level3.net (4.69.201.18)
> 0.0% 42 42 64.3 105.7 20.9 412.5
> > 11. GIGLINX-INC.car2.LosAngeles1.Level3.net (4.30.195.86)
> 0.0% 42 42 20.6 22.5 19.9 31.2
> > 12. mambo.koitsu.org (174.136.108.146)
> 0.0% 42 42 20.7 22.0 20.1 26.4
> >
> > --
> > | Jeremy Chadwick jdc at koitsu.org |
> > | UNIX Systems Administrator http://jdc.koitsu.org/ |
> > | Making life hard for others since 1977. PGP 4BD6C0CB |
> >
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