[outages] Comcast packet loss

[John Neiberger]

I'm not seeing any loss on our side. This is from the first Comcast router
you hit:

#ping 192.30.252.129 size 1000 count 1000
Wed Oct 22 16:34:46.957 utc
Type escape sequence to abort.
Sending 1000, 1000-byte ICMP Echos to 192.30.252.129, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 32/32/33
ms

>From that same router back to the first hop in your trace:

#ping 200.147.29.137 count 500
Wed Oct 22 16:36:59.522 utc
Type escape sequence to abort.
Sending 500, 100-byte ICMP Echos to 200.147.29.137, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!
Success rate is 100 percent (500/500), round-trip min/avg/max = 151/152/218
ms

Long RTT, but it's long distance, so totally what I'd expect. What's
interesting to me is the huge RTT in your trace. You might want to check
with Highwinds Network Group or Universo Online to see if they can
troubleshoot from their network back to you. The path on our side looks
good from initial observations.

John

On Wed, Oct 22, 2014 at 10:19 AM, Everton Marques via Outages <
outages at outages.org> wrote:

> High packet loss from Highwinds towards github.com.
> It seems the issue is rooted within Comcast.
>
> Time is 16:16:44.371 Wed Oct 22 2014 GMT-0
>
> ping -t 192.30.252.129
>
> Pinging 192.30.252.129 with 32 bytes of data:
> Reply from 192.30.252.129: bytes=32 time=474ms TTL=44
> Request timed out.
> Reply from 192.30.252.129: bytes=32 time=480ms TTL=44
> Reply from 192.30.252.129: bytes=32 time=483ms TTL=44
> Reply from 192.30.252.129: bytes=32 time=488ms TTL=44
> Request timed out.
> Reply from 192.30.252.129: bytes=32 time=485ms TTL=44
> Reply from 192.30.252.129: bytes=32 time=485ms TTL=44
> Reply from 192.30.252.129: bytes=32 time=481ms TTL=44
> Reply from 192.30.252.129: bytes=32 time=484ms TTL=44
> Reply from 192.30.252.129: bytes=32 time=478ms TTL=44
>
> Ping statistics for 192.30.252.129:
>     Packets: Sent = 11, Received = 9, Lost = 2 (18% loss),
> Approximate round trip times in milli-seconds:
>     Minimum = 474ms, Maximum = 488ms, Average = 482ms
> Control-C
>
> #traceroute 192.30.252.129
>
> Type escape sequence to abort.
> Tracing the route to 192.30.252.129
>
>   1 200.147.29.137 [AS 7162] 0 msec 0 msec 0 msec
>   2 200.147.29.146 [AS 7162] 0 msec 0 msec 0 msec
>   3  *  *  *
>   4 173.167.57.1 [AS 7922] 120 msec 120 msec 120 msec
>   5 68.86.82.249 [AS 7922] 120 msec 124 msec
>     68.86.82.253 [AS 7922] 124 msec
>   6  *  *  *
>   7  *  *  *
>   8 68.86.83.86 [AS 7922] 472 msec 472 msec 472 msec
>   9  *  *  *
>  10  *  *  *
>
> Everton
>
> _______________________________________________
> Outages mailing list
> Outages at outages.org
> https://puck.nether.net/mailman/listinfo/outages
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/outages/attachments/20141022/38cb8cd4/attachment.htm>