nanog mailing list archives

Re: comcast business service


From: shawn wilson <ag4ve.us () gmail com>
Date: Thu, 20 Feb 2014 15:35:10 -0500

Thanks. The tech said they looked at signal levels when I called and didn't
see anything. I didn't have a baseline at the time (I do now) and assumed
they'd see something there if there was something.

I do have the Netgear. So I'll keep this in mind when I call them again
(assuming it's really not a noise issue) though I'm not sure exactly what
happened here or how I can get them to try the same thing?
On Feb 20, 2014 3:11 PM, "Aaron C. de Bruyn" <aaron () heyaaron com> wrote:

If it's one of their new Netgear-branded modems, see if you can get your
tech to dig up an SMC.

We had the same issue.  They swapped out one Netgear modem for another
Netgear and the problem continued. The phone techs couldn't see the problem
and kept blaming our equipment.  They finally sent out one of the 'senior'
engineers I had worked with before on other jobs.  He managed to get a hold
of one of the SMCs from their warehouse.  No more issues.

-A


On Thu, Feb 20, 2014 at 1:08 AM, shawn wilson <ag4ve.us () gmail com> wrote:

A while ago I got Comcast's business service. Semi-idle connections
are get dropped (I haven't really diagnosed this - I just no that it
isn't the client or server but some network in between). However the
second and most obvious issue is that intermittently, the service will
grind to a halt:
--- 8.8.8.8 ping statistics ---
37 packets transmitted, 34 received, 8% packet loss, time 36263ms
rtt min/avg/max/mdev = 398.821/5989.160/14407.055/3808.068 ms, pipe 15

After a modem reboot, it goes normal:
--- 8.8.8.8 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 23.181/23.920/24.298/0.474 ms

This seems to happen about once or twice a day. I can't attribute it
to any type of traffic or number of connections. All of the rest of
the network equipment is the same and the behavior persists when a
computer is plugged directly into the modem. I called Comcast and they
said they didn't see anything even when I was experiencing ridiculous
ping times. I tend to think it's an issue with the 'modem' but I'm not
sure what the issue might be or how to reproduce it when asked to if I
tell them to look at it.





Current thread: