dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
883
share rss forum feed

geowil

join:2008-04-20
Laveen, AZ

1 edit

[AZ] Massive Packet loss this week

Click for full size
Epic Packet Loss
Does anyone know, maybe one of the cox support posters, if Cox is having some serious issues with their network? All this week I have had nothing but 50% to 75% lost packets for most of the day; it only gets better around peak times, which makes no bloody sense.

Trace routes show many Cox nodes dropping packets. I also cannot get any of the DSLReports tools like Line Test and Smoke Ping to connect to my address even though my setup has not changed since 2008 (last time I used the tools was in 2010 I think).

Edit:

Here is a ping plotter screen shot to illustrate the problem.

--
Speedtest.net:
27759KB/s Down
538kb/s Up

m8trix

join:2003-12-24
Phoenix, AZ
kudos:4
Reviews:
·Cox HSI

verify your ping test with out the router in place beyound that you may need a tech out as its most likely something at or near your home that is causing the issue because if it were a network issue alot of people would of called in and triggered an outage.

so i would call in verify if there are any outages if not have a tech out



Ender3rd

join:2001-07-15
Connecticut
reply to geowil

I would suggest that you ping a target within the Cox network. A good place to start might be the third hop in your screenshot at 68.2.8.37 to see how local the issue appears to be. If packet loss is evident take more screenshots over the course of several days to establish some history of the problem and contact Cox tech support for a residential visit. Show the tech your screenshot(s) to assure he/she understands that the issue is within the Cox network.

Does you modem indicate poor signal levels, an SNR issue, or a high error count?
--
Politicians are the only people in the world who create problems and then campaign against them. (Charlie Reese)


geowil

join:2008-04-20
Laveen, AZ

That is what I have been doing over the past few days. Hop 6 in that screen shot seems to be the problem area. It has consistently dropped packets over the last few days and has had 100% packet loss many times but is usually between 25% and 75% packet loss.

I am getting some errors and critical messages in my modem logs but I do not think they are related:

2012-11-25 07:11:09 4-Error D103.0 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=
1970-01-01 00:00:25 6-Notice I401.0 TLV-11 - unrecognized OID
1970-01-01 00:00:24 5-Warning D004.1 ToD request sent - No Response received
1970-01-01 00:00:17 5-Warning D003.0 DHCP WARNING - Non-critical field invalid in response ;CM-MAC=00:1a:de:63:fb:c2;
1970-01-01 00:00:13 6-Notice M571.1 Ethernet link up - ready to pass packets
1970-01-01 00:00:08 6-Notice M571.0 Ethernet link down - not ready to pass packets
2012-11-23 15:20:42 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2012-11-23 10:02:40 4-Error D103.0 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=
2012-11-20 19:39:49 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2012-11-20 10:02:40 4-Error D103.0 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=
2012-11-18 14:22:51 3-Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
2012-11-18 10:02:40 4-Error D103.0 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=

As for my levels:
Downstream Value
Frequency 849000000 Hz
Signal To Noise Ratio 33.9 dB
Power Level -5.4 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

Upstream Value
Channel ID 2
Frequency 29600000 Hz
Power 38.7 dBmV
--
Speedtest.net:
27759KB/s Down
538kb/s Up


AZHSISUPPRT2

join:2007-11-01
El Mirage, AZ
kudos:7
reply to geowil

geowil,

PM me your HFC MAC address and I'll take a look at it and see what I can find for you.

Thanks,
--
Chris@Cox Communications Arizona



AZPacketLoss

@cox.net

COX service is Chandler, Arizona. Have had service at same location for 2 years. No change to equipment or wiring.

I have been having intermittent packet loss issues through the ipv4 gateway ip beyond my equipment for upwards of 2 weeks now. When everything is fine, I have no loss. Somewhere between 5pm-7pm or between 11pm-1am, I start getting massive 40-80% loss to my first hop. I can't even connect to my work's VPN because the loss is so horrible.

Every time I've called into cox for assistance, the rep says they can't see my cable modem on their end and eventually they report "I am affected by an outage", but they have no details on the outage. When it clears up.. it instantly clears up and the world is fine again. This really feels like either I am on an over-subscribed switch or my cox VLAN is undergoing a massive DDoS attack.. or something at the layer 1/2 level. What's weird is I can sync my cable modem, dhcp an IP.. but the reps still "can't see my modem" on their end. My cable modem's MAC address, isn't showing up on ther cox side.

I tried buying a new cable modem tonight -- same issue remains.

I've tried hooking up multiple systems directly to the cable modem -- no luck there. My coax line is a straight line out to the external box.

Trace tonight from my desktop -> router -> cable modem -> gateway ip results in 42% loss out of 351 packets:

»gist.github.com/4159095

A traceroute to cox.net show how horrible the connection is:
»gist.github.com/4159118

Halp!



AZPacketLoss

@cox.net

Had a tech come out and she helped discover someone in my area was splitting cable and reselling it. Cox got rid of that.. and now, 0% packet loss!

Yeah!


jsmiddleton4

join:2003-11-13
Glendale, AZ

Wow. Maybe they should give you a little "Atta boy" reward on your bill this month?