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Vonage Warning: Long ramble...
I've posted stuff here before about random outbound
Warning: Long ramble...
I've posted stuff here before about random outbound traffic loss through Comcast. Here's a summary, some updated Comcast support experiences, and questions.
Our Vonage/Comcast calls never entirely drop. The quality, when it works in both directions, is great. Randomly, our Comcast connection will lose outbound traffic, meaning callers can't hear us, but was can hear them. This "symptom" can last between 4 and 16 seconds (as noted through PingPlotter history).
Before the Comcast tech came out, I disconnected Vonage, my wireless, etc. I hooked the cable modem directly up to my PC to eliminate any possibility of Comcast blaming 3rd party equipment.
I had a Comcast tech come out yesterday to look at this. I showed him the logs of PingPlotter going to download.com and yahoo.com. I showed him the identical times that both dropped out. I explained to him that these drop outs, when the Vonage router was hooked up previously, were always outbound traffic issues - we could hear the caller, the caller couldn't hear us, and the conversation would normally resume once the "red line" ended.
He tested the signal, and it was fine. About two minutes after he arrived, the connection died, but he wasn't running any of his own "tests". His own test is to ping -t comcast.net. He said that PingPlotting download.com and yahoo.com isn't good enough since it could be an outside-of-Comcast network issue. Phooey. Looking at the hops, most of them are Comcasts (attbi and attens). Only the last hops are yahoo and download.com. When looking at the history of the dropped outbound traffic, there was 100% packet loss across the board (starting with the 1st hop). He wasn't convinced for some reason.
He unscrewed the coax from the wall, looked at it, blew at it, and plugged it back in. He unscrewed the coas from the cable modem, and noticed the wire was coming out way too far. He cut it off and put another fitting on it, hoping that was the cause of the issue. About 30 minutes after he left, it happened again, and has happened about 30 times since then. So much for the magic pill.
I called Comcast support again. The lady I talked to this time was trying to pawn this off to Comcast Phone support (I mentioned Vonage Voip during the call). I explained the issue about 10 different ways, another tech is coming on Tuesday.
This is where my question comes in.
Looking at PingPlotter (plotting ANY ip address), I see this IP address as the first hop:
73.171.8.1
She said this was something between my PC and cable modem. When my outbound loss happens, all hops get 100% loss, including this IP. The only thing between my PC and cable modem is a nice blue ethernet cable.
My question: Is 73.171.8.1 an ip of a cable modem, a Comcast piece of equipment, or something else? When the tech came yesterday, he went to 192.168.100.1 to look at the cable modem status screen. I have a feeling that the 73 address is some sort of neighborhood switch that is failing. There isn't a DSNName listed for it, nor the next hop (68.87.157.21). The next hop is 68.87.144.237 (Comast in Milford, MA).
I'm consistently getting failures of about 40-50/day, all for between 4 and 16 seconds.
I'm now without Vonage service (or wireless connection) until Tuesday while I continue to monitor the network without any other devices connected.
Any thoughts on the 73.171 address?
Thanks,
-Craig
Read The Full Thread: Comcast, outbound dropouts, questions - Resolved
• Craig,
I'm in southern California and have similar problems as Craig over
• Comcast came out again (yesterday) with a different tech. Before he came out,
• Are you located in the Midwest, Craig?
• Nope (I've read most of that thread). I'm about 30 minutes west of Boston, MA. This
• 95% of the time, outbound audio dropping out is related to packet loss from the
• Exactly. It never crossed my mind to call Vonage, as this is entirely a Comcast
• Open a DOS window:
> ping 73.171.8.1
> ipconfig/all
> ping <default
• Thanks for all the juicy information to check on, but I will reduce this down to
• Ok, I agree that eliminates your Nic...so fire up ping plotter to the management
outrun posted "Warning: Long ramble...
I've posted stuff here before about random outbound" on 04/01/2006 |
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