10-02-2010 9:47 AM
I'm on day two now. Yesterday was fine but I started having a problem today with the receivers. They play for a few seconds after a channel change and then freeze. If I change channels it then works for a few more seconds. This only happens on my two non-DVR STBs.
My internet connection is fine, getting a solid 23/3 mbps without any packet loss, 20 ms first hop ping. That's tested using the same CAT5 lines the receivers are on.
I also rebooted the DVR.
10-02-2010 12:18 PM
It was my own fault
I had accidentally double hopped the Netgear Gigabit switch through my D-Link DIR-655.
I noticed there was some multicast data in the D-Link's stats and remembered what Tom had said about multicast. I disabled multicast in the D-Link. After that the STB started to work but with very poor video to the STBs. That got me to thinking I might have crossed the wiring between the two devices as my intention had been to bypass the D-link for the STBs and use the Netgear gigabit switch only.
I'll take this to mean the DIR-655 can't handle the multicasting for U-verse STBs or a combination of it and the switch.
10-02-2010 3:51 PM
It is recommended that if you are to do a complex setup like this, keep computers and STBs separate if at all possible.
I know it would be a PITA but if you have more than three STBs (including the DVR), run an Ethernet switch directly off of the RG and plug those STBs into that. Then, get another Ethernet switch and plug that into the RG and plug only computers (and other wireless access points, like DIR-655) into that. The idea is to try and keep the STBs and computers on different segments of the network.
Yes, most SOHO network switches and routers handle the multicast data that uVerse uses for video very poorly.
10-02-2010 4:03 PM
It was an interesting lesson. These installations can be so sensitive. I wonder how many people go go bashing the product without properly diagnosing issues. TV used to be so simple .
The setup you described is what I thought I had. I must made a wrong connection at one point. Given my setup it was hard to trace and was working good last night.
The Netgear switch appears to be doing a good job.
What is the advantage of multicast?
10-02-2010 4:07 PM
OK, just read up a little. I guess it sends the data to all the receivers, kind of like an IP broadcast?
10-02-2010 5:48 PM
Essentially yes, all the STBs in the house receive the same data but only pick out what they want. So that's why it's sort of important to try and keep STBs and computers on separate segments, a bandwidth crunch can really come about if you don't.
08-26-2013 3:37 PM - edited 08-26-2013 3:39 PM
08-26-2013 3:43 PM
09-24-2014 5:47 AM
I am having the same issue, and i am sure I am doing the smae thing you did, can you explain to me how did you fix it?
I experience the problem when I connect my wireless router (airport extreme), between my ATT modem and my main DVR,
09-24-2014 5:49 AM
could you help me? I have a similar issue with my tv freezing every 10 seconds
09-24-2014 6:18 AM
@niconieto , your problem is that you have connected your DVR and/or other TV Receivers back to the RG through your Airport Extreme. The AE (like most consumer routers) doesn't know how to handle the multicast traffic and IGMPv3 requests necessary for U-verse IPTV.
09-24-2014 6:45 AM
09-24-2014 7:08 AM
The AE apparently doesn't handle the IGMPv3 protocol correctly. I know it has that option, and there's an ASUS router with similar options, but I've not heard from anyone that they actually work properly.
You can connect the TV receivers via a Gigabit switch, but not via a router. You should also not connect them to the same switch that your AE is connected to (because the multicast traffic may cause the AE issues with networking).
10-19-2014 11:44 PM
10-20-2014 4:34 AM
Assuming you have the devices connected as you described (all three connected directly to the Residential Gateway (the NVG 589), I would unplug the power cord for the RG, the WAP and the wireless receiver, then plug them back in, in that order.
If that doesn't work, you can try http://ufix.att.com , it may have a suggestion. If it doesn't, I'd try clicking this U-verse Customer Service link to send a Private Message (PM) to the AT&T customer service team to help you resolve your issue. You can expect a reply via return PM (the blue envelope in the upper right hand corner of this site, next to your name and avatar) in a business day or three.
This is a group of U-verse service specialists who are knowledgeable about U-verse and will stay with your problem until the end (instead of forgetting about it when the phone hits the cradle). Speed things up by including your Billing Account Number, and the best time and way to reach you.
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