Hi Everyone,
Internet was working perfectly in my place for ~6 months, however for the last 3-4 weeks the internet cuts for 3-5 minutes before coming back on. Let me provide some details about my situation.
I currently pay for Comcast Xfinity internet. I pay for the medium to high tier internet, my download speeds are usually ~10 mb a second, no complaints with speed. I currently use my iPhone, iPad, PC, and Samsung 4k Smart TV wirelessly on my internet connection. I very rarely use all of these items at once however.
I am using a Motorola SURFboard SB6121 modem and a NETGEAR N300 Wireless Router WNR2000 v4. I have had both of these devices for 3 years and never had any issues prior.
THE ISSUE. For the past 3-4 weeks when I am streaming Netflix or Amazon Prime Video on my Samsung Smart TV, the video will play completely fine and then randomly will start buffering and then the internet shuts down. The lights and my modem and router do not change once this happens, however the internet just stops working. I can't play any streaming videos and I can no longer use my WiFi for any of my devices. Now this problem has so far only occured when I am suing my TV and my iPhone, when it does happen though, the internet does not work for any of my devices. I have yet to have the problem start while I am on my computer or my iPad.
Nothing in my setup has changed and was working completely fine for 6 months. Here is what I have done to try and troubleshoot the issue:
1. Have unplugged and reset the router and modem too many times to count. *Note* The internet comes back on when the issues occurs without having to reset my modem or router, it just takes about 3-5 minutes to kick back in.
2. I have reset my router to default settings and changed the Wireless network to something new with a new password. My modem and router also only show my devices as being connected to the wireless network.
3. I have checked the cable connected to my wall for internet and everything seems fine. Cable is straight with no issues.
4. Called Comcast who said there have been no outages reported in my area. I had scheduled for a tech to come to my place, but I missed them. A couple of days later after missing my appointment I saw someone checking the equipment in the area, but have not been able to have a tech over to my place. Not sure what they would be able to do at this point as I have troubleshooted most of the issues inside my apartment.
Here are my modem logs:
Apr 30 2017 09:06:07 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 28 2017 08:11:20 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:10:54 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:10:47 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:28 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:09:47 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:09:47 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:09:46 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:54 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:35 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:17 4-Error U101.0 TCS Fail on all Upstream Channels;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:17 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:17 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:11 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:11 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:10 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:10 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:09 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:45:55 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Can you guys give me guidance as to watch the issue could be or how to fix it? I really do not believe it is my Modem or Router as they worked perfectly and work perfectly before the issue comes up. If the logs show an issue with Comcast's internet can you please point it out so I can bring this up to them.
I am extremely frustrated that this continues to happen and will try whatever you guys throw my way. Thanks for taking the time to read my post. I appreciate your help, this website is a great community.
Internet was working perfectly in my place for ~6 months, however for the last 3-4 weeks the internet cuts for 3-5 minutes before coming back on. Let me provide some details about my situation.
I currently pay for Comcast Xfinity internet. I pay for the medium to high tier internet, my download speeds are usually ~10 mb a second, no complaints with speed. I currently use my iPhone, iPad, PC, and Samsung 4k Smart TV wirelessly on my internet connection. I very rarely use all of these items at once however.
I am using a Motorola SURFboard SB6121 modem and a NETGEAR N300 Wireless Router WNR2000 v4. I have had both of these devices for 3 years and never had any issues prior.
THE ISSUE. For the past 3-4 weeks when I am streaming Netflix or Amazon Prime Video on my Samsung Smart TV, the video will play completely fine and then randomly will start buffering and then the internet shuts down. The lights and my modem and router do not change once this happens, however the internet just stops working. I can't play any streaming videos and I can no longer use my WiFi for any of my devices. Now this problem has so far only occured when I am suing my TV and my iPhone, when it does happen though, the internet does not work for any of my devices. I have yet to have the problem start while I am on my computer or my iPad.
Nothing in my setup has changed and was working completely fine for 6 months. Here is what I have done to try and troubleshoot the issue:
1. Have unplugged and reset the router and modem too many times to count. *Note* The internet comes back on when the issues occurs without having to reset my modem or router, it just takes about 3-5 minutes to kick back in.
2. I have reset my router to default settings and changed the Wireless network to something new with a new password. My modem and router also only show my devices as being connected to the wireless network.
3. I have checked the cable connected to my wall for internet and everything seems fine. Cable is straight with no issues.
4. Called Comcast who said there have been no outages reported in my area. I had scheduled for a tech to come to my place, but I missed them. A couple of days later after missing my appointment I saw someone checking the equipment in the area, but have not been able to have a tech over to my place. Not sure what they would be able to do at this point as I have troubleshooted most of the issues inside my apartment.
Here are my modem logs:
Apr 30 2017 09:06:07 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 28 2017 08:11:20 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:10:54 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:10:47 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:28 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:09:47 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:09:47 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 09:09:46 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:54 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:35 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:17 4-Error U101.0 TCS Fail on all Upstream Channels;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:17 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:17 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:11 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:11 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:10 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:10 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:46:09 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Apr 27 2017 08:45:55 3-Critical R08.0 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=94:cc:b9:cf:6d:94;CMTS-MAC=d0:72:dc:33:33:3c;CM-QOS=1.1;CM-VER=3.0;
Can you guys give me guidance as to watch the issue could be or how to fix it? I really do not believe it is my Modem or Router as they worked perfectly and work perfectly before the issue comes up. If the logs show an issue with Comcast's internet can you please point it out so I can bring this up to them.
I am extremely frustrated that this continues to happen and will try whatever you guys throw my way. Thanks for taking the time to read my post. I appreciate your help, this website is a great community.
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