Internet Speeds Fluctuating 500kbps to 25MBps - Comcast ServiceRouter loses connection to internet...
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Internet Speeds Fluctuating 500kbps to 25MBps - Comcast Service
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I have recently switched to Comcast internet service, coming from Centurylink.
With this new Comcast service, my internet speeds will fluctuate between around 500kbps and 25MBps. This seems to happen throughout the entire day, throughout the entire week - so I don't think it's a time window throttling thing.
I don't have too much knowledge of networking, but it almost seems like windowing... the connection will start low, build up, then drop to 0 - rinse and repeat. This will cause streaming videos to buffer and connections to multiplayer games to disconnect.
Does anyone know why this could happen? Or is there any sort of monitor I can run to see exactly what could be causing the problem?
Additional Info:
Also, I had a Comcast tech come out, and he said the network is fine, everything tests alright. The modem/router is Cisco, and it happens on every device on the network. The router is a Cisco DPC3939 XB3.
networking wireless-networking router internet
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I have recently switched to Comcast internet service, coming from Centurylink.
With this new Comcast service, my internet speeds will fluctuate between around 500kbps and 25MBps. This seems to happen throughout the entire day, throughout the entire week - so I don't think it's a time window throttling thing.
I don't have too much knowledge of networking, but it almost seems like windowing... the connection will start low, build up, then drop to 0 - rinse and repeat. This will cause streaming videos to buffer and connections to multiplayer games to disconnect.
Does anyone know why this could happen? Or is there any sort of monitor I can run to see exactly what could be causing the problem?
Additional Info:
Also, I had a Comcast tech come out, and he said the network is fine, everything tests alright. The modem/router is Cisco, and it happens on every device on the network. The router is a Cisco DPC3939 XB3.
networking wireless-networking router internet
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
1
That it disconnects you from services is notable. that's not just latency, unless the protocol or application are very poorly coded indeed. From what you describe, the issue pretty much has to be at the ISP end. I've occasionally had problems like this when an inexpirenced tech messes up the billing or service codes associated with my account and the cable modem, but it is often difficult to get them to notice or fix it, if that is in fact the issue.
– Frank Thomas
Dec 22 '16 at 4:56
It happens across many different applications, which likely use different protocols. I guess I will have to get back in touch with Comcast.
– user667465
Dec 22 '16 at 6:46
Ouch, this is a hard one. How often does this happen? Is it consistent enough that you can constantly test it? Consider disconnecting all devices bar one (maybe a phone) and test from there - just to rule out any other services, e.g. Windows Update, that might be interfering.
– Bob
Dec 23 '16 at 0:46
add a comment |
I have recently switched to Comcast internet service, coming from Centurylink.
With this new Comcast service, my internet speeds will fluctuate between around 500kbps and 25MBps. This seems to happen throughout the entire day, throughout the entire week - so I don't think it's a time window throttling thing.
I don't have too much knowledge of networking, but it almost seems like windowing... the connection will start low, build up, then drop to 0 - rinse and repeat. This will cause streaming videos to buffer and connections to multiplayer games to disconnect.
Does anyone know why this could happen? Or is there any sort of monitor I can run to see exactly what could be causing the problem?
Additional Info:
Also, I had a Comcast tech come out, and he said the network is fine, everything tests alright. The modem/router is Cisco, and it happens on every device on the network. The router is a Cisco DPC3939 XB3.
networking wireless-networking router internet
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
I have recently switched to Comcast internet service, coming from Centurylink.
With this new Comcast service, my internet speeds will fluctuate between around 500kbps and 25MBps. This seems to happen throughout the entire day, throughout the entire week - so I don't think it's a time window throttling thing.
I don't have too much knowledge of networking, but it almost seems like windowing... the connection will start low, build up, then drop to 0 - rinse and repeat. This will cause streaming videos to buffer and connections to multiplayer games to disconnect.
Does anyone know why this could happen? Or is there any sort of monitor I can run to see exactly what could be causing the problem?
Additional Info:
Also, I had a Comcast tech come out, and he said the network is fine, everything tests alright. The modem/router is Cisco, and it happens on every device on the network. The router is a Cisco DPC3939 XB3.
networking wireless-networking router internet
networking wireless-networking router internet
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
edited Aug 31 '18 at 22:41
Hennes
59.3k793143
59.3k793143
asked Dec 22 '16 at 4:21
user667465
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 9 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
1
That it disconnects you from services is notable. that's not just latency, unless the protocol or application are very poorly coded indeed. From what you describe, the issue pretty much has to be at the ISP end. I've occasionally had problems like this when an inexpirenced tech messes up the billing or service codes associated with my account and the cable modem, but it is often difficult to get them to notice or fix it, if that is in fact the issue.
– Frank Thomas
Dec 22 '16 at 4:56
It happens across many different applications, which likely use different protocols. I guess I will have to get back in touch with Comcast.
– user667465
Dec 22 '16 at 6:46
Ouch, this is a hard one. How often does this happen? Is it consistent enough that you can constantly test it? Consider disconnecting all devices bar one (maybe a phone) and test from there - just to rule out any other services, e.g. Windows Update, that might be interfering.
– Bob
Dec 23 '16 at 0:46
add a comment |
1
That it disconnects you from services is notable. that's not just latency, unless the protocol or application are very poorly coded indeed. From what you describe, the issue pretty much has to be at the ISP end. I've occasionally had problems like this when an inexpirenced tech messes up the billing or service codes associated with my account and the cable modem, but it is often difficult to get them to notice or fix it, if that is in fact the issue.
– Frank Thomas
Dec 22 '16 at 4:56
It happens across many different applications, which likely use different protocols. I guess I will have to get back in touch with Comcast.
– user667465
Dec 22 '16 at 6:46
Ouch, this is a hard one. How often does this happen? Is it consistent enough that you can constantly test it? Consider disconnecting all devices bar one (maybe a phone) and test from there - just to rule out any other services, e.g. Windows Update, that might be interfering.
– Bob
Dec 23 '16 at 0:46
1
1
That it disconnects you from services is notable. that's not just latency, unless the protocol or application are very poorly coded indeed. From what you describe, the issue pretty much has to be at the ISP end. I've occasionally had problems like this when an inexpirenced tech messes up the billing or service codes associated with my account and the cable modem, but it is often difficult to get them to notice or fix it, if that is in fact the issue.
– Frank Thomas
Dec 22 '16 at 4:56
That it disconnects you from services is notable. that's not just latency, unless the protocol or application are very poorly coded indeed. From what you describe, the issue pretty much has to be at the ISP end. I've occasionally had problems like this when an inexpirenced tech messes up the billing or service codes associated with my account and the cable modem, but it is often difficult to get them to notice or fix it, if that is in fact the issue.
– Frank Thomas
Dec 22 '16 at 4:56
It happens across many different applications, which likely use different protocols. I guess I will have to get back in touch with Comcast.
– user667465
Dec 22 '16 at 6:46
It happens across many different applications, which likely use different protocols. I guess I will have to get back in touch with Comcast.
– user667465
Dec 22 '16 at 6:46
Ouch, this is a hard one. How often does this happen? Is it consistent enough that you can constantly test it? Consider disconnecting all devices bar one (maybe a phone) and test from there - just to rule out any other services, e.g. Windows Update, that might be interfering.
– Bob
Dec 23 '16 at 0:46
Ouch, this is a hard one. How often does this happen? Is it consistent enough that you can constantly test it? Consider disconnecting all devices bar one (maybe a phone) and test from there - just to rule out any other services, e.g. Windows Update, that might be interfering.
– Bob
Dec 23 '16 at 0:46
add a comment |
2 Answers
2
active
oldest
votes
I have the same Modem-Router combo and it is a decently powerful modem and my connection seems to be pretty stable and fast.
How are you getting the measurements you're describing?
If you are using wireless, your problems are almost certainly due to signal problems. A poorly shielded microwave oven for example can cause a complete blackout of 2.4GHz communications for several yards around it for the duration that it is running. Have a large number of routers forced to share channels in close proximity (think apartment complex) can cause exactly the problem you describe.
5GHz (supported by your router) has far less interference issues, and is less common than 2.4GHz, and has a larger frequency range to communicate on. The drawback is limited range and poorer penetration of walls/objects meaning lower signal strength at the same distance.
Check your modem-to-isp signal levels here:
(URL is specific to DPC3939 Comcast Modem/Router)
http://10.0.0.1/comcast_network.php
or here:
http://192.168.1.1/comcast_network.php
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
add a comment |
The very recent report from Comcast is showing that they have cleared the speed fluctuating issues happening to their customers and they are coming up with double the speed of their Performance 25 Xfinity Internet tier. This will benefit the Comcast users to experience double the speed for internet without any extra charge.
Source at- https://www.thetripleplay.net/blog/comcast-ups-internet-speeds-for-customers-in-twin-cities/ where they have given the details about this announcement.
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
votes
active
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active
oldest
votes
I have the same Modem-Router combo and it is a decently powerful modem and my connection seems to be pretty stable and fast.
How are you getting the measurements you're describing?
If you are using wireless, your problems are almost certainly due to signal problems. A poorly shielded microwave oven for example can cause a complete blackout of 2.4GHz communications for several yards around it for the duration that it is running. Have a large number of routers forced to share channels in close proximity (think apartment complex) can cause exactly the problem you describe.
5GHz (supported by your router) has far less interference issues, and is less common than 2.4GHz, and has a larger frequency range to communicate on. The drawback is limited range and poorer penetration of walls/objects meaning lower signal strength at the same distance.
Check your modem-to-isp signal levels here:
(URL is specific to DPC3939 Comcast Modem/Router)
http://10.0.0.1/comcast_network.php
or here:
http://192.168.1.1/comcast_network.php
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
add a comment |
I have the same Modem-Router combo and it is a decently powerful modem and my connection seems to be pretty stable and fast.
How are you getting the measurements you're describing?
If you are using wireless, your problems are almost certainly due to signal problems. A poorly shielded microwave oven for example can cause a complete blackout of 2.4GHz communications for several yards around it for the duration that it is running. Have a large number of routers forced to share channels in close proximity (think apartment complex) can cause exactly the problem you describe.
5GHz (supported by your router) has far less interference issues, and is less common than 2.4GHz, and has a larger frequency range to communicate on. The drawback is limited range and poorer penetration of walls/objects meaning lower signal strength at the same distance.
Check your modem-to-isp signal levels here:
(URL is specific to DPC3939 Comcast Modem/Router)
http://10.0.0.1/comcast_network.php
or here:
http://192.168.1.1/comcast_network.php
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
add a comment |
I have the same Modem-Router combo and it is a decently powerful modem and my connection seems to be pretty stable and fast.
How are you getting the measurements you're describing?
If you are using wireless, your problems are almost certainly due to signal problems. A poorly shielded microwave oven for example can cause a complete blackout of 2.4GHz communications for several yards around it for the duration that it is running. Have a large number of routers forced to share channels in close proximity (think apartment complex) can cause exactly the problem you describe.
5GHz (supported by your router) has far less interference issues, and is less common than 2.4GHz, and has a larger frequency range to communicate on. The drawback is limited range and poorer penetration of walls/objects meaning lower signal strength at the same distance.
Check your modem-to-isp signal levels here:
(URL is specific to DPC3939 Comcast Modem/Router)
http://10.0.0.1/comcast_network.php
or here:
http://192.168.1.1/comcast_network.php
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
I have the same Modem-Router combo and it is a decently powerful modem and my connection seems to be pretty stable and fast.
How are you getting the measurements you're describing?
If you are using wireless, your problems are almost certainly due to signal problems. A poorly shielded microwave oven for example can cause a complete blackout of 2.4GHz communications for several yards around it for the duration that it is running. Have a large number of routers forced to share channels in close proximity (think apartment complex) can cause exactly the problem you describe.
5GHz (supported by your router) has far less interference issues, and is less common than 2.4GHz, and has a larger frequency range to communicate on. The drawback is limited range and poorer penetration of walls/objects meaning lower signal strength at the same distance.
Check your modem-to-isp signal levels here:
(URL is specific to DPC3939 Comcast Modem/Router)
http://10.0.0.1/comcast_network.php
or here:
http://192.168.1.1/comcast_network.php
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
answered Dec 22 '16 at 4:43
HydranixHydranix
814410
814410
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
add a comment |
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
We are using only wired connections at the moment.
– user667465
Dec 22 '16 at 6:46
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
I am getting the exact speeds from Steam/Google Chrome download speed meters. Whenever I perform a speed test on a site like Ookla, I get normal speeds (250Mbps down/12Mbps up), although it will usually take a while to actually initiate the test, whereas with other providers it starts instantly.
– user667465
Dec 22 '16 at 6:49
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Try testmy.net I find it to be more accurate and less often paid to accelerate test results by ISPs. Is your DPC3939 overheating by chance?
– Hydranix
Dec 25 '16 at 18:43
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
Had a tech come out (different tech than the first) and he found electrical interference in the lines running to the house. He solved that, which significantly helped the issue, however it still happens, just less often now. My guess is there is more interference coming in from somewhere. He also replaced the DPC3939, used the same model, just a different unit, not sure if that did anything to help the situation or not. Going to have him come back out soon to rerun all the cables coming from the pole to the house, hopefully that will work. I'll update this thread with any interesting findings.
– user667465
Dec 26 '16 at 21:58
add a comment |
The very recent report from Comcast is showing that they have cleared the speed fluctuating issues happening to their customers and they are coming up with double the speed of their Performance 25 Xfinity Internet tier. This will benefit the Comcast users to experience double the speed for internet without any extra charge.
Source at- https://www.thetripleplay.net/blog/comcast-ups-internet-speeds-for-customers-in-twin-cities/ where they have given the details about this announcement.
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
add a comment |
The very recent report from Comcast is showing that they have cleared the speed fluctuating issues happening to their customers and they are coming up with double the speed of their Performance 25 Xfinity Internet tier. This will benefit the Comcast users to experience double the speed for internet without any extra charge.
Source at- https://www.thetripleplay.net/blog/comcast-ups-internet-speeds-for-customers-in-twin-cities/ where they have given the details about this announcement.
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
add a comment |
The very recent report from Comcast is showing that they have cleared the speed fluctuating issues happening to their customers and they are coming up with double the speed of their Performance 25 Xfinity Internet tier. This will benefit the Comcast users to experience double the speed for internet without any extra charge.
Source at- https://www.thetripleplay.net/blog/comcast-ups-internet-speeds-for-customers-in-twin-cities/ where they have given the details about this announcement.
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
The very recent report from Comcast is showing that they have cleared the speed fluctuating issues happening to their customers and they are coming up with double the speed of their Performance 25 Xfinity Internet tier. This will benefit the Comcast users to experience double the speed for internet without any extra charge.
Source at- https://www.thetripleplay.net/blog/comcast-ups-internet-speeds-for-customers-in-twin-cities/ where they have given the details about this announcement.
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
answered Apr 7 '17 at 4:08
Steve LarsonSteve Larson
1
1
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
add a comment |
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
Welcome to Superuser! While we are always appreciative of good answers, we are also leery of new users posting a glowing report of a commercial enterprise with the accompanying helpful link to said enterprise's website. Are you associated with Comcast?
– Stephen Rauch
Apr 7 '17 at 4:30
add a comment |
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That it disconnects you from services is notable. that's not just latency, unless the protocol or application are very poorly coded indeed. From what you describe, the issue pretty much has to be at the ISP end. I've occasionally had problems like this when an inexpirenced tech messes up the billing or service codes associated with my account and the cable modem, but it is often difficult to get them to notice or fix it, if that is in fact the issue.
– Frank Thomas
Dec 22 '16 at 4:56
It happens across many different applications, which likely use different protocols. I guess I will have to get back in touch with Comcast.
– user667465
Dec 22 '16 at 6:46
Ouch, this is a hard one. How often does this happen? Is it consistent enough that you can constantly test it? Consider disconnecting all devices bar one (maybe a phone) and test from there - just to rule out any other services, e.g. Windows Update, that might be interfering.
– Bob
Dec 23 '16 at 0:46