dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
2779
share rss forum feed


IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1
Reviews:
·Verizon Broadban..
·Comcast

[Connectivity] Dropping connections, several tech visits, no res

Click for full size
CM Stats Page
Click for full size
Signal Levels
I have an issue with dropping connections, had several tech visits (all said signal was fine, and I'm still having dropped connections. The modem is an Arris CM820A and was brand new when issued. It has been online for 15 days and has had 6 attempts to obtain an IP address. I am thinking of taking two buses each way tomorrow and waiting in that DMV style line at the Comcast office to swap the modem. I don't know if its the modem or the line coming in. I would schedule another tech but they would say the signal is fine.
--
I've experienced ImOn (when they were McLeod USA), Mediacom, Comcast, and Time Warner. They are much better than broadcast TV.

I have not and will not cut the cord.


gar187er
I do this for a living

join:2006-06-24
Dover, DE
kudos:4

Re: [Connectivity] Dropping connections, several tech visits, no

why didnt you have the tech swap the modem?

have you seen it drop sync?

the dhcp attempts could be during nighttime maintenance work.
i have 12 attempts in 40 days. not saying that means anything, actually quite the opposite.

i see your on wifi, do you have any hardwired machines?
--
I'm better than you!



IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1

It has several DHCP renew warnings and a T3 in recent weeks.



gar187er
I do this for a living

join:2006-06-24
Dover, DE
kudos:4

one t3???

thats NOTHING.



IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1

I do have two modems, one for CDV (which is in the basement) and the Internet modem (which is in the bedroom). I am wondering if it could be a provisioning issue.


voiptalk

join:2010-04-10
Gainesville, VA
reply to IowaCowboy

said by IowaCowboy:

It has several DHCP renew warnings and a T3 in recent weeks.

Could you elaborate more on your initial statement about "an issue with dropping connections" and what that really means. Because DHCP Warnings and a single T3 doesn't fall under that category.


IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1
Reviews:
·Verizon Broadban..
·Comcast

said by voiptalk:

said by IowaCowboy:

It has several DHCP renew warnings and a T3 in recent weeks.

Could you elaborate more on your initial statement about "an issue with dropping connections" and what that really means. Because DHCP Warnings and a single T3 doesn't fall under that category.

I am having issues with the connection working great some times and other times I cannot even load a simple webpage. And I can easily point the finger at Comcast because I'll switch the iDevice over to Verizon LTE (cellular connection) and the same page that won't load on Comcast will load right away when I switch over to cellular. Same with the laptop, Internet won't load on Comcast, switch the wifi over to my VZW mobile hotspot and it will load fine.

If it was not for their low caps, I'd switch my home Internet to VZW Home Fusion. I use mobile broadband while on the go (as I don't trust public hotspots) and when Comcast ain't working.
--
I've experienced ImOn (when they were McLeod USA), Mediacom, Comcast, and Time Warner. They are much better than broadcast TV.

I have not and will not cut the cord.
Expand your moderator at work


Darknessfall
Premium
join:2012-08-17
kudos:5
Reviews:
·Comcast
·AT&T U-Verse

1 edit
reply to IowaCowboy

Re: [Connectivity] Dropping connections, several tech visits, no

Are you sure the problem is at your modem and not your router? You also mention that you're using wireless. Maybe your router's wireless is failing ? I have no clue to be honest though. I can't really see any problem at your modem.



IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1
Reviews:
·Verizon Broadban..
·Comcast

said by Darknessfall:

Are you sure the problem is at your modem and not your router? You also mention that you're using wireless. Maybe your router's wireless is failing ? I have no clue to be honest though.

When you are dealing with Apple hardware, a failure is unlikely. Several of my friends use Apple routers and they have had zero issues with them. We're talking a $179 piece of hardware. If it was a cheap router, I would consider that a possible issue but the numbers on the modem suggest that it is either an issue with Comcast or the modem, especially with the high number of uncorrectables on downstream 4. I am kind of hesitant to swap the modem as I have an 8x4 and would end up with a 4x4 but I am probably going to do that to rule out the modem.

2.4 ghz cordless phones can cause issues with routers but my cordless phone set is a newer Panasonic DECT 6.0. The other unit in my duplex is currently vacant. I can also see (through Apple System Profiler) what frequencies that the other routers (with a visible SSID) are broadcasting on so I changed the channel on my router to one that is not used by the other routers in the area.
--
I've experienced ImOn (when they were McLeod USA), Mediacom, Comcast, and Time Warner. They are much better than broadcast TV.

I have not and will not cut the cord.


NetFixer
Freedom is NOT Free
Premium
join:2004-06-24
The Boro
Reviews:
·Cingular Wireless
·Comcast Business..
·Vonage

said by IowaCowboy:

When you are dealing with Apple hardware, a failure is unlikely. Several of my friends use Apple routers and they have had zero issues with them. We're talking a $179 piece of hardware. If it was a cheap router, I would consider that a possible issue...

Well, there we have it; the definitive answer.

Are you aware that some of us earn(ed) a living replacing enterprise level network equipment that sells for multiple thousands of dollars, but nonetheless still fails quite frequently? As for Apple hardware not failing, I won't bother to contradict that since such heresy would fall on deaf ears.
--
A well-regulated militia, being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.

When governments fear people, there is liberty. When the people fear the government, there is tyranny.


Darknessfall
Premium
join:2012-08-17
kudos:5
Reviews:
·Comcast
·AT&T U-Verse
reply to IowaCowboy

said by IowaCowboy:

said by Darknessfall:

Are you sure the problem is at your modem and not your router? You also mention that you're using wireless. Maybe your router's wireless is failing ? I have no clue to be honest though.

When you are dealing with Apple hardware, a failure is unlikely. Several of my friends use Apple routers and they have had zero issues with them. We're talking a $179 piece of hardware. If it was a cheap router, I would consider that a possible issue but the numbers on the modem suggest that it is either an issue with Comcast or the modem, especially with the high number of uncorrectables on downstream 4. I am kind of hesitant to swap the modem as I have an 8x4 and would end up with a 4x4 but I am probably going to do that to rule out the modem.

2.4 ghz cordless phones can cause issues with routers but my cordless phone set is a newer Panasonic DECT 6.0. The other unit in my duplex is currently vacant. I can also see (through Apple System Profiler) what frequencies that the other routers (with a visible SSID) are broadcasting on so I changed the channel on my router to one that is not used by the other routers in the area.

You can always try to exchange the modem if you wanted but like you said you may get a 4x4. I don't think the modem would change anything though since your modem is probably using channel 4 as it's main channel. I would rule out wireless congestion though since I doubt it would be enough to cause your network to fully stop.

If you decide you want to try another router to see if the issue stops I suggest you buy and try:
»www.bestbuy.com/site/Asus+-+Dual···=6639317

You can also return it if the issue is still there.

medbuyer

join:2003-11-20
kudos:4

1 edit
reply to IowaCowboy

said by IowaCowboy:

When you are dealing with Apple hardware, a failure is unlikely. Several of my friends use Apple routers and they have had zero issues with them. We're talking a $179 piece of hardware.

i don't know what you're smoking but in our manufacturing company, we have both macs and pc's on the network.....

we have one mac that's always a problem child even after repeated attempts to fix it...and yes, we do have an IT dept that's very capable but the macs came into play after our VP who probably smokes the same stuff you do, has so much to say about Apple...

not because it's Apple and costs your newborn child doesn't mean it will not fail. and just because of this, you won't even try isolating it as it maybe the problem child?

EDIT: seeing that you're a complete Apple setup guy, just try another router, heck even another apple router just for the sake of troubleshooting...
Expand your moderator at work


flwpwr

@comcast.net
reply to IowaCowboy

Re: [Connectivity] Dropping connections, several tech visits, no

trying to figure out why both screenshots show comcast modem signal but say they are connected by verizon wireless at the top?

Assuming this is a ipad/tablet and your using both. So you are definitely using wireless to get to a router. A router that has wireless RF in an unsecured air space and is as easy to interfere with as leaving another router not even hooked up to the internet on. Like say a dory, or a wireless phone, or a wireless keyboard and mouse or a wireless speaker, or wireless headphones, or wireless anything as 2.4 Ghz is not reserved for wireless routers, and thus ANY device out there can use them if they so wish. Not just in your house but in your car, neighbors house neighbors car, etc..

I cannot show you the spectrum with everything [its $900 for the piece you need to do that] but we can start with grabbing inSSIDer from metageeks and at least looking for other routers interfering in our channel set. It's free, it will take you all of 5 minutes to get and install, just do it. You should see something like this picture
»www.metageek.net/products/inssider/

You want yours to have NO OTHER entries in its channel set. If that's not possible you want to match your channel with the WEAKEST other signal available.

If this is not enough, you get to consider upgrading to 5Ghz, which fixed the issue for my wife. her laptop already supported it, to my knowledge tablets and smart phones do not, most devices do not, so you have to buy additional cards for each one.

The 5Ghz however has higher attenuation, read the father you are from the router the faster your strength drops. However, given two situations

you are the only 2 people in the room and the other person can only whisper, or you are in dorm room at a loud frat party trying to talk to someone and both can yell in a megaphone, which works better to communicate?

yelling as loud as you can into a megaphone is going to distort your voice so bad no one can understand you anyway and even if they could the loud frat party is going to interfere [even if your name is apple]. Whispering in a quite room you have a lot better chance to hear the person you just can't walk too far away from them.

Wireless communication in the modern age at its best.

This is why wired will always be better.

Which 2 modems do you have btw? If either of them are a dory you need to make sure they are in BRIDGE mode or wireless is disabled [Arris dory].

If the data modem is a dory you just found double NAT. A known issue with apple routers and certain firmwares, and a known issue with all network configs in certain cases, depending on the software being used. Web browsing should not be a big issue, gaming on the other hand, seems to take exception to it.


n_w95482
Premium
join:2005-08-03
Ukiah, CA

Most mid range to high-end smartphones and tablets nowadays are dual-band.
--
KI6RIT



Darknessfall
Premium
join:2012-08-17
kudos:5
Reviews:
·Comcast
·AT&T U-Verse

3 edits

Even interference cannot cause this much of a problem. I can be connected to router 1 and then put my device right next to router 2 on the same channel broadcasting at 400mW and I still didn't have a dropped connection and can still get a "decent" enough connection to use. To have enough interference for that you would have to be right next to the thing that is inferring. Interference wouldn't seize a connection useless.



NetFixer
Freedom is NOT Free
Premium
join:2004-06-24
The Boro
Reviews:
·Cingular Wireless
·Comcast Business..
·Vonage

said by Darknessfall:

Even interference cannot cause this much of a problem. I can put be connected to router 1 and then put my device right next to router 2 on the same channel broadcasting at 400mW and I still didn't have a dropped connection and can still get a "decent" enough connection to use. To have enough interference for that you would have to be right next to the thing that is inferring. Interference wouldn't seize a connection useless.

Yep, my primary and guest routers (both are on the same rack) are on "automatic" for channel selection, but they are almost always only one 2.4ghz channel apart (right now they are on channels 4 and 3), and I have no problems connecting to either one of them. I have also manually put them on the same channel, and had no problems.

OTOH, I found out quite early when I started using 2.4ghz WiFi, that I needed to dump the 2.4ghz wireless phones.
--
A well-regulated militia, being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.

When governments fear people, there is liberty. When the people fear the government, there is tyranny.


IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1
Reviews:
·Verizon Broadban..
·Comcast
reply to IowaCowboy

I actually decided to go back to purchased modems (I own an Arris TM 722G and a Motorola SBG6120 in the D3 category and a handful of D2s and a D1s) and I put the Motorola in the bedroom next to the router and the Arris in the basement where the phone comes in. I may actually buy a Motorola SBG6141 but I am not sure if I should.

The reason I was experimenting with rented equipment is for troubleshooting but I did some rewiring (on my side of the demarc). I rewired the line to the living room and I put all new fittings on the customer side (I used the T&B Snap N Seal fittings). Some of the fittings were "sucked out", which can cause problems.

Everything seems to be working, for now. I have both modems on the first three way splitter then a MoCA trap going to the second three way splitter going to the three TVs. The MoCA trap is for the AnyRoom DVR.
--
I've experienced ImOn (when they were McLeod USA), Mediacom, Comcast, and Time Warner. They are much better than broadcast TV.

I have not and will not cut the cord.



Darknessfall
Premium
join:2012-08-17
kudos:5
Reviews:
·Comcast
·AT&T U-Verse

said by IowaCowboy:

I actually decided to go back to purchased modems (I own an Arris TM 722G and a Motorola SBG6120 in the D3 category and a handful of D2s and a D1s) and I put the Motorola in the bedroom next to the router and the Arris in the basement where the phone comes in. I may actually buy a Motorola SBG6141 but I am not sure if I should.

The reason I was experimenting with rented equipment is for troubleshooting but I did some rewiring (on my side of the demarc). I rewired the line to the living room and I put all new fittings on the customer side (I used the T&B Snap N Seal fittings). Some of the fittings were "sucked out", which can cause problems.

Everything seems to be working, for now. I have both modems on the first three way splitter then a MoCA trap going to the second three way splitter going to the three TVs. The MoCA trap is for the AnyRoom DVR.

Well that's good then. Post back if your issues occur again.


IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
kudos:1
Reviews:
·Verizon Broadban..
·Comcast

said by Darknessfall:

said by IowaCowboy:

I actually decided to go back to purchased modems (I own an Arris TM 722G and a Motorola SBG6120 in the D3 category and a handful of D2s and a D1s) and I put the Motorola in the bedroom next to the router and the Arris in the basement where the phone comes in. I may actually buy a Motorola SBG6141 but I am not sure if I should.

The reason I was experimenting with rented equipment is for troubleshooting but I did some rewiring (on my side of the demarc). I rewired the line to the living room and I put all new fittings on the customer side (I used the T&B Snap N Seal fittings). Some of the fittings were "sucked out", which can cause problems.

Everything seems to be working, for now. I have both modems on the first three way splitter then a MoCA trap going to the second three way splitter going to the three TVs. The MoCA trap is for the AnyRoom DVR.

Well that's good then. Post back if your issues occur again.

Do you think it would be a good idea to upgrade to the 6141 or should the 6120 work just as good.
--
I've experienced ImOn (when they were McLeod USA), Mediacom, Comcast, and Time Warner. They are much better than broadcast TV.

I have not and will not cut the cord.