Router lagspiking

85 Orc Warrior
7800
Here's my router: (Netgear WNDR3400). http://www.amazon.com/Factory-Refurbished-NETGEAR-WNDR3400-Wireless-N/dp/B0085WN7YQ/ref=sr_1_2?ie=UTF8&qid=1360524304&sr=8-2&keywords=wndr+3400

My router seems to "choke" for brief periods of time, maximum 10 seconds. In this time, my internet goes out but then it comes right back after 1-2 seconds. This makes it hard to play WoW, because my latency also skyrockets.

I know it's my router because my ISP has replaced my modem twice already. The second time they replaced it everything was fine but now the problem has returned, which points to the router.

Before I go buy a new one, is there anything I can do to my Netgear WNDR3400 to make it function properly, maybe a new firmware? I bought it refurbished a year ago so it's bound to have problems now.
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90 Draenei Shaman
9870
if you replace the router and that doesnt work it may be the copper wires outside your house are eroding and you'll have to have the cable company come out & repair them. if they dont do it threaten to cancel. that'll cost them more than the wires so they'll do it.
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90 Draenei Shaman
9870
also are you gaming on wireless? no just no. dont do that if u are. lol

and it also might be your network card in your computer
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85 Worgen Druid
9600
Have you tried without the router connected to make sure it's not the modem or your connection? If it isn't then all I can think of is that your router keeps assigning your computer new IP addresses which is making it drop. Unless it's what was stated above :).
Edited by Darknessclaw on 2/10/2013 11:42 AM PST
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85 Orc Warrior
7800
I tried the modem direct connection only, and it still lag spikes. Gonna call my ISP so they can check the cables.
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90 Draenei Shaman
9870
also keep in mind it may be your network card... wether its integrated or not it can still go bad after a few years of use.

http://www.newegg.com/Product/Product.aspx?Item=N82E16833166005

this would fix the problem if thats the case for $9 free shipping
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85 Orc Warrior
7800
Ok back few things:

-So I noticed my TV was getting a bit fuzzy when watching it (due to lag) so I called Comcast and asked them to send a tech out for the internet issue stuff as well. I told them that my line cables (the ones you screw in) for the computer AND TV are all connected to a splitter.

So they thought the splitter was the problem I replaced it and all was good for 2 days and now the short spikes have returned AND the TV lag has returned as well. This is really frustrating.

So now considering both issues are back should I call Comcast and get them to check the wiring outside? Because I think the network card isn't the issue since the TV is affected as well.
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85 Worgen Druid
9600
Ok back few things:

-So I noticed my TV was getting a bit fuzzy when watching it (due to lag) so I called Comcast and asked them to send a tech out for the internet issue stuff as well. I told them that my line cables (the ones you screw in) for the computer AND TV are all connected to a splitter.

So they thought the splitter was the problem I replaced it and all was good for 2 days and now the short spikes have returned AND the TV lag has returned as well. This is really frustrating.

So now considering both issues are back should I call Comcast and get them to check the wiring outside? Because I think the network card isn't the issue since the TV is affected as well.


Go to your modem page by putting the correct address in your browser and post your downstream and upstream power levels and downstream SNR.

Modem Pages -
Cisco:
http://192.168.100.1
Motorola:
http://192.168.100.1
Comcast Arris and SMC Gateways/EMTAs: - Arris EMTAs may be http://192.168.100.1 but not sure
http://10.0.0.1 (Username: Admin / Password: Password)
Zoom:
http://192.168.100.1 (Username: Admin / Password: Password)
Edited by Darknessclaw on 2/13/2013 5:11 PM PST
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85 Orc Warrior
7800
Here's a screenshot with the info you need: http://gyazo.com/354955f6399961aa9cd8b3682b82a4bd

Comcast is coming tomorrow. But I appreciate the help with the modem, in case Comcast's cable-fixing might not do the trick.
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85 Worgen Druid
9600
Ouch, still only using a Docsis 2 modem?

Anyway, your problem is that your downstream is decent(0 is the best and you should remain within -10 through 10 for best results) but your upstream power level is little too high and near the higher end.

Is there only one splitter? If there are more, try to remove some. Also, did you make sure to buy a high quality splitter and not a cheap one?

More splitters usually make your upstream power level increase and your downstream power level decrease.

Some splitters state on it how much of a power level change it would be.

If it's not a problem inside then it's probably outside.
Edited by Darknessclaw on 2/13/2013 7:40 PM PST
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85 Orc Warrior
7800
Yeah there's only one splitter (it's 5-1000mhz), this a picture of how it's connected:

http://i.imgur.com/is968mc.jpg - The modem cable is the bottom right one and the TV one is the bottom left one.

So the modem downstream affects the TV as well?
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85 Worgen Druid
9600
Yeah there's only one splitter (it's 5-1000mhz), this a picture of how it's connected:

http://i.imgur.com/is968mc.jpg - The modem cable is the bottom right one and the TV one is the bottom left one.

So the modem downstream affects the TV as well?


Well the TV and modem would have the same specs if they had similar cable conditions. The modem wouldn't really cause anything with the TV but they're both probably getting the same signals if they were hooked up to the same thing.

Your TV is going to have a 7dB drop and your modem will have a 3.5dB drop in signal with downstream power level and increase with upstream based off the ports on the splitter if I'm correct.

How much longer till Comcast comes?

Even if you remove the splitter you would still have okish signals but your upstream would be near the high end but would be the "Good enough" zone.

When the person comes you should ask if they have any splitters on them because they usually carry the high quality ones.

Do you rent your modem? Should also see if they could upgrade you to a Docsis 3 modem while they're there if you're renting.

If you're not renting I suggest you upgrade to a Docsis 3 modem as Comcast will soon be putting Docsis 2 modems as "End of life"

Here is a modem to buy if you're not currently renting a modem or have Xfinity Voice:
http://www.bestbuy.com/site/Motorola+-+SURFboard+DOCSIS+3.0+High-Speed+Cable+Modem/7534146.p?id=1218849840013&skuId=7534146
Edited by Darknessclaw on 2/14/2013 11:08 AM PST
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85 Orc Warrior
7800
Ok so Comcast came 2 days ago and this time they did something VERY different.

The technician took the extra time to check the connections that run ALL the way up to the attic, he found there were some problems up there and he fixed them as well as replacing my splitter for a better one (I'm assuming).

I'm going to monitor my internet for the next few days and if something goes wrong again .. the next thing is either my router or my nettwork card on my mobo right?

Thanks for the help so far Darkness. And I'll have to ask if I'm renting a modem.. I think I am cause comcast charges me every month for internet but maybe the modem rental is included in that fee.
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85 Worgen Druid
9600
Ok so Comcast came 2 days ago and this time they did something VERY different.

The technician took the extra time to check the connections that run ALL the way up to the attic, he found there were some problems up there and he fixed them as well as replacing my splitter for a better one (I'm assuming).

I'm going to monitor my internet for the next few days and if something goes wrong again .. the next thing is either my router or my nettwork card on my mobo right?

Thanks for the help so far Darkness. And I'll have to ask if I'm renting a modem.. I think I am cause comcast charges me every month for internet but maybe the modem rental is included in that fee.


If you received your modem from Comcast then you're renting it for $7 per month. If you bought it yourself then you own it.

Can you post your modem stats now since he left?
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85 Orc Warrior
7800
What exactly do you want from it? Where can I find said "stats"? Do you need a picture of the bottom of the modem?

Here's a picture of the new splitter: http://i.imgur.com/hwAo461.jpg (Again right one is internet modem, left is TV).

edit: I can't beleive this.. lagspiked again. Maybe the new splitter isn't so good?
Edited by Stoneshield on 2/16/2013 12:17 PM PST
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85 Worgen Druid
9600
What exactly do you want from it? Where can I find said "stats"? Do you need a picture of the bottom of the modem?

edit: I can't beleive this.. lagspiked again. Maybe the new splitter isn't so good?


Modem stats are just the thing you posted had a picture of before :).

It's probably an outside or modem problem if they changed everything inside and it's not working right.
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85 Orc Warrior
7800
New stats: http://gyazo.com/9c546d87ab7f590db5a4cc0f4b6252e0

Oh and the last Comcast guy, (and the past 2-3 ones) have all said my signal strength outside is excellent. So can't be outside.

I'm going to connect my internet through the modem only, no router. Just to see what happens. If it spikes again, I'll report back. Stats are the same when modem is directly connected.
Edited by Stoneshield on 2/16/2013 12:31 PM PST
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85 Worgen Druid
9600
After he arrived your modem stats slightly improved on the upstream and a lot on the downstream. Downstream signal is great and upstream is still "Good enough" but near the high end.

Good luck :)
If it's your:
Modem: Might as well get a Docsis 3. If your area has multiple upstream it may be a band aid.
Inside cabling: Idk :/. Are all the cables labeled as "RG-6" on them?
Anything else: /Shrug

Here's my signals for an example
Downstream Channels

Power Level: / Signal to Noise Ratio:
Channel 1*: 4.2 dBmV / 41.2 dB
Channel 2*: 4.2 dBmV / 40.7 dB
Channel 3*: 4.5 dBmV / 40.8 dB
Channel 4*: 4.0 dBmV / 40.6 dB
Channel 5*: 3.6 dBmV /40.2 dB
Channel 6*: 4.3 dBmV / 40.4 dB
Channel 7*: 2.5 dBmV / 40.0 dB
Channel 8*: 2.3 dBmV / 39.9 dB

*QAM256
--------------------------------------------------------------------------------

Upstream Channels
Power Level:
Channel 1: 40.5 dBmV - QAM64
Channel 2: 42.0 dBmV - QAM64
Channel 3: 0.0 dBmV (These are 0 because my area doesn't have over 2 upstream channels)
Channel 4: 0.0 dBmV

What you want is to be closest to 0 downstream power level as you can. High 30s to about 47ish upstream power level is best.
Edited by Darknessclaw on 2/16/2013 2:50 PM PST
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85 Orc Warrior
7800
So if the lagspikes continues w/ the modem.. it's the modem, and if it doesn't it's the router?

What about the network card failing on my mobo like the first few posters suggested and told me to buy : http://www.newegg.com/Product/Product.aspx?Item=N82E16833166005

I can tell you this for sure though: Before this ever started happening I was installation a water cooler in my PC, and I had to open and re-install the motherboard a couple thousand times and bumped it a few times as well. This issue started happening immediately AFTER that. So could it be this? The mobo's network card, and if so is that card they linked good enough?
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85 Worgen Druid
9600
First question, possibly.

Well it's possible it could go bad but not very likely. You never know though. Your upstream is not that great but it may not even be your signals causing the problem and could be something simple like the adapter(Like you said).

Might as well buy http://www.bestbuy.com/site/Motorola+-+SURFboard+DOCSIS+3.0+High-Speed+Cable+Modem/7534146.p?id=1218849840013&skuId=7534146 though.

Your modem is going to be forced to be replaced soon and might as well get ready. Should buy it then return(If your bill says your renting a modem) your current one or just keep it(If you own it and bought it yourself) in case something ever happens. You also cannot get IPV6 until you get a Docsis 3 or higher modem and your area becomes compatible. Also, if you ever plan to get a tier over Performance then you'll probably want a Docsis 3 anyway.
Edited by Darknessclaw on 2/16/2013 3:01 PM PST
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