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Horrible lag spikes. Doesn't seem like my fault, what can I do?

Frequent Visitor

Horrible lag spikes. Doesn't seem like my fault, what can I do?

About a month ago I was suffering from horrible lag spikes for a few days. I left the house for about 6 hours and figured it would be fixed by the time I got home, I get back and it's just as bad, so I tried restarting my computer, resetting the router and modem (my computer is wired, by the way), checking all of the cables, resetting the modem about 5 more times, bypassing the router completely, and connecting on a different computer. The horrible lag remained. So I contacted Comcast support and person #1 claimed there was nothing wrong and to try resetting my modem...I said I already did that so they sent some magical signals to give new life to my modem (I assume they just reset it) and said that it should be fine now, even though they claimed nothing was wrong with it in the first place. I disconnect the conversation, problem persists. I wait until the next day, same problem, contact a new person, they do the same thing and tell me exactly how to reset the modem and check the cables (the same thing I had already done over half a dozen times) and that it should be fine now. The problem persists. I look into Verizon internet thinking about switching, sleep for the night, and the next day the problem is magically fixed. I didn't do anything else that might have fixed it, it was just fixed, so it must have been something on Comcast's end.

 

Now I'm stuck with the same problem. I'm playing an online game and I begin getting horrible lag spikes, going from (according to the in-game ping tracker) 88ms to 300ms to 750ms to 80, 90, 92, 95, 370, 560, 800, and repeat. I think maybe it's the game, so I try watching some youtube videos, problem persists. Even just connecting to google over and over it connects quickly a few times in a row then painfully slow a few times. I reset the modem a few times, problem persists, checked the cables, problems persist, check the internet and see that many other people are having the same problem (not old posts, they are in July 2012) for seemingly no reason other than Comcast is screwing up somehow. I went to pingtest and got 3% packet loss, 65ms ping, 75ms jitter, then I tested again and again and again, which only confirmed that I'm suffering horrible lag spikes. The results were: 1% 50 21, about the same x4, 1% 210 73, 0% 174 34, 3% 230 60, I wait a few minutes, 1% 45 17.

 

So I went to cmd and did ping -t www.comcast.net

I'll spare the huge copy paste and give a quick rundown of the results:

18-70 x~30, timed out, 18-70x~30, timed out, 364, 30, 33, 32, 381, 136, 77, 130, 170, 209, 265, 259, 319, 288, 347, 135, 67, 76, 120, 157, 59, 89, 133, 202, 186, 256, 257, 325, 312, 373, 394, 401, 176, 212, 120-200x~80 (with a few timeouts here and there). [As of typing this I'm running the ping test and I've been back down to the sub-100s for a few minutes].

 

So it looks like Comcast is just having horrible lag spikes and many people have been suffering through it for a few weeks. Is this a known issue? Are there any plans to fix it? Can I please have the stable fast internet that I pay for? If there's anything I can do other than the typical "reset this, it's probably your router or computer's fault, we're sending signals to your modem, ok it's fixed (but not really)" please let me know, but it seems like all I can do now is sit here and hope Comcast hurries up and fixes whatever the problem is.


Accepted Solutions
Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

YAY - SUCCESS!!  After a week of having my cable modem plugged into a line conditioner (see post above for the one I bought) set to 120V, I can say that my signal is now perfect.  15-30 ms lag, no spikes, for a week.  Possible that all the other things that were tried contributed, but this last thing is what nailed it.


All Replies
New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Same problem here!

I had this problem since June 27th, which is about 3-4 weeks ago.. Went through 6 different representatives and 2 technicians over at my house and it did no help..

Heres all the things I've tried since then. Not counting those remote stuffs the representatives did over phone call and live chat.

 

*System restore as soon as I got the problem

*2 full system reformat on both of my hard drives.

*Using a different modem provided by comcast techinician over at my house.

*Hard wire to modem by it self without wireless router.

*Technician had changed NEW WIRES outside of my house

*Using a different ethernet cable.

 

Problem still exist as of TODAY. I'm this close from pulling the trigger to terminate this ISP services..

 

Watch me ping www.comcast.net 50 times.. The average/stable ping SHOULD BE 17-20ms from my previous observation before this.

 

Pinging www.comcast.net [96.6.46.83] with 64 bytes of data:

Reply from 96.6.46.83: bytes=64 time=19 TTL=59 seq=1
Reply from 96.6.46.83: bytes=64 time=72 TTL=59 seq=2
Reply from 96.6.46.83: bytes=64 time=51 TTL=59 seq=3
Reply from 96.6.46.83: bytes=64 time=58 TTL=59 seq=4
Reply from 96.6.46.83: bytes=64 time=107 TTL=59 seq=5
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=6
Reply from 96.6.46.83: bytes=64 time=88 TTL=59 seq=7
Reply from 96.6.46.83: bytes=64 time=28 TTL=59 seq=8
Reply from 96.6.46.83: bytes=64 time=23 TTL=59 seq=9
Reply from 96.6.46.83: bytes=64 time=34 TTL=59 seq=10
Reply from 96.6.46.83: bytes=64 time=34 TTL=59 seq=11
Reply from 96.6.46.83: bytes=64 time=31 TTL=59 seq=12
Reply from 96.6.46.83: bytes=64 time=17 TTL=59 seq=13
Reply from 96.6.46.83: bytes=64 time=20 TTL=59 seq=14
Reply from 96.6.46.83: bytes=64 time=22 TTL=59 seq=15
Reply from 96.6.46.83: bytes=64 time=59 TTL=59 seq=16
Reply from 96.6.46.83: bytes=64 time=28 TTL=59 seq=17
Reply from 96.6.46.83: bytes=64 time=24 TTL=59 seq=18
Reply from 96.6.46.83: bytes=64 time=35 TTL=59 seq=19
Reply from 96.6.46.83: bytes=64 time=19 TTL=59 seq=20
Reply from 96.6.46.83: bytes=64 time=108 TTL=59 seq=21
Reply from 96.6.46.83: bytes=64 time=23 TTL=59 seq=22
Reply from 96.6.46.83: bytes=64 time=38 TTL=59 seq=23
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=24
Reply from 96.6.46.83: bytes=64 time=19 TTL=59 seq=25
Reply from 96.6.46.83: bytes=64 time=41 TTL=59 seq=26
Reply from 96.6.46.83: bytes=64 time=24 TTL=59 seq=27
Reply from 96.6.46.83: bytes=64 time=28 TTL=59 seq=28
Reply from 96.6.46.83: bytes=64 time=28 TTL=59 seq=29
Reply from 96.6.46.83: bytes=64 time=95 TTL=59 seq=30
Reply from 96.6.46.83: bytes=64 time=32 TTL=59 seq=31
Reply from 96.6.46.83: bytes=64 time=47 TTL=59 seq=32
Reply from 96.6.46.83: bytes=64 time=19 TTL=59 seq=33
Reply from 96.6.46.83: bytes=64 time=16 TTL=59 seq=34
Reply from 96.6.46.83: bytes=64 time=64 TTL=59 seq=35
Reply from 96.6.46.83: bytes=64 time=35 TTL=59 seq=36
Reply from 96.6.46.83: bytes=64 time=62 TTL=59 seq=37
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=38
Reply from 96.6.46.83: bytes=64 time=21 TTL=59 seq=39
Reply from 96.6.46.83: bytes=64 time=48 TTL=59 seq=40
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=41
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=42
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=43
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=44
Reply from 96.6.46.83: bytes=64 time=26 TTL=59 seq=45
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=46
Reply from 96.6.46.83: bytes=64 time=18 TTL=59 seq=47
Reply from 96.6.46.83: bytes=64 time=17 TTL=59 seq=48
Reply from 96.6.46.83: bytes=64 time=39 TTL=59 seq=49
Reply from 96.6.46.83: bytes=64 time=26 TTL=59 seq=50

Ping statistics for www.comcast.net
Packets: Sent = 50, Received = 50, Lost = 0 (0% loss),
Approximate round trip times in milliseconds:
Minimum = 16, Maximum = 108, Average = 35

 

I could careless about what the average or top speed is.. This ping above is like a roller coaster ride.

 

fix this ASAP??


 



 

 

 

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I navigated to this forum having the same problem.  Playing online games, my lag goes from about 15-50 ms to 500, 8000....just for a second or two, then back down.  But meanwhile, everyone in my raid group is dying because I miss those critical heals.  I am not a happy camper.

 

I finally activated my cell phone as a Verizon 4G hotspot.  That took care of the problem.  The signal is strong and good, and while the lag is more because it has to travel through air, I'll take 100 ms lag steady any day over 15 ms lag that's spiking to 500 or 8000 every minute or so.  Anything above 250 kills me.

 

It's sad that my tiny cell phone is now outperforming my $130/month or so Comcast service.  We use Comcast for TV and internet, but there's no real reason to keep it unless we can get solid internet.  We don't really watch TV much, and most of what we watch, can be gotten through the internet.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I am having the same problems man they said Everything is fine having a technician to come over but I doubt that will do anything I updated my modem firmware

 

Reply from 23.49.56.169: bytes=32 time=1760ms TTL=58
Reply from 23.49.56.169: bytes=32 time=1592ms TTL=58
Reply from 23.49.56.169: bytes=32 time=290ms TTL=58
Reply from 23.49.56.169: bytes=32 time=109ms TTL=58
Reply from 23.49.56.169: bytes=32 time=71ms TTL=58
Reply from 23.49.56.169: bytes=32 time=50ms TTL=58
Reply from 23.49.56.169: bytes=32 time=228ms TTL=58
Reply from 23.49.56.169: bytes=32 time=199ms TTL=58
Reply from 23.49.56.169: bytes=32 time=329ms TTL=58
Reply from 23.49.56.169: bytes=32 time=15ms TTL=58

 

Im about to switch companies if this doesnt fix in the next week.

Regular Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Ive been having the same issue since saturday. Pinging the first hop, my local router i guess, I get 10ms pings, and then every 5-10s I get a 1000+ ms ping or no response. Which kills online gaming of course. Tech reset my modem, didnt help, someone is scheduled to come out tommorow, then ill update.

 

Disabled all my apps, tried another pc, so its not my pc afaik. Cable has also been acting up, channel will be available shortly.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

My ping results look similar to those posted above. I've been having this issue for about a month now, but it severely acts up during the evening/night time. What about you guys? Does it happen during the evening? Where do you live? I'm in south florida.

 

Ive been through 3 techs and countless calls and nothing resolved yet. 

 

EDIT: Here is what a ping to google.com looks like.

 

Reply from 74.125.45.103: bytes=32 time=31ms TTL=52
Reply from 74.125.45.103: bytes=32 time=33ms TTL=52
Reply from 74.125.45.103: bytes=32 time=48ms TTL=52
Reply from 74.125.45.103: bytes=32 time=31ms TTL=52
Reply from 74.125.45.103: bytes=32 time=30ms TTL=52
Reply from 74.125.45.103: bytes=32 time=33ms TTL=52
Reply from 74.125.45.103: bytes=32 time=114ms TTL=52
Reply from 74.125.45.103: bytes=32 time=29ms TTL=52
Reply from 74.125.45.103: bytes=32 time=48ms TTL=52
Reply from 74.125.45.103: bytes=32 time=108ms TTL=52
Reply from 74.125.45.103: bytes=32 time=36ms TTL=52
Reply from 74.125.45.103: bytes=32 time=54ms TTL=52
Reply from 74.125.45.103: bytes=32 time=32ms TTL=52
Reply from 74.125.45.103: bytes=32 time=34ms TTL=52
Reply from 74.125.45.103: bytes=32 time=31ms TTL=52
Reply from 74.125.45.103: bytes=32 time=31ms TTL=52
Reply from 74.125.45.103: bytes=32 time=32ms TTL=52
Reply from 74.125.45.103: bytes=32 time=122ms TTL=52
Reply from 74.125.45.103: bytes=32 time=45ms TTL=52
Reply from 74.125.45.103: bytes=32 time=35ms TTL=52
Reply from 74.125.45.103: bytes=32 time=30ms TTL=52
Reply from 74.125.45.103: bytes=32 time=111ms TTL=52
Reply from 74.125.45.103: bytes=32 time=32ms TTL=52
Reply from 74.125.45.103: bytes=32 time=31ms TTL=52
Reply from 74.125.45.103: bytes=32 time=31ms TTL=52
Reply from 74.125.45.103: bytes=32 time=32ms TTL=52

 

Is it normal to have such spikes like that? Mostly around 30ms and then a bunch of 100+ms spikes? What does a normal ping test latency variation look like?

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Reply from 173.194.37.69: bytes=32 time=130ms TTL=54
Reply from 173.194.37.69: bytes=32 time=28ms TTL=54
Reply from 173.194.37.69: bytes=32 time=27ms TTL=54
Reply from 173.194.37.69: bytes=32 time=28ms TTL=54
Reply from 173.194.37.69: bytes=32 time=28ms TTL=54
Reply from 173.194.37.69: bytes=32 time=30ms TTL=54
Reply from 173.194.37.69: bytes=32 time=28ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=28ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=1071ms TTL=54
Reply from 173.194.37.69: bytes=32 time=41ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=28ms TTL=54
Reply from 173.194.37.69: bytes=32 time=30ms TTL=54
Reply from 173.194.37.69: bytes=32 time=32ms TTL=54
Reply from 173.194.37.69: bytes=32 time=29ms TTL=54
Reply from 173.194.37.69: bytes=32 time=30ms TTL=54
Reply from 173.194.37.69: bytes=32 time=32ms TTL=54

 

 

Yours isnt a bad spike mine goes over 1k all the time.

 

THIS SUCKS COMCAST REPLY TO US Smiley Sad

Regular Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Well, my problem went away this evening. So ill see what happens.

New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I thought mine did as well, but low and behold after running a pingplot, same old story... 23ms until boom 880ms on all traces. Come on Comcast!

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Same experience here. I'm in South Florida as well and the late June date seems to fit. It seems to be worst in the late afternoon/evening and the packet loss is seen at the very first hop outside of my home network.

 

I've called in and spoke with 5 different support representatives, 1 support manager, had 2 service techs come out, and 1 line tech. They are all baffled, but I can't get the case escalated above the line tech because everything tests ok from his perspective.

 

I managed to convince one of the service techs to put a new, Comcast modem on my cable line (I own mine), but not register it so it remained in the registration/activation quarantine. Interestingly, I replicated the intermittent packet loss and irregular ping times hitting the activation server as well.

 

It's definitely not my hardware, but the question remains as to whether it's the cable transmission equipment/lines or something further down the line.

 

Very frustrating...

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

e92driver, can you say more specifically where you live? I live in the Parkland area. Were you going to try anything next? I have a supervisors number but it sounds like I'd get nowhere. I did mention to one of the techs that a lot of people on this forum were having very similar issues but the guy poo-pooed it. It seriously does sound like theres a problem in the area but nobody can see it. Its the same thing every time.. tech comes out, claims everything is fine, but its not. Replace all equipment, problem still persists.

Contributor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I just got comcast this week and life in Central FL myself.

 

I notice doing ping -t to multipleservers around the same interval each time I get spikes from 110-500ms.

 

I think I maybe made a mistake getting rid of my 24/3 uverse. It was stable, pings only about 5-9ms higher and no darn spikes, in fact my pings on that on a ping -t always changed only 1-2 ms, on comcast they seem to swing about 2-5ms and have this huge spike.

 

My speed seems stable on Blast plan as I get 25/4 constant and 36/5.5 powerboost but this ping thing is not cool for VoIP, Video or FPS games.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I'm down in Fort Lauderdale.

 

I'm giving the line tech a couple more days since he's running some advanced diagnostics, then I'll try and escalate it through some different channel.  Not sure what yet.  I'm getting to the point where I'm ready to switch to DSL and call it a day.  I was willing to be patient, but staying home from work to meet a tech who can't do anything is getting old really quick.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Im also in the Fort Lauderdale Area off 441 and Broward Blvd

 

 

My tech is comming out saturday I know this has something to do with comcast and hour by hour i get more frustrated. This needs to be fixed The spiking ping and packet loss is getting crazy.

New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I think they might've fixed it.. I'm running a pingplotter now and it's stable.  I actually got a call today by some lady with their account management department so they're obviously listening to us down in South Florida. 

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I wish this is my last 15 seconds Smiley Sad

 

Reply from 74.125.137.138: bytes=32 time=30ms TTL=47
Reply from 74.125.137.138: bytes=32 time=30ms TTL=47
Reply from 74.125.137.138: bytes=32 time=32ms TTL=47
Reply from 74.125.137.138: bytes=32 time=2344ms TTL=47
Reply from 74.125.137.138: bytes=32 time=30ms TTL=47
Reply from 74.125.137.138: bytes=32 time=35ms TTL=47
Reply from 74.125.137.138: bytes=32 time=32ms TTL=47
Reply from 74.125.137.138: bytes=32 time=32ms TTL=47
Reply from 74.125.137.138: bytes=32 time=2994ms TTL=47
Reply from 74.125.137.138: bytes=32 time=32ms TTL=47
Reply from 74.125.137.138: bytes=32 time=31ms TTL=47
Reply from 74.125.137.138: bytes=32 time=37ms TTL=47
Reply from 74.125.137.138: bytes=32 time=33ms TTL=47
Reply from 74.125.137.138: bytes=32 time=31ms TTL=47
Reply from 74.125.137.138: bytes=32 time=70ms TTL=47
Reply from 74.125.137.138: bytes=32 time=1756ms TTL=47
Reply from 74.125.137.138: bytes=32 time=28ms TTL=47
Reply from 74.125.137.138: bytes=32 time=43ms TTL=47
Reply from 74.125.137.138: bytes=32 time=30ms TTL=47
Reply from 74.125.137.138: bytes=32 time=3392ms TTL=47
Reply from 74.125.137.138: bytes=32 time=37ms TTL=47
Reply from 74.125.137.138: bytes=32 time=34ms TTL=47
Reply from 74.125.137.138: bytes=32 time=33ms TTL=47
Reply from 74.125.137.138: bytes=32 time=31ms TTL=47

 

This is making me want to pull my hair out.

New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Me too! Am soo annoyed. Never ever ever had so many problems before leaving Qest (now Century Link). Wishing i had never ever left them! Also, ever since getting comcast, I have this problem with Netgear firewall blocks.  I've done everything you did to fix my lag problem, but comcast insists that it's not the modem but my PC...even though it is only 6 months old, and never had problems before switching to comcast.

New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Nope... They didn't fix it.  I thought I was in the clear for most of the evening then all of a sudden during an online Sc2 game it started lagging all over the place.  I ran a ping plot and it was back to the latency rollercoaster..  It's obviously a universal issue that is happening with comcast subscribers all over South Florida - just type in Lag Spikes Comcast in google and you'll see people complaining about it all over the net.  Everyone says exactly the same thing, lag spikes, call into Comcast to hear all about their "Customer Guarantee" and to please "Grade me with all 5's for the survey", yet nobody can provide me with a solution Smiley Sad

 

It pains me to say this, but if it doesn't improve over the weekend I'm going to be parting ways with Comcast.   

Regular Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Well, so far my problem hasnt returned. When it was occuring it was between my PC and the next hop, the local router I assume. I live in north florida.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Downloaded the free trial version of the "standard" Pingplotter package to see where my lag spike issues were coming from.  Set the destination server as 216.18.99.1, which corresponds to the Kargath server in World of Warcraft (for a list of realm names vs. IP addresses in WoW see http://www.wowwiki.com/US_realm_list_by_datacenter).  It was utterly fascinating.  Each hop is listed with its corresponding lag and packet loss.  There were 12 hops from me to my game server.  Packet loss ranged from 20-70% in each hop (this was averaged over 10 min).  The only "green" or acceptable hop was the first one, from my computer to my wireless router.  

 

You could identify the physical device associated with each hop by entering each IP address listed in Pingplotter into any IP address locator service (e.g., http://www.ipaddresslocation.org/ ).  The worst lag for me (about 2 seconds, or 2156 ms) was in the second hop, i.e., my wireless router trying to speak to my cable modem.  Modem was dead.  Replaced modem; bulk of the problem is now gone.

 

For most of you, it won't be the modem.  But it sure is great to see where the problem really is - you or them, and if them, which node in their system.  You'll get it down to a street address.

 

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I have ping plotted and all hops jump up to the 1000+ region every 10-15 seconds.

 

It isnt one hop.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

So, here's what the ping test looked like before I switched out my cable modem.  You can see the first hop, from my computer to the wireless router, is fine.  The problems begin with the second hop, from my wireless router to the modem.  Every hop after that was also insanely bad.  .Lag was 246-2156 ms at every hop, packet loss was 20-70% at every hop.

 

ping test to Kargath.png

 

after switching out the cable modem, every single hop then turned green:  

 

ping test #2 to Kargath.png

 

 

So the moral of the story is, look for the first bad hop and fix that one.  It might fix everything else.

 

 

 

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

JUst had my tech come out he just left he replaced my drop because it was being obscured by branches.

 

Still having intermittent ping spikes Im gonig to try and replacing my cable modem.

 

If all else fails Im switching companies Smiley Sad and returning my modem.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Has anyone else swapped out their modem and seen their problems disappear? I replaced my modem in March to upgrade to DOCSIS 3 and had the tech try one of his modems in my apartment just a few weeks ago, but it didn't seem to make a difference.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Not to spam the thread, but Gawdz shot me a PM and I had an interesting thought.  Can everyone post their modem model and whether they own it or lease it?

 

I'm curious to see if maybe Comcast pushed out a firmware update that is affecting us but not other customers.

 

I've got a Motorola SB6121 that I bought off Amazon.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Yeah I bought my 6121 and the tech said everything was fine on his PDA and all the signals did look fine i havent T3 timed out since he replaced the drop 4 hours ago. Will be replacing my modem tonight to hopefully fix this ping spikes because when i showed them to him after he replaced the drop he was as confused as me.

Bronze Problem Solver

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Zoom 5341J and yes I own it. Rock solid here...

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Well if there wasnt an outage at 12am on a sunday after I just bought my new zoom 5350 i would be able to figure out if it was a modem problem after the tech replacing the drop but now I have to wait till 5 am for this outage to be fixed as per comcast telling me on the phone after hooking up the modems mac to my account.

 

Will post results tomorrow morning. Smiley Sad

Regular Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

well im having some problems and im not sure if its the same but lately in my online games i play i will freeze up but everything around me will still be going on fine...then about 3 seconds later i can move again and continue on doing what i was doing...i have a network meter that shows a graph and 2 lines one for up and one for down...when this lag accures i quickly alt tab out of my game and notice that both the lines spike really high...the down higher then the up tho....im not sure what could be causing this is it on my end or comcasts they seem to tell me that all the connections are fine and everything i checked both my router and my modems logs and on the modem i noticed a couple time outs but i believe that it was from when i was resetting my modem but im not to sure....these are my modem event logs.....

Date Time Event ID Event Level Description

7/9/2012 5:30  4 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

1/1/1970 0:00 2417164306 6 MDD IP mode Override Mode=0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/11/2012 14:16 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/13/2012 14:03 68010300 4 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/15/2012 7:56 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/17/2012 2:03 68010300 4 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/19/2012 15:05 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

1/1/1970 0:00 2417164306 6 MDD IP mode Override Mode=0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/20/2012 17:54 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/22/2012 4:08 68010300 4 DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/22/2012 8:16 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

1/1/1970 0:00 2417164306 6 MDD IP mode Override Mode=0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/26/2012 8:23 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

1/1/1970 0:00 2417164306 6 MDD IP mode Override Mode=0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/26/2012 12:24 66050206 5 TEK Invalid - Invalid Key Sequence Number;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/26/2012 17:40 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/27/2012 11:34 66050206 5 TEK Invalid - Invalid Key Sequence Number;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

1/1/1970 0:00 2417164306 6 MDD IP mode Override Mode=0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

7/28/2012 5:30 82000200 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

1/1/1970 0:00 2417164306 6 MDD IP mode Override Mode=0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

Regular Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

how do i copy and paste my ping results from cmd prompt?

Contributor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Been having horrible lag spikes here in NJ since about two days ago. I might actually have to quit a game I play because of it and I'm not too happy. I own a Motorola SBG6580. The firmware was updated to version 3.5 the other night. I don't know if it's the firmware or just Comcast in general. I hope to get some answers soon.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Ok well i bought a new modem and hooked it up still the same horrible ping.

 

I talked to a guy and MADE him escalte this to a tech to check out and investigate this issue.

 

They will contact me in the next few hours. I will not stop talking to support until I get this thing fixed.

New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I have been having the same problem for the last 3 weeks. It must ne the Comcast server – they will finally will be out to my home tomorrow.

Expert

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

FWIW, rDNS info / geo locater services can be notoriously inaccurate.

New Poster

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Having the same issue in NH. It all started in late june for me. I get normal ping in World of Tanks then spikes for a second, loss of connection to server for a second then jump back into it. Some days i do not see it and other days it happens all day. I've had a tech out the change the wires, change the fittings and change the modem with no luck. My signal strength is normal, my download speeds are top notch and my ping is normal but it spikes for one second every couple of seconds or sometimes every couple of minutes. There seems to be no rythum to it. I had no trouble after the tech left but the next day it started again.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

OK, so I'm the one who replaced my modem, and the whole thing went away.  What's very interesting is, it went away completely for me, but not my husband operating off of the same connection with his computer.  Now I really have no idea what it is.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

Yeah i replaced my modem they said they would call me and they still havent made contact with me Im going to be replacing comcast now Im sick and tired of this.

 

The ping spikes happen on all my computers wether hard wired or wireless.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I tried other options to contact Comcast, but since about Thursday, things have been much better.  I'm still seeing occasional spikes in ping times, but I'm not getting drops anymore.

 

As long as it stays like this, I'm not going to pursue it any further (except for getting credits on my service for all the hassle).

Contributor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I'm tempted to email as well very soon, since I'm not hearing anything on the forums here, even after posting numerous times on various threads related to this issue.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

We had this problem; I replaced my modem; it went away for me but still was an issue for my husband.  Then it came back, for both of us.  Sometimes you'd get a clean signal for a while, sometimes it'd be horrible lag spikes.  It was driving us nuts.  Over the phone, the "line test" always came up clean, but the customer service rep could pick up our nearly 100%, sporadic, packet loss at the modem if you asked them specifically to ping our modem.

 

The latest thing they've tried fixing (please let me know if this works for any of you) is looking up our administrative settings back at the home office.  Comcast has several tiers of service, and apparently in one location, we were down as having one speed, and in another electronic file, we were put down as having another speed.  The conflicting messages to the modem as to what speed we were operating at, kept screwing up the modem and causing it to lag out erratically.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

One last thing to try:  hooking up a line conditioner between your electrical outlet and the modem.

 

I've posted a number of times on this thread.  Many things tried, many worked for a while.  Running down the list:

 

1.  Replacing Modem

2.  Replacing weather-beaten cables outside the house

3.  Changing the administrative settings back at Comcast so it consistently says we're on the right speed tier

 

Each of these worked for a while, and our lag spike problems went away.  But then it came back.  I finally wondered if all the spiking wasn't really the modem (which is where the ping plots said the problem was), but the electricity coming into the modem.  If the voltage into the modem was spiking, this might be causing the modem itself to have spiky behavior.  So I took a voltmeter and plugged it into a wall outlet to see what we were getting.  The voltage varied by time of day and from moment to moment, from about 118V to about 123V.  The worst lag conditions were when the voltage was in the lower part of the range.  So I bought this line conditioner,

http://www.amazon.com/gp/product/B00009RA60/ref=oh_details_o00_s00_i00, hooked it up to the wal outlet, set it to 120V, and plugged both the cable modem and the router into the back.  At this point, both items were getting a steady 120V -- and for the last 4 days, at least, we have had a really solid signal.  I'll post back in a week once I know if this finally really worked, or was just a temporary fix like the others.  One interesting thing:  when I set the line conditioner to 110V, the cable modem worked somewhat, but router didn't work at all.  So the router needs more than 110V to run.

Frequent Visitor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

YAY - SUCCESS!!  After a week of having my cable modem plugged into a line conditioner (see post above for the one I bought) set to 120V, I can say that my signal is now perfect.  15-30 ms lag, no spikes, for a week.  Possible that all the other things that were tried contributed, but this last thing is what nailed it.

Contributor

Re: Horrible lag spikes. Doesn't seem like my fault, what can I do?

I have had the same problem past 2 weeks. I play WoW and can't raid now since the lag is so huge. Very high latency, screen freezes, internet freezes, d/c's, phone doesn't work. Intermittent...so often times by the time you've reset the modem, called Comcast, waited through their 15 min automated customer service menu, explained the situation...the internet is working again.  But it is still SLOW.  The modem's wifi light often blinks when I am not connected to it at all via wifi.   I always reset the wifi-module when I see that, but it always happens again. I use a Xfinity Dory router provided by Comcast.

 

Have technician coming over this afternoon. Given my past experience with technicians I am not hopeful.They always check the house's line, and that's it.  Is Comcast obligated to replace cables that go from my house to the telephone pole? I live where there are a lot of trees and the last time Comcast was able to fix the problem, they blamed it on "Squirrel-chewed" cables from the telephone pole to my house.  How can I get them to check those cables again?

 



 

 

Contributor

Re: Poor connection issues - unable to game or video conference or stream

I am having the same problem.

Frequent Visitor

Re: Poor connection issues - unable to game or video conference or stream

When the Comcast technician comes to your house, make sure he tests the cable line just as it enters your house.  If the signal is good there, then the problem is inside the house.  If not, it's outside the house. 

 

If the problem is inside your house, offer to plug your computer directly (via Ethernet cable) into the back of the cable modem and demonstrate the problem is still there.  By bypassing the router, this step will prove the problem is not your router - which is probably the only piece of equipment that's owned by you and not Comcast.  Therefore, if the problem persists when you're plugged direclty into the cable modem, it is definitely Comcast's issue to fix.  You can then keep calling different technicians out and they have to solve the problem for you.

 

I still recommend downloading Pingplotter (free trial) and run a trace.  If the first hop (to the wireless router) is green and the second and all subsequent ones are red, the problem is the second hop, your cable modem.  If the problems don't start until the third hop, it's somewhere between your cable modem and the next stop down the street.  Knowing this much can be helpful.  Plus, showing the saved traces (you can collect many over time and store them) to the Comcast technicians helps them to take you seriously.  It becomes clear you are NOT hallucinating when you say you have an intermittent problem.

Frequent Visitor

Re: Poor connection issues - unable to game or video conference or stream

And, yes, they are obligated to replace the lines in the street, if that's the problem.  BUT, they have to call in a separate "line crew" to do that, which is why the guys who come to your house won't be the ones to fix the problem that way.  So, just make sure, if the signal coming into your house is bad, that the technicians put in an order for the line crew before they leave.

 

Expert

Re: Poor connection issues - unable to game or video conference or stream


mayo_in_dc wrote:
If the first hop (to the wireless router) is green and the second and all subsequent ones are red, the problem is the second hop, your cable modem.  If the problems don't start until the third hop, it's somewhere between your cable modem and the next stop down the street. 

FWIW, that's not exactly correct. Cable modems are not directly "the second hop" in a trace as they do not show up in traces. They are transparent bridges as far as that goes.

Frequent Visitor

Re: Poor connection issues - unable to game or video conference or stream

If that's correct, what is being displayed in the trace under the IP address of 69.138.192.1?  This, I thought, was the cable modem address (the router being 192.168.1.1).

Expert

Re: Poor connection issues - unable to game or video conference or stream

If they do indeed respond to ICMP ping packets (some are configured not to, if not a "request timed out" message will be displayed), the second hop after one's home networking router is the CMTS (Cable Modem Temination System) interface at the local headend facility. If no router is being used then the CMTS will be the first hop in a trace. There are no "ifs" about it ! Smiley Wink

Frequent Visitor

Re: Poor connection issues - unable to game or video conference or stream

Interesting.  So a bad second hop (if the first one is your router) means anything could be wrong between your router and the headend equipment maintained by the cable company.  That would include your cable modem, but also the CMTS.