Sign in with
Sign up | Sign in
Your question
Closed

Help! My broadband highspeed internet is running slow

Last response: in Networking
Share
August 21, 2006 2:13:08 PM

i have comcast highspeed internet that i pay twice as much as dsl for. it is advertised to be at least twice as fast as dsl. but it started running very slow recently. i ran a test on pcpitstop and cnet website to test my speed. i am not getting any more than 600 kbps. before, i used to get over 5000 kbps. i thought the problem was my 4 yr old dlink 614+ router so i went and bought a wireless linksys 2.4ghz 802.11g and payed extra for speed booster. my internet speed stayed the same. then i thought the problem was my comcast modem. so i reset it with a pin, but my internet speed was still slow. what can be the problem?

note: i only use a wired connection and i have 4 pcs connected to the router through the cat5 outlets in seperate rooms. my d-link router was also slow before with only 1000 kbps. but after resetting it, i had over 5000 kbps for about a month before my speed became slow again.
August 21, 2006 3:00:59 PM

Your provider probably severely oversubscribed your node. Downstream and upstream bandwidth is shared by all the people on the same node as your are. The more users on the node active at the same time, the slower you get. They could do things like node splits to make the nodes smaller. They could also change downstream and upstream modulation schemes to get more bandwidth.
August 21, 2006 6:42:36 PM

Test the Speeds during different times of the day.
This would be a good way to test if things are over-subscribed.

If it is, you will see better performance at 5am than you do at 8pm.

Also, connect your PC directly to the Cable Modem to eliminate the router completely.

Also try doing a ping -t xxx.xxx.xxx.xxx where this is the Cable Modem's router. Then try it against Yahoo.

If the first is slow, then there could be an issue on your local loop.
If the first is fast but the 2nd is slow, there could be an issue on one of the routers a bit further out.

I would run the tests and then contact comcast with the results.
600KB is not acceptable currently.

I know I had "oversubscription" issues with Cable so I switched to DSL for more speed. My cable was fine except for between say 6pm and 11pm when it dropped way ways down.
Related resources
August 21, 2006 7:46:57 PM

My neighbor was having the same problem with comcast. I tried reseting everthing. Clean the PC of all kinds of little items, internet cache, win temp files ..... Optomize the pc. She had contacted comcast and they reported the modem as slow. What I found was the WAN port on the router and modem was having problem. I ended up blowing everything away and set it back up. Still had a slow connection. What did work was a direct connect to my notebook, for a couple of minutes. Then reconnected to the router and everything went back to normal. Something was hung some where.
October 28, 2009 11:27:28 PM


okay, so if you connect straight to the cable modem, what about those people who have vonage and have to hook up to that via ethernet from cable modem to vonage router.....?
is there a way around this, so they have the phone yet a faster internet upload/download speed?
I know when I had dsl, it was great... could open up mulitple pages for things I was researching.....Now. with cable , I have to wait for pages to upload before I can do anything else?
and Why? does cable share the lines and say its faster than dsl?
how did dsl work compared to what cable is doing??

thanks





zenmaster said:
Test the Speeds during different times of the day.
This would be a good way to test if things are over-subscribed.

If it is, you will see better performance at 5am than you do at 8pm.

Also, connect your PC directly to the Cable Modem to eliminate the router completely.

Also try doing a ping -t xxx.xxx.xxx.xxx where this is the Cable Modem's router. Then try it against Yahoo.

If the first is slow, then there could be an issue on your local loop.
If the first is fast but the 2nd is slow, there could be an issue on one of the routers a bit further out.

I would run the tests and then contact comcast with the results.
600KB is not acceptable currently.

I know I had "oversubscription" issues with Cable so I switched to DSL for more speed. My cable was fine except for between say 6pm and 11pm when it dropped way ways down.

Anonymous
November 4, 2009 11:01:45 PM


Below are tests I made recently from same computer/environment on Comcast.
Note at times I was getting super response !

Fri Oct 30 09:26:27 2009 23986 kbps
Tue Nov 3 12:55:26 2009 17340 kbps





Download Speed: 690 kbps (86.3 KB/sec transfer rate)
Upload Speed: 554 kbps (69.3 KB/sec transfer rate)
Latency: 27 ms
Fri Oct 30 19:59:35 2009


Download Speed: 675 kbps (84.4 KB/sec transfer rate)
Upload Speed: 491 kbps (61.4 KB/sec transfer rate)
Latency: 23 ms
Fri Oct 30 08:40:14 2009

Download Speed: 661 kbps
(82.6 KB/sec transfer rate)
Upload Speed: 526 kbps (65.8 KB/sec transfer rate)
Latency: 20 ms
Fri Oct 30 08:43:13 2009

Download Speed: 654 kbps (81.8 KB/sec transfer rate)
Upload Speed: 473 kbps (59.1 KB/sec transfer rate)
Latency: 21 ms
Fri Oct 30 08:50:56 2009

Download Speed: 592 kbps (74 KB/sec transfer rate)
Upload Speed: 568 kbps (71 KB/sec transfer rate)
Latency: 27 ms
Fri Oct 30 08:58:04 2009

Download Speed: 23986 kbps (2998.3 KB/sec transfer rate)
Upload Speed: 3771 kbps (471.4 KB/sec transfer rate)
Latency: 18 ms
Fri Oct 30 09:26:27 2009

Download Speed: 641 kbps (80.1 KB/sec transfer rate)
Upload Speed: 343 kbps (42.9 KB/sec transfer rate)
Latency: 26 ms
Sun Nov 1 21:28:02 2009

Download Speed: 358 kbps (44.8 KB/sec transfer rate)
Upload Speed: 139 kbps (17.4 KB/sec transfer rate)
Latency: 24 ms
Mon Nov 2 22:48:52 2009

Download Speed: 4768 kbps (596 KB/sec transfer rate)
Upload Speed: 3088 kbps (386 KB/sec transfer rate)
Latency: 20 ms
Tue Nov 3 07:21:04 2009

Download Speed: 601 kbps (75.1 KB/sec transfer rate)
Upload Speed: 437 kbps (54.6 KB/sec transfer rate)
Latency: 24 ms
Tue Nov 3 10:31:18 2009


Download Speed: 4915 kbps (614.4 KB/sec transfer rate)
Upload Speed: 2977 kbps (372.1 KB/sec transfer rate)
Latency: 22 ms
Tue Nov 3 11:31:56 2009

Download Speed: 18055 kbps (2256.9 KB/sec transfer rate)
Upload Speed: 3066 kbps (383.3 KB/sec transfer rate)
Latency: 17 ms
Tue Nov 3 12:55:26 2009

Download Speed: 5308 kbps (663.5 KB/sec transfer rate)
Upload Speed: 1378 kbps (172.3 KB/sec transfer rate)
Latency: 17 ms
Tue Nov 3 13:21:22 2009


Download Speed: 17340 kbps (2167.5 KB/sec transfer rate)
Upload Speed: 1744 kbps (218 KB/sec transfer rate)
Latency: 18 ms
Tue Nov 3 15:07:56 2009

Download Speed: 441 kbps (55.1 KB/sec transfer rate)
Upload Speed: 233 kbps (29.1 KB/sec transfer rate)
Latency: 28 ms
Wed Nov 4 11:24:50 2009

Download Speed: 590 kbps (73.8 KB/sec transfer rate)
Upload Speed: 398 kbps (49.8 KB/sec transfer rate)
Latency: 26 ms
Wed Nov 4 12:06:29 2009

Download Speed: 616 kbps (77 KB/sec transfer rate)
Upload Speed: 513 kbps (64.1 KB/sec transfer rate)
Latency: 26 ms
Wed Nov 4 12:11:03 2009

Download Speed: 391 kbps (48.9 KB/sec transfer rate)
Upload Speed: 446 kbps (55.8 KB/sec transfer rate)
Latency: 28 ms
Wed Nov 4 13:59:43 2009

Download Speed: 391 kbps (48.9 KB/sec transfer rate)
Upload Speed: 360 kbps (45 KB/sec transfer rate)
Latency: 26 ms
Wed Nov 4 14:55:59 2009

Download Speed: 570 kbps (71.3 KB/sec transfer rate)
Upload Speed: 361 kbps (45.1 KB/sec transfer rate)
Latency: 23 ms
Wed Nov 4 15:41:08 2009
April 2, 2010 12:57:55 AM

im haveing this same issue. my DSL at work has way better ping across the WORLD.with no jitter my COMCAST pings well over 275 with 20-60 jitter. when i play games on comcast all i hear is you LAGG when im on DSL nobody complains about me laggin.WTH. I pay twice as much for comcast.:( 
April 15, 2010 4:28:03 PM

Depending on where you're located and what you're doing, you may be in an area covered by ComCasts "throttling" "tests" or they have you pegged as an "access abuser". The latter is especially onerous because they are telling you you cannot use all the capability you are paying for...and I would call them out on it and demand the service I am paying for. I have RoadRunner and, so far, I haven't seen anything like that--though my upload speeds are FAR different (slower) than my download speeds. In my case this is probably due to a retarded computer, though I just discovered it last night and haven't had a chance to check it out.
April 15, 2010 4:33:40 PM

Another thought...check with some of your neighbors and see what speeds they are getting since they are most likely using ComCast service also. If they are about the same as yours then it's probably a system problem somewhere. if yours is the only one that's slow then get on ComCast and demand to know why--threaten legal action for contract issues (lack of specific performance for targeted slow access when you are paying for unlimited access) if necessary to get them to respond. And by ALL means demand a cost rebate for degraded service.
April 17, 2010 5:11:11 AM

I hate lag to




over subscribed nodes, ftl
April 22, 2010 7:03:22 PM

After some further research, it seems that the present system is designed for slower upload speeds than download speeds. That was not usually a problem because our computers download much faster than we can type. However, with the speeds of computers these days, the sizes of files we receive AND send, it is becoming a bottleneck. It is not a bandwidth isue, per se, because the bandwidth exists in both directions, especially on fiber networks. The problem is ISPs not upgrading both sides of the channel--it's cheaper that way for them. Presently, the only real way around it is so-called "business" access, which essentially means they activate high-speed upload capability, for a price. The only way to really end the bottleneck is pressure on ISPs to make up and download speeds more symmetrical, either from disgusted users or from the government mandating it. Lots of luck in either case.
August 20, 2010 11:21:25 AM

I have Optimum online and have an intermittent slow speed down load (<100kbps :(  after the tech replace the modem the issue went away. I ask the tech what's difference about the modem that I got now & the 1 he replaced, and his reply was that the 1 that I have before was for residential and the 1 that he used is for commercial account. I hope this help.
Anonymous
September 5, 2010 12:13:50 AM

if you're having issues with your speed then you're gonna have to have a tech look at it. it will either be your modem or something on your lines (ie bad splitter or bad fitting etc). just so you feel better i can tell you that your downstream signal should be between -5 and +5 dB. your upstream signal should be between 40 and 50 dB. your Bit error rate should be no less than 9 e-7 (preferably it will be e-9 but shouldn't be lower than 7) and your modulated error rate should be no less than 30. don't be afraid to ask the tech about this stuff. i know i wouldn't mind if someone asked me :)  if your signal falls into all these specs then it is definitely your modem. you can type in 192.168.100.1 to access a diagnostics page on most modems that will tell you a lot of this stuff but some modems require a username and password that you could probably google and find if you really wanted to. hope this helps!
March 1, 2011 3:58:10 AM

have anyone tried a ping test???
August 14, 2011 7:55:54 PM

I am on comcast and have recently encountered a similar issue. When I unplug the vonage device, wait a few seconds and plug it back in, all is well again, for about 24 hours or so. This has to be repeated to return to the speeds I am used to receiving.
August 14, 2011 8:33:16 PM

This topic has been closed by The_Prophecy
!