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Ickerbicker

@shawcable.net

[AB] Internet jitter high

Hello, I've been using Shaw forever but the last year or so, probably less, I've been getting massive jitter spikes at the same time everyday. from about 8pm - 11pm. Yes it's only 3 hours but these are the 3 hours of the day I actually have time to play online games. I have a sneaking suspicion it's just the activity in my area but I'd like to know for sure. Even if it is though, I can't let that shit fly, but I'd like to know before I call in and rage. Any help would be appreciated.


BB250

@shawcable.net
Where are you located in AB?

Testing from Redcliff, AB at Pingtest.net to Lynwood, WA at 9:22pm on BB250 I get this:



Can't complain to mich here.


Talios

@shawcable.net
Here's edmonton at 10:00 pm, honestly I was expecting a lot worse since i usually get 20-30 ms jitter to game servers, huh.



deathwar

join:2011-05-08
Port Alberni, BC
In BC..



Gan3f

join:2003-07-10
Westbank, BC
reply to Ickerbicker
BC. my connection is pretty much garbage.. cant play anything on xbox live,psn or pc.. either high ping or stutter lag.. waste of BB50 connection... all they tell me is high congestion nothing they can do.

i dont download alot of stuff. so i guess my only option at this point is telus, since this connection is unplayable.




IckerBicker

@shawcable.net
reply to Ickerbicker

This isn't even prime time yet, took that at 8pm.


IckerBicker

@shawcable.net
reply to Ickerbicker
Oh and I'm in Edmonton


rustydusty

join:2009-09-29
Red Deer, AB
reply to Ickerbicker


I'm getting a non reading on packet loss. All 3 connections as well...hmm. Might be just a Business side issue, or static issue?


rustydusty

join:2009-09-29
Red Deer, AB
reply to Ickerbicker
Here's another Business BB50, static IP and a completely difference location than first.


kevinds
Premium
join:2003-05-01
Calgary, AB
kudos:3
Reviews:
·Shaw
reply to Ickerbicker
Business 100 using static IP.



@rustydusty - packet loss test will fail, unless you have Sun's Java installed
--
Yes, I am not employed and looking for IT work. Have passport, will travel.


IckerBicker

@shawcable.net
reply to Ickerbicker

Like this is unacceptable. It's on every computer in the house and doesn't change if I go straight from the modem to the PC.

Cornat

join:2011-10-17
Kelowna, BC
reply to Ickerbicker
Have you tried contacting Shaw yet?

ravenchilde

join:2011-04-01
kudos:2
said by Cornat:

Have you tried contacting Shaw yet?

ShawSean is on vacation so you'll have to contact Shaw via chat or twitter.


rustydusty

join:2009-09-29
Red Deer, AB
reply to kevinds
Ahh, yes forgot about that. These are virtual machines, therfore they have never had java installed. Flash is about only thing, and just to do random speed tests.


Talios

@shawcable.net
Looks like I spoke too soon, for the past two days my jitter has become much, much worse,




50 ms of jitter makes games pretty much impossible =/


xShades

@bell.ca
[BC] North Vancouver here on Shaw 100+ and I'm getting horrible Jitter. Download and upload speeds are fine.

One thing I noticed is that when my modem transmits data on the upstream my latency goes through the roof. It seems that the jitter is connected to transmitting data.

Running a constant ping to the first hop outside of my location I'm getting pings from 9ms to 50ms. Thats horrible line quality and worthless for any type of real time gaming or VOIP.

If I push data on the upstream and watch my ping at the same time it spikes all the way to 150-200ms while the data transfers and then settles down to the horrible jittery base.

I have a tech booked to visit on wednesday the 11th of April I'll post back here if they find anything.

ravenchilde

join:2011-04-01
kudos:2
said by xShades :

[BC]
One thing I noticed is that when my modem transmits data on the upstream my latency goes through the roof. It seems that the jitter is connected to transmitting data.

Running a constant ping to the first hop outside of my location I'm getting pings from 9ms to 50ms. Thats horrible line quality and worthless for any type of real time gaming or VOIP.

If I push data on the upstream and watch my ping at the same time it spikes all the way to 150-200ms while the data transfers and then settles down to the horrible jittery base.

Yes. Uploading can have a drastic effect on downloading due to the need of TCP to acknowledge the receipt of packets back to the sender. The rising size of buffers on modern routers (an issue called "buffer bloat") has been shown to be aggravating TCPs reaction to upstream congestion.

»netalyzr.icsi.berkeley.edu/

Netalyzer by ICSI was written to check for buffer bloat and a few other issues and is a good tool to run on your network. It will tell you if your router is being an issue.

My apple airport extreme has almost 1M of upstream buffer which is a pretty bad situation for lag/jitter when uploading AND trying to download using TCP.

If netalyzer shows a large uplink buffer on your router, you might want to do some research for a router with less uplink buffer and try that, or bypass your router and run the test again.

You'd also want to then test your jitter again while bypassed or on a non-buffer-bloated router. This will help you find out if the service is the issue, or if TCP ACK packets being buffered because of your uploading is the issue.

It's my opinion that TCP requires a fairly large amount of upstream bandwidth free to have fast and jitter-free downloading.


xShades

@bell.ca
ravenchilde,

Thanks for the reply but I think your way off target here.

1. I'm not about to install a java app from the web based on a forum post.

2. The Cisco router I am using is an all on one Router and DOCSIS3 modem from Shaw.

3. Small ICMP packets bouncing off a shaw core router one hop from my modem should have a jitter of 1-5ms tops.

4. Light use of the up-channel should not spike ICMP pings to 150ms from 15ms.

5. The router was working fine up until a few days ago.

scouzer

join:2007-10-15
Lloydminster, AB
reply to Ickerbicker
I've got y'all beat lol:



Been like this since last summer, Shaw can't fix. Oh well. I just can't game or use my VoIP phone in the evenings.


avenger07

@speakeasy.net
reply to Ickerbicker
I dont remember seeing anything in Shaw's service agreement that says anything about low ping times and no jitter. If you want to clean fast line then pay for a dedicated line that's not on the Shaw network. You people are forgetting that cable internet is a shared connection. There are lots of people with virus infected computers spamming out traffic on the network. This in turn affects everyone else's ping time and speeds. Since Shaw doesn't believe in blocking ports this problem will never go away.

ravenchilde

join:2011-04-01
kudos:2
reply to xShades
said by xShades :

ravenchilde,

Thanks for the reply but I think your way off target here.

1. I'm not about to install a java app from the web based on a forum post.

Yup. Do what you want.


xShades

@shawcable.net
Shaw runs a network that it sells to its customers.

If that network is in part or fully overloaded in that it causes high latency high jitter communications it will have 2 effects.

1. A huge increase in support calls. Support calls cost money.
2. People will leave and try another service.

I'm giving Shaw the opportunity to retain my business by fixing my issue. If they wont or cant then I move on, no big deal.

In my instance I believe its just some EMI or mis-configured modem that's causing the random jitter. My bandwidth is fine, if it was an over loaded core router I would expect to see a reduction of bandwidth along with the jitter, that is not the case.

DOCSIS 3 modems up-channels are notoriously difficult to tune for a clean signal. I'm hoping the tech that comes today can clean up mine and get rid of this nasty jitter.

ravenchilde

join:2011-04-01
kudos:2
said by xShades :

Shaw runs a network that it sells to its customers.

If that network is in part or fully overloaded in that it causes high latency high jitter communications it will have 2 effects.

1. A huge increase in support calls. Support calls cost money.
2. People will leave and try another service.

I'm giving Shaw the opportunity to retain my business by fixing my issue. If they wont or cant then I move on, no big deal.

In my instance I believe its just some EMI or mis-configured modem that's causing the random jitter. My bandwidth is fine, if it was an over loaded core router I would expect to see a reduction of bandwidth along with the jitter, that is not the case.

DOCSIS 3 modems up-channels are notoriously difficult to tune for a clean signal. I'm hoping the tech that comes today can clean up mine and get rid of this nasty jitter.

I still think you should look into bufferbloat as it sounds a lot like your situation with uploading and jitter/ping time.

Today's Security Now episode (twit.tv) had a Q&A section covering this exact scenario.

Have you tried testing it with your modem/router in bridged mode and directly connected?


Died

@shawcable.net


I'm suffering 5% packet loss suddenly with Shaw....not happy Has made online gaming unplayable, amongst other problems.


XT0RT
S3x, Drugs, War

join:2001-07-28
Edmonton, AB


Must be a noise issue on the node. No problems where I am at.
--
Core i7 2720QM : GTX 485M @ 580M : 8GB DDR3-1333 : 320GB x 2 in RAID 0 : Windows 7 Professional x64 SP1
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