Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




6801 posts

Uber Geek

Trusted
Lifetime subscriber

# 79652 20-Mar-2011 21:30
Send private message

Hi,

I've been having a longstanding problem with my TCL ADSL connection. Most of the time there are no issues, but occasionally (usually a few months apart) I'll start having latency spikes. When I say "spikes", here's an example ping to clear.net.nz:


PING clear.net.nz (203.97.37.85): 56 data bytes
64 bytes from 203.97.37.85: icmp_seq=0 ttl=59 time=23.364 ms
64 bytes from 203.97.37.85: icmp_seq=1 ttl=59 time=23.494 ms
64 bytes from 203.97.37.85: icmp_seq=2 ttl=59 time=125.387 ms
64 bytes from 203.97.37.85: icmp_seq=3 ttl=59 time=125.262 ms
Request timeout for icmp_seq 4
64 bytes from 203.97.37.85: icmp_seq=4 ttl=59 time=1000.847 ms
64 bytes from 203.97.37.85: icmp_seq=5 ttl=59 time=21.961 ms
64 bytes from 203.97.37.85: icmp_seq=6 ttl=59 time=124.071 ms
64 bytes from 203.97.37.85: icmp_seq=7 ttl=59 time=28.735 ms
64 bytes from 203.97.37.85: icmp_seq=8 ttl=59 time=51.855 ms
64 bytes from 203.97.37.85: icmp_seq=9 ttl=59 time=116.216 ms
64 bytes from 203.97.37.85: icmp_seq=10 ttl=59 time=207.827 ms
64 bytes from 203.97.37.85: icmp_seq=11 ttl=59 time=113.800 ms
As you can see, I have a couple of normal readings there in the 20s as well as some in the hundreds and one in the thousands. Pings to other servers such as geekzone.co.nz aren't any better. But as you can also see, it's not giving consistently high pings but is fluctuating all over the place.

I have performed an isolation test and replaced the modem. I have also logged the issue with TelstraClear on multiple occasions. The complication is that the issue will last for a couple of weeks, then appear to fix itself. TelstraClear then closes the ticket as resolved (although I have confirmed that TCL hasn't actually done anything). A few months later, the problem returns and I'm back at square one.

Last year I even tried changing ISP but that ended up making it worse; I changed to Xnet and although my latency to the US (World of Warcraft) was stable over the few weeks that I was with them, it was also significantly higher than what I get on a good day with TCL. Unfortunately switching back to TCL (and getting it set up as a new connection) did not resolve the issue.

What else can I do?

View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
28436 posts

Uber Geek

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  # 450156 20-Mar-2011 21:32
Send private message

Are you cabinetised or on an old ADSL exchange still? The issue is possibly just congestion so it won't change no matter what ISP you're on.

19282 posts

Uber Geek
Inactive user


  # 450159 20-Mar-2011 21:33
Send private message

Move to the US

 
 
 
 




6801 posts

Uber Geek

Trusted
Lifetime subscriber

  # 450165 20-Mar-2011 21:38
Send private message

I'm on an exchange and due to be cabinetised "soon". Do you think that could help?

8035 posts

Uber Geek

Trusted

  # 450214 20-Mar-2011 23:28
Send private message

What do tracert's show?

Start > Run > cmd > tracert [address]



6801 posts

Uber Geek

Trusted
Lifetime subscriber

  # 450509 21-Mar-2011 21:31
Send private message

It seems to be behaving itself at the moment but I'll post some traceroutes if it happens again.

I should also point out that last time it happened, I called my dad (same ISP and exchange) and his connection was behaving normally.

8035 posts

Uber Geek

Trusted

  # 450755 22-Mar-2011 15:01
Send private message

How many computers/devices on your network at home? Could easily be one of your machines/devices saturating upload or download.

After about 80% utilization on a link, you will see increased in latency.. very common to see gamers in flats set up some kind of QoS or rate limiting system.

Eg:




6801 posts

Uber Geek

Trusted
Lifetime subscriber

  # 450756 22-Mar-2011 15:02
Send private message

Normally a few, but I've tried connecting a single computer directly to the modem and it still happens.

 
 
 
 


3912 posts

Uber Geek

Trusted
Lifetime subscriber

  # 451350 24-Mar-2011 10:15
Send private message

I have similar issues on TCL, I'm cabnetised, have previously tried connecting the router directly to the PC and bypassing my home network, using monitoring tools to ensure there is no traffic other than the ICMP on my line, etc etc. Normally only happens during peak hour, and sadly is pretty much guranteed to be cabinet congestion.

Not even TCL's fault, its simply Chorus/Telecom only suppling a pathetic amount of of bandwidth per wholesale connection, instead of something reasonable.





Information wants to be free. The Net interprets censorship as damage and routes around it.




6801 posts

Uber Geek

Trusted
Lifetime subscriber

  # 451352 24-Mar-2011 10:17
Send private message

Well, I'll see what happens once the cabinet goes in. If it is congestion then moving from however many thousand exchange users down to a couple of hundred cabinet users should help :)

3912 posts

Uber Geek

Trusted
Lifetime subscriber

  # 451363 24-Mar-2011 10:45
Send private message

Ironically I never had congestion issues until I was cabnetised.

It's because the cabinet serves a much smaller number of users so its peak bandwidth pool is much lower.

Aggregate handover is 45kbps per user. So if a cabinet serves 300 end users, it's total handover bandwidth pool is only 13.5 Mbps. That's less than my exchange connect speed. So one single user flatlining his connection on a cabinet can cause congestion for every other user.

Chorus provide backhaul aggregate at a rediculous contention level compared to overseas and other access technologies.. The proposed aggregate for FTTH is 1.5Mbps for comparison, which is much more reasonable but still below international standards. We need the aggregate for DSL set around 1Mbps and FTTH around 5Mbps.

*edit* This is my understanding of how this works, i could be wrong, I'm sure someone will correct me if I am.




Information wants to be free. The Net interprets censorship as damage and routes around it.


8035 posts

Uber Geek

Trusted

  # 451487 24-Mar-2011 15:09
Send private message

Backhaul gets your data from the cabinet through Telecom wholesale's network to where your ISP has some gear to handover to.

Handover links are the bit that get the data from Telecom wholesale's network to your ISP's network.

Cabinets have GbE backhaul or better to a data switch in Telecom wholesale's access network.

Handover link dimensioning isn't applied on cabinet backhaul like you decribe only on the handover fibre where the ISP is doing their handover.


3912 posts

Uber Geek

Trusted
Lifetime subscriber

  # 451880 25-Mar-2011 20:44
Send private message

Thanks for that Ragnor.

I wonder why I only get peak time lag after being cabneitsed then. *sigh*




Information wants to be free. The Net interprets censorship as damage and routes around it.


4232 posts

Uber Geek

Trusted

  # 451888 25-Mar-2011 20:58
Send private message

Lias: I have similar issues on TCL, I'm cabnetised, have previously tried connecting the router directly to the PC and bypassing my home network, using monitoring tools to ensure there is no traffic other than the ICMP on my line, etc etc. Normally only happens during peak hour, and sadly is pretty much guranteed to be cabinet congestion.

Not even TCL's fault, its simply Chorus/Telecom only suppling a pathetic amount of of bandwidth per wholesale connection, instead of something reasonable.



[edited] Correct info already supplied.

Cheers - N




--

 

Please note all comments are the product of my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.




6801 posts

Uber Geek

Trusted
Lifetime subscriber

  # 454502 2-Apr-2011 12:27
Send private message

Well, I'm somewhat embarrassed now... the problem that I've been having recently is NOT a recurrence of the problem that I was having on-and-off last year. The symptoms were the same so I assumed that it was the same issue, but this time it ended up being a faulty Wi-Fi card at my end.

I should point out that this is not the same card that I was having issues with last year (and I tried using Ethernet when I was testing that). So there was an "actual" problem last year (which seems to have been fixed) and the problem that I've been having for the past couple of weeks was actually unrelated.



6801 posts

Uber Geek

Trusted
Lifetime subscriber

  # 454523 2-Apr-2011 14:13
Send private message

... Or not. I think it was a combination of two issues because after switching to Ethernet it was fine for a few hours, but now it's back up into the hundreds of ms again. The saga continues...

 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Switch your broadband provider now - compare prices


Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Intel introduces cryogenic control chip to enable quantum computers
Posted 10-Dec-2019 21:32


Vodafone 5G service live in four cities
Posted 10-Dec-2019 08:30


Samsung Galaxy Fold now available in New Zealand
Posted 6-Dec-2019 00:01


NZ company oDocs awarded US$ 100,000 Dubai World Expo grant
Posted 5-Dec-2019 16:00


New Zealand Rugby Selects AWS-Powered Analytics for Deeper Game Insights
Posted 5-Dec-2019 11:33


IMAGR and Farro bring checkout-less supermarket shopping to New Zealand
Posted 5-Dec-2019 09:07


Wellington Airport becomes first 5G connected airport in the country
Posted 3-Dec-2019 08:42


MetService secures Al Jazeera as a new weather client
Posted 28-Nov-2019 09:40


NZ a top 10 connected nation with stage one of ultra-fast broadband roll-out completed
Posted 24-Nov-2019 14:15


Microsoft Translator understands te reo Māori
Posted 22-Nov-2019 08:46


Chorus to launch Hyperfibre service
Posted 18-Nov-2019 15:00


Microsoft launches first Experience Center worldwide for Asia Pacific in Singapore
Posted 13-Nov-2019 13:08


Disney+ comes to LG Smart TVs
Posted 13-Nov-2019 12:55


Spark launches new wireless broadband "Unplan Metro"
Posted 11-Nov-2019 08:19


Malwarebytes overhauls flagship product with new UI, faster engine and lighter footprint
Posted 6-Nov-2019 11:48



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.