Off-peak packet loss

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andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Off-peak packet loss

Post by andrewvs » Sun Dec 23, 2007 5:19 pm

Just reposting this under a new thread to make it easier to keep track of, as the old thread I hijacked was actually about an unrelated problem >.>
andrewvs wrote:There is currently what appears to be a contention problem on the Melbourne POP after midnight if that is when you're having problems.
I've been getting packet loss for a good 2-3 hours from midnight onwards since the 14th, you can see this mornings loss/latency graph here, or the link in my sig: http://58.96.65.170/cgi-bin/smokeping.c ... enerate%21

This affects everything from gaming and VoIP, to download speeds and even streaming radio (which buffers then just stops due to the amount of packet loss).

I've been told something has been changed/fixed with the network every day for the last 3 days in the IRC channel, but unfortunately that hasn't changed anything.

Exetel, the last 2-3 times this exact problem has occurred (bad packet loss, high latencies, slow transfer speeds), it was determined the link needed to be upgraded (see email below)... has anyone actually checked if this is the case again?

This is not only affecting me, but most Victorian customers. Pinging a couple of different netblocks on the pop from an external box after midnight shows around a third of IP's have packet loss greater than 5%. (I've got logs of these tests run on the 15th that I can forward to someone if needed)
I'm sure if you guys set up a cron job to fping some melb pop ip's on one of your office boxes at around 12:30 or 1am, you would find the same.
Email from Exetel Customer Support - 30/08/2007
The current slow speeds and packet loss being experienced by Victorian users connected to Exetel via the Exetel Victorian PoP are being caused by lack of capacity on the TWE circuit connecting approximately 3,000 users to Exetel.

This problem has been too slow to be correctly diagnosed for which I apologise but the upgrade order for this circuit was placed yesterday which will resolve the issue.
Last edited by andrewvs on Sun Dec 23, 2007 5:36 pm, edited 1 time in total.

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Sun Dec 23, 2007 5:24 pm

Not sure if this helps the Exetel network guys trying to troubleshoot this, but I experienced loss from about 9am this morning till mid day, as well as earlier from midnight-5am... can this graph somehow be compared with other load/utilization graphs to work out where the contention is?
Image

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Thu Dec 27, 2007 2:23 pm

Still having ongoing problems...
Image
(The spike at 3am is unrelated, caused by downloading)

David_h
Exetel Staff
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Joined: Fri Apr 13, 2007 9:20 am

Post by David_h » Thu Dec 27, 2007 3:17 pm

Can you do some traceroutes at that time to find out where the packets are dropping?
-David

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Thu Dec 27, 2007 3:26 pm

Will do, any particular addresses you want me to traceroute apart from exetel.com.au?

David_h
Exetel Staff
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Joined: Fri Apr 13, 2007 9:20 am

Post by David_h » Thu Dec 27, 2007 3:26 pm

that should be fine.
-David

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Fri Dec 28, 2007 3:02 am

Please see traceroutes here from 12:20am-2:45am, forgot to set up the cron job earlier unfortunately.

Let me know if you need anything else.

David_h
Exetel Staff
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Post by David_h » Fri Dec 28, 2007 8:28 am

Do you have any trouble accessing the exetel website at that time?
-David

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Fri Dec 28, 2007 9:23 am

It's a fair bit slower than normal, but I haven't noticed any timeouts or anything like that.

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Fri Dec 28, 2007 2:56 pm

This morning's graph:
Image

Danofar
Posts: 5
Joined: Sun Aug 26, 2007 2:11 am
Location: Melbourne, Vic

Post by Danofar » Sat Dec 29, 2007 12:53 am

Yea, i have been getting the same problem, again ping times on online games are rubbish, esp after midnight now.
Reminds me of a problem that was around a while back..
Can anyone provide solutions to this? what should i do? upgrade my connection again? i just want to play my games, not asking for much..

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Sat Dec 29, 2007 2:00 am

Danofar wrote:Can anyone provide solutions to this? what should i do? upgrade my connection again? i just want to play my games, not asking for much..
Upgrading your connection wont help at all, as this is a fault in Exetel's network, your only real options are to put up with it and hope it gets fixed soon, or churn to another isp :?

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Wed Jan 02, 2008 3:12 pm

Image
:cry:

David_h
Exetel Staff
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Joined: Fri Apr 13, 2007 9:20 am

Post by David_h » Wed Jan 02, 2008 3:21 pm

Andrew

You have been placed in a special pool for monitoring, please continue to test this.
-David

andrewvs
Posts: 54
Joined: Sun Jun 04, 2006 10:34 pm
Location: 1.5Mbit, Melb POP, Geelong, Vic

Post by andrewvs » Wed Jan 02, 2008 5:38 pm

Cheers David, will let you know if anything improves.

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