Very poor and erratic ping times
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Re: Very poor and erratic ping times
30-09-2014 5:20 PM
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I think the only option we have moving forward is to press on with the faults team and refer this back to BT again for further diagnostics. Intermittent latency issues such as this can be notoriously difficult to diagnose once the usual hiding places have been checked.
Given how far along the faults process is now I would expect that there would be few places left for the supplier to investigate and we should hopefully see the cause of the issue identified.
Re: Very poor and erratic ping times
01-10-2014 2:53 PM
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On the TBB ping graphs page (http://community.plus.net/ping-graphs/) there is one other graph that looks similar to mine. Is there anyway for you to contact that user or find out more about their symptoms?
Re: Very poor and erratic ping times
01-10-2014 6:01 PM
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There is also the chance of course someone is maxing out the connection as well.
Re: Very poor and erratic ping times
01-10-2014 8:53 PM
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Given that latency is a measure of round trip transmission, packet loss due to errors would inflate latency figures.
Something maxing out uploads (file sharing etc) might indeed cause these results, as typically pings which are used to measure latency are considered low priority and can be dropped on a busy link.
Martyn,
I had thought of doing some more fiddling with router stats but thought you had enough on your hands... however, given where we are...
If you scan through the RouterStats settings, there is a tick box for "show ping tab" - can you please find it and enable it, then save the settings. Then on the Ping tab can you put plus.net in there.
We then need to examine that along side the TBB graph and see if there is latency both ways round.
Kevin
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Re: Very poor and erratic ping times
01-10-2014 11:47 PM
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I think the ping tests and trace routes I've run suggest that the problem is there both ways around and I'm running the ping tests from Router Stats right now and they are all over the place. The majority are 20 to 30ms, but there are spikes over 200 and 300ms which seems consistent with the tracert testing that I do (there are a few lost packets but not that many really).
There is nothing running file sharing on my LAN. I don't have any torrent clients installed on any of the local machines.
Martyn.
Re: Very poor and erratic ping times
01-10-2014 11:54 PM
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As much as possible has been done to profile this issue now. Please keep RS running, keep an eye on SNRM variations to see if there is any evidence of REIN.
It is now as Adam suggests back to BTw / BTOR to investigate their back end systems.
Sorry I can do no more to help here.
Kevin
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Re: Very poor and erratic ping times
02-10-2014 8:15 AM
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Re: Very poor and erratic ping times
02-10-2014 8:36 AM
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Can you please provide a snapshot link to the current (not live) TBB graph please?
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Re: Very poor and erratic ping times
02-10-2014 8:45 AM
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The wifi was disabled at midnight and re-enabled at 7am.
Re: Very poor and erratic ping times
02-10-2014 9:08 AM
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In another browser tab, login into the Plusnet user portal BEFORE clicking the fault & ticket links
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
If this post helped, please click the Thumbs Up and if it fixed your issue, please click the This fixed my problem green button below.
Re: Very poor and erratic ping times
02-10-2014 2:43 PM
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Quote from: Townman Chroluk,
Given that latency is a measure of round trip transmission, packet loss due to errors would inflate latency figures.
Something maxing out uploads (file sharing etc) might indeed cause these results, as typically pings which are used to measure latency are considered low priority and can be dropped on a busy link.
Martyn,
I had thought of doing some more fiddling with router stats but thought you had enough on your hands... however, given where we are...
If you scan through the RouterStats settings, there is a tick box for "show ping tab" - can you please find it and enable it, then save the settings. Then on the Ping tab can you put plus.net in there.
We then need to examine that along side the TBB graph and see if there is latency both ways round.
Kevin
Maybe, but his error rates are nowhere near high enough.
Re: Very poor and erratic ping times
02-10-2014 11:38 PM
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I can't imagine this being caused by anything on our side of the network but it has to be something quite obscure, perhaps the port you even line card you're connected to?
Re: Very poor and erratic ping times
03-10-2014 7:58 AM
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A techie on another forum has asked if PN have an option to put my broadband on a different pipe/virtual path back to the exchange. Is that an option? This is a recent tracert:
03/10/2014 - 7:57:19.97
Tracing route to uwsp-webdev1.warwicknet.com [94.125.132.15] over a maximum of 30 hops:
1 1 ms <1 ms 1 ms home.gateway.home.gateway [192.168.1.254]
2 324 ms 102 ms 20 ms lo0.10.central10.pcl-bng02.plus.net [195.166.130.151]
3 450 ms 204 ms 204 ms irb.10.pcl-cr01.plus.net [84.93.249.81]
4 25 ms 17 ms 25 ms ae1.ptw-cr01.plus.net [195.166.129.0]
5 267 ms 25 ms 25 ms gi3-5.the-scr1.warwick.net.uk [195.66.224.113]
6 148 ms 26 ms 28 ms gi2-1-252.uwsp-scr1.warwick.net.uk [94.125.133.209]
7 34 ms 117 ms 252 ms uwsp-webdev1.warwicknet.com [94.125.132.15]
Re: Very poor and erratic ping times
03-10-2014 10:09 AM
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It makes sense to me that we look at this as a possibility. Feel free to add this to your ticket.
Re: Very poor and erratic ping times
03-10-2014 10:18 AM
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A VP switch would only be of use if the exchange was showing congestion on your VP. Based on information examined by Adam, there is no congestion at your exchange or a "parent" exchange.
If the line has a high level of errors a SNRM up shift might help - I've not seen evidence of high errors.
Chris,
Lift n shift sounds like a possible way forward, though that would imply errors on the line card.
Kevin
In another browser tab, login into the Plusnet user portal BEFORE clicking the fault & ticket links
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
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