DNS weirdness
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Re: DNS weirdness
09-07-2009 2:12 PM
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Edit: asked the guys who've been looking after the investigation and the consensus is that the failed health checks were the result of something else. Having said that we don't think it's massively service affecting when it does happen as it's always the TCP listener that fails and not UDP (which is what the vast majority of DNS requests are sent using anyway).
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: DNS weirdness
09-07-2009 6:39 PM
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I've been on and off this afternoon, believe it may have happened again twice. Can't be sure, guess we'll see how the evening pans out.
**EDIT** Just run my traces again, these may interest you, alot better than yesterday and so far this evening i've had no problems XD:
Quote Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Adam Streather>tracert 212.159.13.49
Tracing route to pth-cdns01.plus.net [212.159.13.49]
over a maximum of 30 hops:
1 1 ms 1 ms 1 ms 192.168.0.1
2 42 ms 39 ms 40 ms lo0-plusnet.pcl-ag01.plus.net [195.166.128.27]
3 179 ms 201 ms 197 ms gi1-2-803.pcl-gw1.plus.net [84.92.5.57]
4 37 ms 43 ms 47 ms vl63.pcl-lb01.plus.net [212.159.2.252]
5 40 ms 41 ms 49 ms pth-cdns01.plus.net [212.159.13.49]
Trace complete.
C:\Users\Adam Streather>tracert 212.159.13.50
Tracing route to pth-cdns02.plus.net [212.159.13.50]
over a maximum of 30 hops:
1 1 ms 2 ms 2 ms 192.168.0.1
2 35 ms 36 ms 36 ms lo0-plusnet.pcl-ag01.plus.net [195.166.128.27]
3 37 ms 48 ms 38 ms gi1-2-803.pcl-gw1.plus.net [84.92.5.57]
4 38 ms 38 ms 41 ms vl63.pcl-lb01.plus.net [212.159.2.252]
5 57 ms 45 ms 39 ms pth-cdns02.plus.net [212.159.13.50]
Trace complete.
C:\Users\Adam Streather>tracert 212.159.6.9
Tracing route to ptn-cdns01.plus.net [212.159.6.9]
over a maximum of 30 hops:
1 1 ms 1 ms 2 ms 192.168.0.1
2 40 ms 40 ms 43 ms lo0-plusnet.pcl-ag01.plus.net [195.166.128.27]
3 39 ms 41 ms 44 ms gi1-2-803.pcl-gw1.plus.net [84.92.5.57]
4 49 ms 55 ms 64 ms vl63.pcl-lb01.plus.net [212.159.2.252]
5 40 ms 42 ms 39 ms ptn-cdns01.plus.net [212.159.6.9]
Trace complete.
C:\Users\Adam Streather>tracert 212.159.6.10
Tracing route to ptn-cdns02.plus.net [212.159.6.10]
over a maximum of 30 hops:
1 1 ms 1 ms <1 ms 192.168.0.1
2 382 ms 66 ms 36 ms lo0-plusnet.pcl-ag01.plus.net [195.166.128.27]
3 47 ms 57 ms 70 ms gi1-2-803.pcl-gw1.plus.net [84.92.5.57]
4 45 ms 34 ms 36 ms vl63.pcl-lb01.plus.net [212.159.2.252]
5 32 ms 36 ms 33 ms ptn-cdns02.plus.net [212.159.6.10]
Trace complete.
Re: DNS weirdness
09-07-2009 8:29 PM
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Quote from: djadamuk Still no update on the service status which was due at 13:00 today.
Will update it now, judging by the lack of noise this evening it looks like we might have fixed the main cause of the problems.
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: DNS weirdness
09-07-2009 8:31 PM
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Quote from: Bob
Quote from: djadamuk Still no update on the service status which was due at 13:00 today.
Will update it now, judging by the lack of noise this evening it looks like we might have fixed the main cause of the problems.
Yeah as I say, i've had no problems. But I'll try not to speak too soon. Thanks Bob and the team!
Re: DNS weirdness
09-07-2009 9:08 PM
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Quote from: Bob Will update it now, judging by the lack of noise this evening it looks like we might have fixed the main cause of the problems.
Thanks Bob. No problems tonight.
FYI Here is a copy of my DNS traceroute.
C:\Documents and Settings\Mike>tracert 212.159.6.9
Tracing route to ptn-cdns01.plus.net [212.159.6.9]
over a maximum of 30 hops:
1 1 ms 1 ms <1 ms 192.168.0.1
2 46 ms 39 ms 41 ms lo0-plusnet.pcl-ag01.plus.net [195.166.128.27]
3 39 ms 38 ms 39 ms gi1-2-803.pcl-gw1.plus.net [84.92.5.57]
4 40 ms 38 ms 38 ms vl63.pcl-lb01.plus.net [212.159.2.252]
5 41 ms 40 ms 45 ms ptn-cdns01.plus.net [212.159.6.9]
Trace complete.
Re: DNS weirdness
09-07-2009 10:48 PM
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So far, none of this has had any effect. Following this evening's post that the problem may be cleared up i've tried the websites i've been having problems with but i still can't access them.
So - please don't give up trying to sort this out just yet!
Re: DNS weirdness
09-07-2009 11:13 PM
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Start, Run and enter "Cmd" and click OK
In the command box enter
ipconfig /flushdns
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: DNS weirdness
10-07-2009 8:13 AM
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Re: DNS weirdness
10-07-2009 8:40 AM
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Re: DNS weirdness
10-07-2009 8:58 AM
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3 tries to collect my mail, several tries to get the Beeb. Tracert:
Tracing route to portal.plus.net [212.159.8.2]
over a maximum of 30 hops:
1 1 ms 1 ms 1 ms 192.168.0.1
2 23 ms 24 ms 24 ms lo0-plusnet.thn-ag3.plus.net [195.166.128.80]
3 * 2107 ms 24 ms vl303.thn-gw1.plus.net [84.92.3.177]
4 23 ms 23 ms 23 ms ae0-102.ptn-gw01.plus.net [212.159.1.53]
5 24 ms 25 ms 25 ms gi0-1-31.ptc-gw1.plus.net [195.166.129.3]
6 30 ms 32 ms 32 ms pos1-0.pih-cr1.plus.net [195.166.129.250]
7 52 ms * 32 ms vlan7.pih-gw3.plus.net [212.159.0.26]
8 92 ms 40 ms 34 ms if25.pih-lb04.plus.net [212.159.0.18]
9 33 ms 31 ms 31 ms portal.plus.net [212.159.8.2]
Trace complete.
Any ideas? Outlook just failed to connect to your servers again for e-mail!
Just re-booted the router, seems to be OK now
Tracing route to portal.plus.net [212.159.9.2]
over a maximum of 30 hops:
1 10 ms 8 ms 2 ms 192.168.0.1
2 24 ms 26 ms 24 ms lo0-plusnet.pcl-ag03.plus.net [195.166.128.109]
3 24 ms 25 ms 23 ms gi1-6-703.pcl-gw01.plus.net [84.92.0.181]
4 24 ms 23 ms 23 ms te2-2.pte-gw1.plus.net [212.159.0.186]
5 24 ms 27 ms 24 ms te2-4.pte-gw2.plus.net [212.159.1.102]
6 29 ms 31 ms 30 ms 92.core.plus.net [212.159.1.92]
7 122 ms 29 ms 31 ms fhw-lb04.plus.net [212.159.1.146]
8 532 ms 46 ms 29 ms portal.plus.net [212.159.9.2]
Trace complete.
Re: DNS weirdness
10-07-2009 9:19 AM
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Tracing route to www.bristol.ac.uk [137.222.10.246]
over a maximum of 30 hops:
1 2 ms 2 ms 2 ms 192.168.2.1
2 14 ms 4 ms 3 ms voyager.home [192.168.1.1]
3 27 ms 28 ms 28 ms lo0-plusnet.ptn-ag2.plus.net [195.166.128.53]
4 27 ms 26 ms 26 ms gi2-2-204.ptn-gw02.plus.net [84.92.3.93]
5 30 ms 26 ms 31 ms linx-gw2.ja.net [195.66.226.15]
6 25 ms 26 ms 26 ms so-3-2-0.lond-sbr3.ja.net [146.97.35.241]
7 29 ms 24 ms 26 ms so-6-0-0.read-sbr1.ja.net [146.97.33.165]
8 35 ms 28 ms 27 ms so-1-2-0.bris-sbr1.ja.net [146.97.33.105]
9 42 ms 29 ms 45 ms SWERN-B1.site.ja.net [146.97.41.226]
10 29 ms 27 ms 27 ms 4948-c-clif-ph.swern.net.uk [194.83.94.213]
11 35 ms 28 ms 48 ms ub-gw-2-4948-c.swern.net.uk [194.82.125.158]
12 * * * Request timed out.
13 29 ms 28 ms 28 ms www.bristol.ac.uk [137.222.10.246]
Trace complete.
Re: DNS weirdness
10-07-2009 9:24 AM
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So I reset my PPP connection an hour ago.
I was using Juniper 1 gateway for past couple of days with no real issues until this morning.
DNS seemed to be going thru the PTN load balancer
Now on Juniper 10
All seems okay now.
DNS seems to be going thru the PCL load balancer. (I understsand it is now fixed as of yesterday)
fwiw, my web browser has no trouble loading www.bristol.ac.uk [137.222.10.246] homepage.
Re: DNS weirdness
10-07-2009 9:37 AM
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Quote from: spacecowboy Not sure whether this is helpful or not but here's the results of tracert for one of the sites i can't access
That's no different to a trace from my machine and I *can* access the site:
C:\Users\Bobby>tracert www.bristol.ac.uk
Tracing route to www.bristol.ac.uk [137.222.10.246]
over a maximum of 30 hops:
1 2 ms 1 ms 3 ms home.gateway [192.168.1.254]
2 28 ms 29 ms 31 ms lo0.plusnet.thn-ag2.plus.net [195.166.128.93]
3 27 ms 28 ms 29 ms vl604.thn-gw1.plus.net [84.92.4.169]
4 27 ms 29 ms 28 ms ae0-102.ptn-gw01.plus.net [212.159.1.53]
5 27 ms 28 ms 28 ms vl32.ptn-gw02.plus.net [195.166.129.12]
6 27 ms 28 ms 28 ms linx-gw2.ja.net [195.66.226.15]
7 26 ms 29 ms 30 ms so-0-1-0.lond-sbr3.ja.net [146.97.35.249]
8 31 ms 31 ms 29 ms so-6-0-0.read-sbr1.ja.net [146.97.33.165]
9 34 ms 30 ms 31 ms so-1-2-0.bris-sbr1.ja.net [146.97.33.105]
10 30 ms 34 ms 29 ms SWERN-B1.site.ja.net [146.97.41.226]
11 31 ms 35 ms 31 ms 4948-c-clif-ph.swern.net.uk [194.83.94.213]
12 30 ms 31 ms 33 ms ub-gw-2-4948-c.swern.net.uk [194.82.125.226]
13 * * * Request timed out.
14 34 ms 30 ms 31 ms www.bristol.ac.uk [137.222.10.246]
Trace complete.
Is the problem intermittent is this site always inaccessible? If it's always inaccessible then I doubt it's anything to do with the intermittent DNS issues we were seeing. You might want to look at tweaking your MTU/RWIN settings as that can sometimes prevent you accessing some sites.
Quote from: moemoff My friend who is on a business account is also experiencing network time-outs . He can't even visit our own websites. He is seriously considering moving to another provider now because the service is laughable and for the money paid he is getting a bad service.
Again, is the problem consistent or intermittent?
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: DNS weirdness
10-07-2009 10:51 AM
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Quote from: Bob
That's no different to a trace from my machine and I *can* access the site:
..
Is the problem intermittent is this site always inaccessible? If it's always inaccessible then I doubt it's anything to do with the intermittent DNS issues we were seeing. You might want to look at tweaking your MTU/RWIN settings as that can sometimes prevent you accessing some sites.
It's intermittent in the sense that i can sometimes (maybe 1 out of 5 tries) get a version of the homepage to load but it's unformatted and has no graphics at all.
This problem started about a week or so ago - up till then we'd had no problems
Re: DNS weirdness
10-07-2009 10:57 AM
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www.meldexinternational.com
www.picturecraftgallery.com
www.westcliffegallery.com
Is it safe for a non-techie like me to play with MTU/RWIN settings? If so, would you suggest any particular settings to try?
Thanks for help in trying to resolve what's becoming a rather annoying issue.
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