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Loss of IPv6

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Loss of IPv6

According to my IPv6 TBB graph at about 10:00 this morning, Wednesday 12 October 2016, I lost IPv6 connectivity, the IPv4 graph is OK and my PPP session has not dropped. I am on gateway ptn-ag03.

Has anybody else on the trial noticed this?

16 REPLIES 16
Highlighted
Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

Seems to be a loss of routing.

 

>tracert -6 www.google.com

Tracing route to www.google.com [2a00:1450:4009:814::2004]
over a maximum of 30 hops:

  1     3 ms    <1 ms    <1 ms  2a02:16c8:2000:b00:6203:47ff:fe00:1baa
  2     9 ms     9 ms     8 ms  2a02:16c8:0:1::1b
  3     9 ms     8 ms     9 ms  2a02:16c8:1:2::11
  4     9 ms     8 ms     8 ms  2a02:16c8::a
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
tracert -4 www.google.com

Tracing route to www.google.com [216.58.204.68]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.0.101
  2     9 ms     8 ms     9 ms  lo0-central10.ptn-ag03.plus.net [195.166.128.192]
  3     9 ms     8 ms     9 ms  link-a-central10.ptn-gw01.plus.net [212.159.2.136]
  4     8 ms     8 ms     8 ms  xe-5-3-0.ptw-cr01.plus.net [212.159.0.108]
  5     8 ms     9 ms     9 ms  72.14.222.97
  6     8 ms    10 ms     9 ms  72.14.232.193
  7     8 ms     9 ms     8 ms  108.170.238.123
  8     9 ms     8 ms    11 ms  lhr25s13-in-f4.1e100.net [216.58.204.68]

 

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

I also lost IPv4 connectivity at 17:15, router is still connected and has a ppp session.

(Edit: Time changed from 16:45 to 17:15)

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Community Gaffer
Community Gaffer
Posts: 14,484
Thanks: 2,094
Fixes: 147
Registered: ‎04-04-2007

Re: Loss of IPv6

I can't see how it would be related but I know we relocated some of the BNG endpoints to a different data centre this morning.

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

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Pro
Posts: 1,197
Thanks: 102
Fixes: 4
Registered: ‎26-08-2010

Re: Loss of IPv6

IPv6 connectivity should still be functioning then Bob? I lost mine several weeks back after several years of uninterrupted operation and just assumed it had been abruptly abandoned (like the first trial!).
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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

I may be suffering from router problems.

The log has the following messages at the time I lost IPv4

Oct 12 17:14:46 192.168.0.101 kernel: À*#015ÔÀ*#015Ô#036}Ù÷
Oct 12 17:14:46 192.168.0.101 kernel: #036<82>Z#011#036<83>#032#014#036<85>#032#024
Oct 12 17:14:46 192.168.0.101 kernel: #036<87>Ú#037
Oct 12 17:14:46 192.168.0.101 kernel: #036<89>Ú'#036<8a><9a>*#036<8b>Z-

 

Following a power cycle on the router I am now connected to pcl-bng01 and have IPv4 back. Will look at gateway hopping tomorrow and see if I can land on a non BNG gateway.

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

Managed to land on pcl-ag03 at the first attempt.

IPv4 OK

IPv6 no connectivity

tracert -6 www.google.com

Tracing route to www.google.com [2a00:1450:4009:803::2004]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  2a02:16c8:2000:b00:6203:47ff:fe00:1baa
  2    11 ms    19 ms    10 ms  2a02:16c8:0:1::13
  3    23 ms     9 ms    16 ms  2a02:16c8:1:2::17
  4    19 ms    11 ms     9 ms  2a02:16c8::c
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
Highlighted
Community Gaffer
Community Gaffer
Posts: 14,484
Thanks: 2,094
Fixes: 147
Registered: ‎04-04-2007

Re: Loss of IPv6

Will do some digging, but needless to say it's going to be pretty low priority Sad

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

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Rising Star
Posts: 189
Thanks: 40
Registered: ‎30-07-2007

Re: Loss of IPv6

That does seem to sum up PlusNet & IPv6 - it's low priority.

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

Without any action on my part or loss of ppp session, it is now working again.

TBB graph showed it happened at about 23:15 last night (13 Oct 2016).

Still on gateway pcl-ag03

tracert -6 www.google.com

Tracing route to www.google.com [2a00:1450:4009:801::2004]
over a maximum of 30 hops:

1 1 ms 1 ms 1 ms 2a02:16c8:2000:b00:..........
2 10 ms 10 ms 9 ms 2a02:16c8:0:1::13
3 10 ms 10 ms 9 ms 2a02:16c8:1:2::17
4 10 ms 10 ms 10 ms 2a02:16c8::c
5 14 ms 10 ms 10 ms 2a00:2380:300c:1001::2
6 10 ms 10 ms 10 ms 2a00:2380:10c::1c
7 12 ms 11 ms 10 ms 2a00:2380:c::40
8 10 ms 10 ms 10 ms 2a00:2380:5::1e3
9 10 ms 10 ms 10 ms 2a00:2380:2001:1000::3
10 11 ms 11 ms 11 ms 2001:4860:0:1::1827
11 12 ms 11 ms 12 ms 2001:4860:0:1::259
12 11 ms 11 ms 10 ms lhr35s01-in-x04.1e100.net [2a00:1450:4009:801::2004]

Trace complete.

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Grafter
Posts: 115
Thanks: 3
Registered: ‎09-09-2011

Re: Loss of IPv6

Also started working again for me overnight, on ag06:

6b709d094c8ed71c554e697a4b6fd4f1-14-10-2016

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

Loss of IPv6 (again) at 02:20 19 October 2016.

Exactly the same as before, IPv4 OK, ppp session did not drop, still on gateway pcl-ag03.

 

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Grafter
Posts: 115
Thanks: 3
Registered: ‎09-09-2011

Re: Loss of IPv6

Ditto, exactly the same time. My PPP connection bounced overnight and IPv6 came back, this time I'm on ag01:

 

e49151d751df0e8fe152eac5237ecd1a-23-10-2016

 

I figure it's good to see some disruption after months of no activity. This is a trial, and the loss and recovery of IPv6 shows that someone is at least doing something with the configuration. 

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

My IPv6 came back at approx. 23:15 last night (22 Oct 2016), I lost it again at 07:45 the next morning when my PPP session dropped and I reconnected onto a BNG gateway.

 

I would hope that configuration changes are being made with a proper change control process.

 

Needed five attempts to land on a non-BNG gateway: pcl-ag08 and get IPv6 back.

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Grafter
Posts: 312
Thanks: 6
Registered: ‎03-07-2009

Re: Loss of IPv6

Lost IPv6 again at 17:30 this evening, no loss of PPP session.