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Latency through ipv6 tunnel

jd678
Dabbler
Posts: 22
Registered: 09-08-2008

Latency through ipv6 tunnel

As there's no native ipv6 with plusnet, I'm running an aviya tunnel through to SIXXS.
Noticing it got a bit slow each evening, I thought I'd graph it for a while:

There's not too many enabled right now, but if I hit an ipv6 site in the evening, the navigation is a little frustrating.
I'm assuming this is network management kicking in... any chance of bumping the priority of aviya tunnels up a bit?
6 REPLIES
Community Veteran
Posts: 1,850
Registered: 04-04-2007

Re: Latency through ipv6 tunnel

Can you do a trace through the tunnel and one in the clear please when you see these slow downs?
Is that possible for you to do?
jd678
Dabbler
Posts: 22
Registered: 09-08-2008

Re: Latency through ipv6 tunnel

Can do - won't be in tonight when it slows down, so I've just started recording a few things every 5 minutes:
traceroute6 www.sixxs.net
traceroute www.sixxs.net
traceroute6 2a01:348:6:12b::1 (tunnel endpoint - what's being graphed above)
traceroute gblon02.sixxs.net (ipv4 endpoint of the tunnel)
Let me know if you need anything else and I'll add it in.
jd678
Dabbler
Posts: 22
Registered: 09-08-2008

Re: Latency through ipv6 tunnel

OK, got some from lastnight, the following were all at 00:05:
traceroute to www.m.sixxs.net (2001:838:1:1:210:dcff:fe20:7c7c) from 2a01:348:6:12b::2, 30 hops max, 16 byte packets
1  * gw-300.lon-02.gb.sixxs.net (2a01:348:6:12b::1)  2521.74 ms  2927.01 ms
2  ae0-1235.rt2.the.uk.goscomb.net (2a01:348:0:4:0:3:0:1)  3007.38 ms  3306.99 ms  4201.29 ms
3  ge-0-0-0-1368.rt1.nik.nl.goscomb.net (2a01:348::10:1:1)  4435.88 ms  4506.71 ms  4551.8 ms
4  * ams-ix2.ipv6.concepts.nl (2001:7f8:1::a501:2871:2)  2540.8 ms  2061.62 ms
5  2001:838:0:13::1 (2001:838:0:13::1)  1778.17 ms  2088.61 ms  2558.86 ms
6  2001:838:0:12::2 (2001:838:0:12::2)  2203.32 ms  2310.85 ms  2701.73 ms
7  noc.sixxs.net (2001:838:1:1:210:dcff:fe20:7c7c)  2997.8 ms  2982.38 ms  2639.79 ms
traceroute: Warning: www.sixxs.net has multiple addresses; using 193.109.122.244
traceroute to www.m.sixxs.net (193.109.122.244), 30 hops max, 40 byte packets
1  10.2.10.2 (10.2.10.2)  1.078 ms  1.049 ms  0.963 ms
2  lo0.plusnet.thn-ag1.plus.net (195.166.128.101)  33.221 ms  34.909 ms  35.163 ms
3  vl703.thn-gw1.plus.net (84.92.4.241)  33.357 ms  39.160 ms  35.335 ms
4  195.66.226.185 (195.66.226.185)  36.683 ms  35.401 ms  35.371 ms
5  te8-7.ccr01.ams03.atlas.cogentco.com (130.117.0.197)  43.778 ms  43.600 ms  41.189 ms
6  vl3490.mpd01.ams03.atlas.cogentco.com (130.117.3.106)  46.975 ms  42.207 ms  48.659 ms
7  cogent-1101.xe-0-0-0.jun1.kelvin.network.bit.nl (149.6.128.154)  42.322 ms  48.057 ms  44.011 ms
8  nlede01.sixxs.net (193.109.122.244)  45.969 ms  52.570 ms  43.139 ms
traceroute to 2a01:348:6:12b::1 (2a01:348:6:12b::1) from 2a01:348:6:12b::2, 30 hops max, 16 byte packets
1  gw-300.lon-02.gb.sixxs.net (2a01:348:6:12b::1)  2169.6 ms  2227.38 ms  2316.1 ms
traceroute to gblon02.sixxs.net (77.75.104.126), 30 hops max, 40 byte packets
1  10.2.10.2 (10.2.10.2)  1.036 ms  0.973 ms  0.950 ms
2  lo0.plusnet.thn-ag1.plus.net (195.166.128.101)  34.105 ms  38.506 ms  35.297 ms
3  vl703.thn-gw1.plus.net (84.92.4.241)  36.803 ms  36.026 ms  39.832 ms
4  ae0-461.rt0.sov.uk.goscomb.net (195.66.226.226)  34.780 ms  35.768 ms  37.849 ms
5  ae0-1624.rt2.the.uk.goscomb.net (77.75.109.161)  37.601 ms  35.388 ms  35.664 ms
6  gblon02.sixxs.net (77.75.104.126)  35.239 ms  36.579 ms  34.321 ms
Community Veteran
Posts: 1,850
Registered: 04-04-2007

Re: Latency through ipv6 tunnel

Hi James.
Yip prettly high response times evident there through the tunnel.
Can I ask what port (s) you are using for the Avaya client?
If it is not a standard VPN port is it possible for you to change this?
I've looked at the Avaya support info and trying to get a handle on which port (s) it uses is not proving to be easy.
I want to ensure that our traffic management is correctly identifying the ports in use as VPN, providing they are in the standard VPN range that is Smiley
Alernatively, a Wireshark capture of the traffic might help identify its classification.
jd678
Dabbler
Posts: 22
Registered: 09-08-2008

Re: Latency through ipv6 tunnel

Oops, it's ayiya, not aviya... and nothing atall to do with avaya. lol
All open, so plenty of documentation:
http://www.sixxs.net/tools/ayiya/
I could get you a capture, but I should imagine the draft will be easier to interpret...
Community Veteran
Posts: 1,850
Registered: 04-04-2007

Re: Latency through ipv6 tunnel

Doh. I need to learn to read properly.
Thats much more to go on. I'll get someone to take a look at this tomorrow.