Subj : Free tunnels, for how long?
To   : Bj”rn Felten
From : Michiel van der Vlist
Date : Wed Nov 02 2011 18:10:58

Hello Bj”rn,

On Wednesday November 02 2011 17:34, you wrote to me:

 MvdV>> And for my HE tunnel (teminating at AMSIX)

 MvdV>> root@OpenWrt:~# ping 216.66.84.46

 BF>    The same PoP?

Argh! copy and paste error. 216.66.84.46 is my HE tunnel

This is the SixXs tunnel:

root@OpenWrt:~# ping 193.109.122.244
PING 193.109.122.244 (193.109.122.244): 56 data bytes
64 bytes from 193.109.122.244: seq=0 ttl=60 time=11.249 ms
64 bytes from 193.109.122.244: seq=1 ttl=60 time=12.505 ms
64 bytes from 193.109.122.244: seq=2 ttl=60 time=11.905 ms
64 bytes from 193.109.122.244: seq=3 ttl=60 time=27.348 ms
64 bytes from 193.109.122.244: seq=4 ttl=60 time=11.964 ms
64 bytes from 193.109.122.244: seq=5 ttl=60 time=12.358 ms
64 bytes from 193.109.122.244: seq=6 ttl=60 time=11.180 ms
^C
-+- 193.109.122.244 ping statistics ---
7 packets transmitted, 7 packets received, 0% packet loss
round-trip min/avg/max = 11.180/14.072/27.348 ms

Slightly longer rthan HE and much more variance.

 MvdV>> round-trip min/avg/max = 8.154/10.548/11.872 ms

 BF>    No mdev? It seems to be several milliseconds...

Sorry OpenWrt's ping does not do that. Have to do it yourself.

 MvdV>> -+- 82.96.56.14 ping statistics ---
 MvdV>> 7 packets transmitted, 7 packets received, 0% packet loss
 MvdV>> round-trip min/avg/max = 28.243/29.324/30.897 ms

 MvdV>> Almost three time as long as either of mine.

 BF>    Yep. But less than half the deviation. With response times as low
 BF> as this, mdev usually says more than the actual time.

Explain please.


Cheers, Michiel

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