Subj : Unifi
To   : Brian Rogers
From : Michiel van der Vlist
Date : Wed Sep 15 2021 19:15:20

Hello Brian,

On Wednesday September 15 2021 11:30, you wrote to me:

 MvV>> A tunnel is good, native IPv6 is better. I noticed it too when I
 MvV>> used tunnels. IPv6 over the tunnel is significantky slower than
 MvV>> IPv4. Up to 50% slower. Native IPv6 is always preferable so we
 MvV>> we should all keep perstering our ISPs about IPv6.

 BR> If  you were getting that much of a slowdown, something else was going
 BR> on.

Sure. The frustrating part is that I was never able to figure out what it was.

 BR>  Granted the MTU is slightly and I mean slightly less than native
 BR> IPv6 or IPv4, but it's only by 20 bytes/1500 byte packet. Doing the
 BR> math, this does NOT equal a 50% lag.

Indeed, so it is not that.

 BR> Maybe the issue is that your ISP's path to your IPv6 tunnel provider
 BR> is not an optimum path? Mine is just a couple hops away so it's not an
 BR> issue for me.

Unlikely. I used the the he.net POP in Amsterdam, no-one in The Netherlands is more than a couple of hops from AMS-IX.

The prime suspect is still the router that ran my tunnel endpoint back than. A Linksys WRT54G running OpenWrt. But I could bever make sure.

Now it is irrelevent, I now have native IPv6 and I see no significant difference in pefomance between IPv6 and IPv4.

Cheers, Michiel

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