#1 2018-03-28 19:15:14

Registered: 2018-03-28
Posts: 1

RTT on ipv4 vs. ipv6 (miniVPS - NL)


I have played around with the link between my dual stacked laptop and the miniVPS in NL (inception hosting) and found that the last couple of hops before the VPS introduce some delays which I don't have an explanation for, seen in the light that the ipv6 don't need NAT.
Eg 100 pings between me and the VPS:
IPv4 (I know its technical the NAT gateway I'am pinging):
100 packets transmitted, 98 received, 2% packet loss, time 99150ms
rtt min/avg/max/mdev = 34.946/41.127/66.479/5.753 ms
(I guess the drops are due to the NAT gateway dropping ICMP first if it have any load).

100 packets transmitted, 100 received, 0% packet loss, time 99116ms
rtt min/avg/max/mdev = 119.078/182.671/498.720/65.316 ms

Looking into the traceroutes it is clear that the delays seems to be introduced when the packes hits the networks at "i3d.net".

I would expect the ipv6 to faster or similar to ipv4 and not the actually 182 vs. 41 as it seems it is.
It is also consistence on TCP pings and traces, and also the direction does not matter.

Does anyone have a say on this?


Mr. Slinde

Last edited by slinde (2018-03-28 19:16:09)


#2 2018-03-28 21:38:23

Low End Boss
From: ~/
Registered: 2013-02-13
Posts: 3,936

Re: RTT on ipv4 vs. ipv6 (miniVPS - NL)

I can only assume at the time you tried it that some ICMP queuing/prioritization was going on at the core:

100 packets transmitted, 100 received, 0% packet loss, time 99473ms
rtt min/avg/max/mdev = 7.607/9.502/33.885/3.978 ms

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