Problematic version was 0.0.20161025. I upgraded kmod to 0.0.20161103 at it works fine now.
> Hi k, > I'll look into this. Which snapshot are you using? Or, which commit is this? > Jason > On Fri, Nov 4, 2016 at 5:01 PM, <[email protected]> wrote: >> I'm trying to connect 2 endpoints with wireguard. >> One endpoint has MTU of inet inteface 1500, another 1456. >> To prevent packet fragmentation on inet interface i set up mtu 1383 for both >> wg interfaces. Checked that no frag occurs on inet interface in wireshark. >> Maximum packet data size is 1383-28 = 1355. Checked with no-fragment ping, >> packets pass well. >> >> First I checked packet loss between inet IPs >> >> iperf -c x.x.x.x -u -b 25M -l 1400 >> 0.0-10.3 sec 29.6 MBytes 24.2 Mbits/sec 16.073 ms 175/23090 (0.76%) >> >> packet loss always within 0.5..1%. its normal >> now I try to do the same with much less bandwidth between wireguard ips >> on packet size <=1252 packet loss rate is 0.5..1% >> >> iperf -c 192.168.254.65 -w 500000 -u -b 1M -l 1252 >> 0.0-10.0 sec 1.18 MBytes 991 Kbits/sec 0.659 ms 9/ 1000 (0.9%) >> >> but starting from packet size 1253 packets loss greatly increases. its 6..10% >> >> iperf -c 192.168.254.65 -w 500000 -u -b 1M -l 1253 >> 0.0-10.0 sec 1.12 MBytes 936 Kbits/sec 0.328 ms 64/ 998 (6.4%) >> >> Thats why TCP is incredibly slow. If I set up mss for TCP to not exceed >> packets size threshold TCP is fast. >> >> _______________________________________________ >> WireGuard mailing list >> [email protected] >> http://lists.zx2c4.com/mailman/listinfo/wireguard -- С уважением, K mailto:[email protected] _______________________________________________ WireGuard mailing list [email protected] http://lists.zx2c4.com/mailman/listinfo/wireguard
