Am 06/22/17 um 16:51 schrieb Stefan Sperling: > On Thu, Jun 22, 2017 at 04:05:27PM +0200, Marc Peters wrote: >> Is there any way for us to fix it or is it just a misconfiguration at >> Hetzner? > > It might help to look at what is actually going over the wire > while pings are stuck: tcpdump -n -i em0 ip6 >
right after flushing the ndp and trying to ping google: ~ # tcpdump -n -i em0 ip6 tcpdump: listening on em0, link-type EN10MB 17:52:55.907249 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:52:55.908742 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:52:56.901975 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:52:56.902528 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:52:57.901975 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:52:57.902535 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:52:58.911999 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:52:58.914579 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:52:59.911971 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:52:59.914208 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:00.911968 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:00.913858 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:01.912130 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:01.914075 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:02.911972 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:02.913241 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:03.911961 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:03.913586 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:04.912121 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:04.914017 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:05.827118 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 3374201201:3374201220(19) ack 2980031881 wi n 267 <nop,nop,timestamp 2273063251 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:05.911961 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:05.914806 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:06.826922 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 0:19(19) ack 1 win 267 <nop,nop,timestamp 2 273063253 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:06.911954 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:06.913726 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:07.912113 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:07.913632 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:08.826940 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 0:19(19) ack 1 win 267 <nop,nop,timestamp 2 273063257 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:08.911949 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:08.913862 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:09.911951 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:09.913609 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:10.912108 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:10.914284 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:11.911942 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:11.913738 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:12.826657 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 0:19(19) ack 1 win 267 <nop,nop,timestamp 2 273063265 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:12.911941 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:12.913520 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:13.912098 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:13.913934 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:14.911935 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:14.914060 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:15.911935 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:15.913487 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:16.912092 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:16.913561 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:17.911928 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:17.913791 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:18.911925 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:18.914068 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:20.791941 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:20.792476 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:20.826523 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 0:19(19) ack 1 win 267 <nop,nop,timestamp 2 273063281 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:21.791925 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:21.792468 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:22.791917 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:22.792472 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:35.791970 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:35.792466 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:35.806953 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 19:38(19) ack 1 win 267 <nop,nop,timestamp 2273063311 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:36.791905 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:36.792441 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] 17:53:36.825804 2a00:15a8:0:100:0:d91f:50aa:1.179 > 2a01:4f8:212:216c::1:443.26066: P 0:38(38) ack 1 win 267 <nop,nop,timestamp 2 273063313 659659698>: BGP (KEEPALIVE) [flowlabel 0x569b1] 17:53:37.791886 2a01:4f8:212:216c::1:443 > ff02::1:ff00:1: icmp6: neighbor sol: who has fe80::1 17:53:37.792437 2a01:4f8::a:21:b > 2a01:4f8:212:216c::1:443: icmp6: neighbor adv: tgt is fe80::1 [class 0xc0] ^C 380 packets received by filter 0 packets dropped by kernel
