Hi,

On one of my machines, I have two public IPv6 from two different
providers (one natively, another by VPN). I use ip -6 rule to make both
pingable.

I see some strange things on the native one. It stops responding from
time to time. Here are some examples of mtr:
https://paste.swordarmor.fr/raw/mXVT

At this time, the other IPv6 (bulbizarre.swordarmor.fr) works normally.

And if I do the same test on another machine in the same LAN, no loss:
https://paste.swordarmor.fr/raw/XGbK 

I have this routing table:
alarig@bulbizarre ~ $ ip -6 rule list 
0:      from all lookup local 
31010:  from 2a01:cb08:898c:fc00:9913:b7a:b9bf:d30c lookup 3215 
31100:  from all lookup 51083 
32766:  from all lookup main 
alarig@bulbizarre ~ $ ip -6 route show 
2a00:5881:4008:400::/64 dev tun0  proto kernel  metric 256  pref medium
2a01:cb08:898c:fc00::/64 dev eth0  proto kernel  metric 4  pref medium
fe80::/64 dev eth0  proto kernel  metric 256  pref medium
fe80::/64 dev tun0  proto kernel  metric 256  pref medium
fe80::/64 dev tun-mysql  proto kernel  metric 256  pref medium
default via fe80::20d:b9ff:fe3a:1fa1 dev eth0  metric 4  pref medium
alarig@bulbizarre ~ $ ip -6 route show table 3215
2a01:cb08:898c:fc00::/64 dev eth0  metric 1024  pref medium
default via fe80::20d:b9ff:fe3a:1fa1 dev eth0  metric 1024  pref medium
alarig@bulbizarre ~ $ ip -6 route show table 51083
default dev tun0  metric 1024  pref medium

I’m using the kernel 4.9.16-gentoo.

I’m running out of ideas, so I ask for your help :)

Thanks,
-- 
alarig

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