OVH IPV6 connection drops on VMs

[Vengance]

Hey there,

I've ordered a OVH server in BHS a few days ago which I'd like to use it as a backup server and run Proxmox on it.

However my Debian 11 VMs keep loosing the IPv6 connection after some time and I've got no idea why.
The host itself seems to keep the IPv6 connection however.


I've attached my network, ndppd, sysctl and radvd config below.


Thank you!

#/etc/ndppd.conf

route-ttl 30000
  proxy eth0 {
   router no
   timeout 500
   ttl 30000
   rule 2607:xxxx:60:a57::/64 {
    static
   }
  }

# /etc/sysctl.conf

net.ipv6.conf.all.proxy_ndp = 1
net.ipv6.bindv6only = 0
net.ipv6.conf.all.forwarding=1
net.ipv6.conf.all.autoconf=0
net.ipv6.conf.all.accept_ra=0

# /etc/radvd.conf
interface vmbr0 {
  AdvSendAdvert on;
  prefix 2607:xxxx:60:a57::/64
  {
    AdvOnLink on;
    AdvAutonomous on;
  };
RDNSS 2606:4700:4700::1111 {
        AdvRDNSSLifetime 3600;
 };
};

# network interfaces
 auto lo
   iface lo inet loopback


 auto eth0
   iface eth0 inet dhcp

    iface eth0 inet6 static
    address 2607:xxxx:60:a57::2
    netmask 128
    post-up /sbin/ip -f inet6 route add 2607:xxxx:60:aFF:FF:FF:FF:FF dev eth0
    post-up /sbin/ip -f inet6 route add default via 2607: xxxx:60:aFF:FF:FF:FF:FF
    pre-down /sbin/ip -f inet6 route del 2607: xxxx:60:aFF:FF:FF:FF:FF dev eth0
    pre-down /sbin/ip -f inet6 route del default via 2607: xxxx:60:aFF:FF:FF:FF:FF


  auto vmbr0
    iface vmbr0 inet6 static
    address 2607: xxxx:60:a57::2
    netmask 64
    bridge_ports none
    bridge_stp off
    bridge_fd 0
    bridge_maxwait 0
    post-up echo 1 > /proc/sys/net/ipv6/conf/all/proxy_ndp
    post-up echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
    post-up echo 1 > /proc/sys/net/ipv6/conf/default/forwarding

 

[harry_cox]

Any luck on this? Same thing is happening to me and it's driving me crazy.

 

[Vengance]

No, migrated the box to Hetzner, which works just fine.