Problem with Hetzner Subnet and Proxmox

[Zlyze]

Hello all together,
i got a Rootserver and an /29 Subnet from Hetzner. First of all we setup the Server with Proxmox without any problems.
But i got a couple of strange problems setting up the network-bridges and a "real" VM and i really don't get the problem.
Firewall is disabled. Not being able to ping out/in.

Subnet:

IP:	136.243.204.120
Mask:	255.255.255.248
Broadcast:	136.243.204.127

Hostconfig:

auto lo
iface lo inet loopback
iface lo inet6 loopback

auto enp0s31f6
iface enp0s31f6 inet static
        address y.y.39.251/26
        pointopoint y.y.39.193
        gateway y.y.39.193

iface enp0s31f6 inet6 static
        address 2a01:4f8:242:262c::2/64
        gateway fe80::1

auto vmbr0
iface vmbr0 inet static
        address x.x.204.126/29
        bridge-ports none
        bridge-stp off
        bridge-fd 0

VMconfig

auto lo
iface lo inet loopback

auto  eth0
iface eth0 inet static
  address x.x.204.121/29
  gateway x.x.204.126

 

[jochenmehlich]

iface enp0s31f6 is missing the netmask (255.255.255.224)

my vmbr0 look so:

iface vmbr0 inet static
address host-ip
netmask 255.255.255.255
gateway 144.76.93.225
pointopoint 144.76.93.225
bridge_ports enp3s0 (yours would be enp0s31f6)
bridge_stp off
bridge_fd 0
up ip route add vm-ip dev vmbr0
up sysctl -w net.ipv4.ip_forward=1


Hope this will fix your problem