[SOLVED] Linux Bridge not working

[vanlueckn]

Hello all,

I have a proxmox 7.1-12 instance and I use an IPv4 bridge there called vmbr1. Unfortunately I can't ping the VM and the host via vmbr1, there seems to be no traffic at all.

Host Config:

auto lo
iface lo inet loopback

auto enp9s0
iface enp9s0 inet static
        address 85.10.202.202/27
        gateway 85.10.202.193
        pointopoint 85.10.202.193

iface enp9s0 inet6 static
        address 2a01:4f8:a0:44ed::2/128
        gateway fe80::1
        up sysctl -p

auto vmbr0
iface vmbr0 inet6 static
        address 2a01:4f8:a0:44ed::3/64
        bridge-ports none
        bridge-stp off
        bridge-fd 0
        up ip -6 route add 2a01:4f8:a0:44ed::/64 dev vmbr0

auto vmbr1
iface vmbr1 inet static
        address 10.187.0.254/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up iptables -t nat -A POSTROUTING -s '10.187.0.0/24' -o enp9s0 -j MASQUERADE
        post-down iptables -t nat -F

VM Config:

auto lo
iface lo inet loopback
    dns-nameservers 2a01:4f8:221:2d08::213 2a0b:f4c0:4d:53::1
    dns-search stoffi.xyz

auto eth0
iface eth0 inet6 static
    address 2a01:4f8:a0:44ed::10/64
    gateway 2a01:4f8:a0:44ed::3

auto ens19
iface ens19 inet static
  address 10.187.0.1/24
  gateway 10.187.0.254

Both the vm and the host seam to be not connected via 10.187.0.0/24 / vmbr1. The bridge vmbr0 ist working fine.

 

[spirit]

are you sure that you have eth0 && ens19 names at the same time in your vm ?

what is the result of "ip addr" ?

 

[vanlueckn]

The interface names are correct.
I solved the issue by allowing icmp in the firewall.

 

[blade]

how is connection to a bridge thats not bridged to anything supposed to work? lol