Homelab setup - 2 network interfaces

[Miyamoto_Musashi]

Hello colleagues,

I am building homelab on Proxmox.

My setup :

- Isolated environment - network 10.10.10.x (vmbr0)
- for updating of VMs I sometimes need to access to internet (vmbr1 interface defined)
- Idea is that for updating purpose I will temporary reconfigure the VM to use vmbr1

The problem is when I temporary reconfigure the VM to use vmbr1, the connection to internet from VM is not available.

Can you please help me (network config below) ?

Thanks,
M.

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual
address 192.168.1.100
netmask 255.255.255.0
gateway 192.168.1.1


auto vmbr0
iface vmbr0 inet static
address 10.10.10.10
netmask 255.255.255.0
bridge_ports none
bridge_stp off
bridge_fd 0


auto vmbr1
iface vmbr1 inet static
address 10.10.10.10
bridge-ports none
bridge-stp off
bridge-fd 0
bridge-vids 2-4094

post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up iptables -t nat -A POSTROUTING -s '10.10.10.0/24' -o eno1 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '10.10.10.0/24' -o eno1 -j MASQUERADE

 

[wolfgang]

Hi,

the problem here is the routing table.
you can't have two identical subnets.
The Kernel will always process the first rule that fits.
so the second will ignored forever.