[SOLVED] Proxmox host using wrong bridge to mount fstab

Z

zemerdon

New Member
Aug 22, 2025
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Wondering why the Proxmox host is trying to mount it's fstab through vmbr2 and not vmbr0. Is it possible at all to tell it what to do ? Any opinions/help/advise would be appreciated.

I've double checked all the ports are going to their respective VLANs on the Cisco 3650 switch and they are correct.

Proxmox on a r730XD using a quad port NIC.

port1 10gb
port2 unused
port3 1gb vlan10
port4 1gb vlan30

/etc/network/interfaces

auto lo
iface lo inet loopback

iface nic0 inet manual

iface nic1 inet manual

iface nic2 inet manual

iface nic3 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.2.7/24
gateway 192.168.2.1
bridge-ports nic0
bridge-stp off
bridge-fd 0

auto vmbr1
iface vmbr1 inet static
address 10.10.10.3/24
gateway 10.10.10.1
bridge-ports nic2
bridge-stp off
bridge-fd 0

auto vmbr2
iface vmbr2 inet static
address 30.30.30.2/24
gateway 30.30.30.1
bridge-ports nic3
bridge-stp off
bridge-fd 0
 
Hey,

what is the IP in question? I assume it is on none of the networks that the interfaces have IPs assigned on. Generally there is only one gateway, if you have multiple specified only one will actually be used. Based on your description I assume it's 30.30.30.1. You can check with ip r, there should be a default via ... entry. If you want your default gateway be through vmbr0, you want the gateway to be on the network vmbr0 has its address on.
 
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Hannes Laimer said:
Hey,

what is the IP in question? I assume it is on none of the networks that the interfaces have IPs assigned on. Generally there is only one gateway, if you have multiple specified only one will actually be used. Based on your description I assume it's 30.30.30.1. You can check with ip r, there should be a default via ... entry. If you want your default gateway be through vmbr0, you want the gateway to be on the network vmbr0 has its address on.
Click to expand...
Thank you for your speedy reply. You were correct, 30.30.30.1 was used, and was the default gateway.

I kept trying to overcomplicate things heh, easy to do with networking.

So yes, only have the one gateway for the 192.168.1.0/24 and removed the static routes. Everything working perfectly thank you.
 
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