Where does Proxmox get the gateway IP?

Hi,

pardon my lack of networking understanding. I have vmbr0 assigned an IP, say, 10.10.10.10/24 with gateway 10.10.10.1. I then want to tag vlans on on bridge. So I try to create vmbr0.1080 with an IP 10.10.11.11/24 in vlan 1080 but if I specify vlan 1080 gateway IP in the web UI, it throws error:

Parameter verification failed. (400)

gateway: Default gateway already exists on interface 'vmbr0'

Click to expand...

If I don't specify the gateway and commit the changes anyway, somehow I am able...

Read more