Why proxmox vmbr0 does have and ip config

[adam.piatek]

Hello there!

I have simple question: Why after fresh instalation my proxmox vmbr0 does have an ip address with gateway? Why only physicall device f.e. nic0 (which is also attached to vmbr0) cannot be configured like this? And basically, how bridge can have ip config? I thought it's treated as layer 2 switch
I know, that there was a thread about this, but i still don't get it after reading it.
I would appreciate any help!

 

[aaron]

The installer sets up things with sane defaults that will get most people started quickly. A Linux bridge can do a bit more and will happily accept an IP configuration. As do managed physical switches too.

If you do not like or need the default config, feel free to adapt it. For example, if that interface should only be used for the host management — and you have another physical NIC for the guests — you can remove the vmbr0 and assign the IP directly on the NIC, or bond, however you set it up.

Before you adapt the mgmt IP, make sure that you have another way to reach the host, in case things go wrong. This could be another IP on a different NIC, or access to the console to manually edit the /etc/network/interfaces file or the ip CLI tools to manually and temporarily, assign IPs.