where did this bridge come from

[pattonb]

I setup a vm and then I see a bridge was automatically setup, however it is not using
the subnet I am using for the inside network. How can I change it ? I did not see anything in the gui.
I am not using a 192.168.122.X subnet anywhere.

vm2 --
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 82:dd:d8:06:bc:bd brd ff:ff:ff:ff:ff:ff
inet 192.168.23.11/24 brd 192.168.23.255 scope global dynamic noprefixroute ens18
valid_lft 312sec preferred_lft 312sec
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:2d:10:0e brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:2d:10:0e brd ff:ff:ff:ff:ff:ff

 

[oguz]

hi,

this is from inside the VM?

VM guest network management is done inside the guest

 

[pattonb]

I know it is a bridge within the guest. I am asking how to did it get there. I did not configure one, and would not have used the 192.168.122.1 network.

 

[t.lamprecht]

What distro is running in the guest?

If this is a VM (please confirm that it's a VM and not a Container) then Proxmox VE has no influence on network devices inside the VM, so I'd rather check with the distros' user support.

Side note, Docker or other container manager daemons often add such bridges to manage the network for the containers - did you have setup something like this?

 

[pattonb]

no container, it is an oracle linux 8 install, ( due to the forthcoming changes with centos)
definitely a vm.
vm is 100 (oracle), pic attached from the web gui

 

[t.lamprecht]

Yeah, then that bridge is the business of the VM, Proxmox VE could only control parts of the VMs inside network with tools like cloud-init, but that seems to be not configured, so I'd dare to say that this is purely an "issue" with Oracle Linux.

But, in anyway, what's your actual problem with that separate bridge and a local network on it? It seems purely virtual (i.e., in above IP output there's no outside NIC shown with that bridge as its "master" port)...

A quick check, as that IP range seemed famillar to me, confirmed: it's coming from libvirt:
https://docs.openstack.org/mitaka/networking-guide/misc-libvirt.html

 

[pattonb]

ok, thanks, I will have a look at the linked article.