cancel
Showing results for 
Search instead for 
Did you mean: 
  • 1,957 Views

KVM Network devices

I've been reading the RHEL documetation on KVM as well as networking, and I'm trying to wrap my head around br#, virbr#, and virbr#-nic devices. I've played around with virt-manager all afternoon, and based on this activity, I understand the following to be correct:


1) a br# device is a host-OS-level device used to bridge two network interfaces, virtual, logical, or physical.
2) a virb# device is created to be the router/gateway for a virtual network, so if I create the virtual network 10.0.1.0/24, then 10.0.1.1/24 is a virbr# device.
3) a virbr#-nic device is a virtual NIC used by a guest OS???

Is this understanding correct? Thanks for your time reading my question!

Labels (1)
Tags (2)
0 Kudos
1 Reply
harpreetsingh
Flight Engineer Flight Engineer
Flight Engineer
  • 1,859 Views

Yes..!!! you got it correctly.

1. #br  is a bridge adapter which is giving direct access to external network to your guest os

2. whereas #virbr is working as a NAT adapter which is giving internal network so that guest vms can have ip address and they can have external access as well through this device.

3. and the last #virbr-nic, this is the NIC for guest vms.

0 Kudos
Join the discussion
You must log in to join this conversation.