There are few more useful commands we can use on the Linux bridge.
We already know that a bridge forwards frames based on the MAC addresses contained therein. To examine the table of MAC addresses the bridge knows about, run the following command:
root@kvm:~# brctl showmacs virbr0port no mac addr is local? ageing timer 1 52:54:00:55:9b:d6 no 268.02 1 fe:54:00:55:9b:d6 yes 0.00root@kvm:~#
From the preceding output, we can see that the bridge has recorded two MAC addresses on its only port. The first record is a nonlocal address, and it belongs to the network interface inside the KVM instances. We can confirm that by connecting to the KVM guest as follows:
root@kvm:~# virsh console kvm1Connected to domain kvm1Escape character ...