Why In Openstack Neutron with 'GRE' configured, two saparete OVS bridges ('br_tun' and 'br_int') are used rather than using a single OVS bridge?
Hi.
I want to know why two OVS bridges, the 'br_tun' and the 'br_int' is used, rather than a single OVS Bridge.
I know in current design how the both bridges works. But I'm not sure why they are different?
I've been searching in internet for a manual Virtual - Private -Segregated tenant based network setup.
http://trickycloud.wordpress.com/2014/05/02/multiple-private-networks-with-open-vswitch-gre-tunnels-and-libvirt/
In the above link, there is a 'br_eth0' is used. Can anyone please describe me the significance/reason of the Bridge. Is this the reason is same for having two different bridges, 'br_tun' and 'br_int' ?