Hi all, I have 3 guests (2-RHEL4 and 1 RHEL6) and have some issues regarding networking between them. The 2 RHEL4 system's use default bridge virbr0 and get ip's of range <a href="http://192.168.122.0/24" target="_blank">192.168.122.0/24</a> (192.168.122.207, 192.168.122.167) I created another bridge (virbr1) with NAT forwarding (no dhcp). The network i choose was <a href="http://192.168.100.0/24" target="_blank">192.168.100.0/24</a>. And the third system (RHEL6) was assigned static ip-addres 192.168.100.101, From the RHEL6 system which uses virbr1 is able to ping systems in <a href="http://192.168.122.0/24" target="_blank">192.168.122.0/24</a> series , but guest systems in <a href="http://192.168.122.0/24" target="_blank">192.168.122.0/24</a> are not able to ping RHEL6 system (in virbr1) network. From the RHEL4 guests i am able to ping the gateway ip's (192.168.122.1, 192.168.100.1) , but not the RHEL6 system Versions: Fedora release 16 (Verne) libvirt-0.9.6.3-1.fc16.x86_64 qemu-kvm-0.15.1-8.fc16.x86_64 Any hints on what could be the problem Regards Niranjan