Setup: HOST: F11 x86_64 GUEST: F12beta x86_64 I have a number of guests setup on this host and all connect without a problem with the 'br0' bridge on the host. I created a new guest and loaded F12beta on it. I defined it to also use 'br0' networking but this guest cannot ping anything on the LAN. All the other guests have no problems communicating to addresses on the LAN. Details: ### on HOST: # brctl showmacs br0 port no mac addr is local? ageing timer 1 00:0b:82:11:bc:cb no 15.88 3 00:0c:01:30:50:00 no 16.37 2 00:0c:01:40:50:00 no 2.51 1 00:0c:29:e3:bc:ee no 0.49 1 00:18:f8:48:27:15 no 2.51 1 00:18:f8:9b:ba:b4 no 116.39 1 00:18:f8:9b:ba:b5 no 20.60 1 00:1a:4d:5e:f6:36 no 156.43 1 00:24:1d:19:05:cf yes 0.00 3 06:1d:1d:7a:31:9b yes 0.00 2 06:ba:11:dd:7b:08 yes 0.00 1 54:52:00:24:5e:cf no 28.93 # EXISTING GUEST: network interface in xml file: <interface type='bridge'> <mac address='00:0c:01:30:50:00'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> </interface> # NEW GUEST: network interface in xml file: <interface type='bridge'> <mac address='00:0c:01:40:50:00'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> </interface> ### on EXISTING GUEST: DEVICE=eth0 ONBOOT=yes BOOTPROTO=static HWADDR=00:0c:01:30:50:00 IPADDR=192.168.1.200 NETMASK=255.255.255.0 NETWORK=192.168.1.0 ### on NEW GUEST: DEVICE=eth0 ONBOOT=yes BOOTPROTO=static HWADDR=00:0c:01:40:50:00 IPADDR=192.168.1.210 NETMASK=255.255.255.0 GATEWAY=192.168.1.1 NETWORK=192.168.1.0 TYPE=Ethernet IPV6INIT=no USERCTL=no ### on EXISTING GUEST: # ping 192.168.1.1 succeeds ### on NEW GUEST: # ping 192.168.1.1 fails with Destination Host Unreachable Is there something else I need to configure in F12beta to get this working? -Gerry