Hi,All: Using KVM + libvirt + virt-manager, I meet a strange problem , some cloned vm cannot get correct ip address via bridge network, but some vm can. My host ip is 192.168.1.8 , a bridge interface br0 , an ethernet interface eth0 When the vm(win7) started ,I got the information like " ip 169.254.XXX.XXX netmask 255.255.0.0" by ipconfig Here is the host network settings: [root@kvm-8 ~]# ifconfig br0 Link encap:Ethernet HWaddr BC:AE:C5:21:C8:FB inet addr:192.168.1.8 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::beae:c5ff:fe21:c8fb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:59381 errors:0 dropped:0 overruns:0 frame:0 TX packets:52495 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:7078092 (6.7 MiB) TX bytes:50729969 (48.3 MiB) eth0 Link encap:Ethernet HWaddr BC:AE:C5:21:C8:FB inet6 addr: fe80::beae:c5ff:fe21:c8fb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:60238 errors:0 dropped:0 overruns:0 frame:0 TX packets:76409 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:8037333 (7.6 MiB) TX bytes:52546222 (50.1 MiB) Memory:fbee0000-fbf00000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:11312 errors:0 dropped:0 overruns:0 frame:0 TX packets:11312 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:36054480 (34.3 MiB) TX bytes:36054480 (34.3 MiB) virbr0 Link encap:Ethernet HWaddr D2:38:52:7D:0D:5D inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vnet0 Link encap:Ethernet HWaddr FE:54:00:A1:A1:90 inet6 addr: fe80::fc54:ff:fea1:a190/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:134 errors:0 dropped:0 overruns:0 frame:0 TX packets:247 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:24091 (23.5 KiB) TX bytes:15846 (15.4 KiB) [root@kvm-8 ~]# brctl shows: [root@kvm-8 ~]# brctl show bridge name bridge id STP enabled interfaces br0 8000.bcaec521c8fb yes eth0 vnet0 virbr0 8000.000000000000 yes [root@kvm-8 ~]# Any information would be appreciated Thank you! wade xuteng via foxmail