hello all, I have been trying to set-up bridged network with VLAN and not able to succeed as many tutorials address only single NIC. I am trying to setup 2 guests (backtrack instance) each guest has NIC1 and NIC2. following is snippet for guest1 I am not able to get 192.168.0.2 address back on guest eth0. VIRT-MANAGER GUI : guest1-lan details radio button left side panel NIC1 ------------------> Virtual Network Interface Source Device : Virtual Network "default" NAT Device Model : Hypervisor default MAc Address : xxxxxxxxxxxxxx NIC2 ------------------> Virtual Network Interface Source Device : Specify Shared Device Name Bridge name : guest1-lan Device Model : virto MAc Address : xxxxxxxxxxxxxx HOST MACHINE : brctl show has br0 for bridge and virbr0 with 192.168.122.x address (created by default virtual network NAT) /etc/sysconfig/network-scripts/ 1) Bridge BR0 (cat ifcfg-br0) DEVICE="br0" TYPE="Bridge" ONBOOT="yes" NM_CONTROLLED="no" BOOTPROTO="static" IPADDR="xx.xx.xx.xx" NETMASK="255.255.254.0" GATEWAY="xx.xx.xx.xx" DNS1="x.y.z.s" DNS2="x.y.q.s" 2) cat ifcfg-em1 NM_CONTROLLED="yes" HWADDR="02:12D:E2:B1:32" BOOTPROTO="static" DEVICE="em1" BRIDGE="br0" ONBOOT="yes" 3) ifcfg-em2 NM_CONTROLLED="yes" HWADDR="02:24:7e:d0:b1:42" BOOTPROTO="static" DEVICE="em2" ONBOOT="yes" 4) THIS IS GUEST (cat ifcfg-guest1-lan) DEVICE=guest1-lan TYPE=Bridge ONBOOT=yes BOOTPROTO=static DELAY=1 5) GUEST VLAN (cat ifcfg-em2.620) DEVICE=em2.620 VLAN=yes ONBOOT=yes BRIDGE=guest1-lan BRCTL Show Command : br0 8000.00237de0a132 no em1 vnet0 guest1-lan 8000.00237de0a133 no em2.620 virbr0 8000.5254003e19b3 yes virbr0-nic VIRSH : virsh # net-list Name State Autostart ----------------------------------------- guest1-lan active yes default active yes virsh # iface-list Name State MAC Address -------------------------------------------- br0 active 00:23:7d:e0:a1:32 guest1-lan active 00:23:7d:e0:a1:33 iface-edit : virsh # iface-edit guest1-lan <interface type='bridge' name='guest1-lan'> <start mode='onboot'/> <bridge delay='1'> <interface type='vlan' name='em2.620'> <vlan tag='620'> <interface name='em2'/> </vlan> </interface> </bridge> </interface> ------------------------------------------------------------------ /etc/libvirt/qemu/networks cat guest1-lan.xml <network> <name>guest1-lan</name> <uuid>a12747ec-21c9-0d21-ab06-064ba204bc52</uuid> <forward mode='bridge' dev="br0"/> <bridge name='guest1-lan' /> <ip address='192.168.0.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.0.2' end='192.168.0.254' /> </dhcp> </ip> </network> cat default.xml <network> <name>default</name> <uuid>8778244b-1a0c-c15f-c348-26462a07a639</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <mac address='52:54:00:3E:19:B3'/> <ip address='192.168.122.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> </dhcp> </ip> </network> any guidance will be appriciated regards dan