how to start virtualized domain network manually

Hello All,

i am trying to handle the virtualized domain network manually…before i restart network i have this bridge UP

vif2.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:45 errors:0 dropped:72 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0 b) TX bytes:7550 (7.3 Kb)

but when i restart the network then it disapppears, any idea on how to UP it.

Regards,
Ghulam Yaseen

please help me!