now :
------------
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet manual

auto br0
iface br0 inet dhcp
        bridge_ports eth0



auto eth1
iface eth1 inet manual

------------------------------------------------
I need eth1 in a bridge also , but currently my
target is on eth1
What I think might right but sure won't work
-----------

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet manual

auto br0
iface br0 inet dhcp
        bridge_ports eth0

auto eth1
iface eth1 inet manual

auto br1
iface br1 inet manual
        bridge_ports eth1