j'ai reussi a reallouer une @ IP sur eth1.

donc voici route et ipconfig.

route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
192.168.30.0 * 255.255.255.0 U 0 0 0 eth1
default 192.168.30.1 0.0.0.0 UG 0 0 0 eth1

ifconfig
eth0 Link encap:Ethernet HWaddr 00:50:BA:B5:6B:CD
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::250:baff:feb5:6bcd/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:468 (468.0 b)
Interrupt:11 Base address:0xdc00

eth1 Link encap:Ethernet HWaddr 00:50:04:ED:41:B5
inet addr:192.168.30.10 Bcast:192.168.30.255 Mask:255.255.255.0
inet6 addr: fe80::250:4ff:feed:41b5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:850 errors:0 dropped:0 overruns:0 frame:0
TX packets:475 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:125025 (122.0 KiB) TX bytes:96794 (94.5 KiB)
Interrupt:10 Base address:0xef80