problème wifi/réseau bizarre

Hello,
J'ai r=C3=A9ussi =C3=A0 configurer mon wifi en wpa mais j'ai un probl=C3=A8=
me: quand je
d=C3=A9branche le cable d'eth0, ath0 est coup=C3=A9 aussi :\

mon fichier interfaces:

auto lo
iface lo inet loopback

auto eth1
iface eth1 inet static
address 192.168.0.5
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
# dns-* options are implemented by the resolvconf package, if
installed
dns-nameservers 192.168.0.1

auto ath0
iface ath0 inet static
wpa-driver madwifi
wpa-ssid mon_ssid
wpa-ap-scan 1
wpa-proto WPA
wpa-pairwise TKIP
wpa-group TKIP
wpa-key-mgmt WPA-PSK
wpa-psk "cl=C3=A9e_psk"
address 192.168.0.6
gateway 192.168.0.1
netmask 255.255.255.0
dns-nameservers 192.168.0.1

iwconfig ath0 donne:

ath0 IEEE 802.11g ESSID:"mon_ssid"
Mode:Managed Frequency:2.452 GHz Access Point: 00:11:22:33:44:5=
5
Bit Rate:54 Mb/s Tx-Power:18 dBm Sensitivity=3D0/3
Retry:off RTS thr:off Fragment thr:off
Encryption key:0000-1111-2222-3333-4444-5555-6666-7777 Security
mode:restricted
Power Management:off
Link Quality=3D12/94 Signal level=3D-84 dBm Noise level=3D-96 d=
Bm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

ifconfig ath0 donne:
ath0 Link encap:Ethernet HWaddr 00:11:22:33:44:55
inet addr:192.168.0.6 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: xxxx::xxxx::xxxx::xxxx Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:296 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:22619 (22.0 KiB) TX bytes:873 (873.0 b)

c'est une carte netgear ar5212 chipset atheros
j'arrive =C3=A0 pinger sans probl=C3=A8me sur les deux interfaces quand eth=
0 est
branch=C3=A9e, et d=C3=A8s que je d=C3=A9branche plus rien :(
--=20
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%A9seau-bizarre-tp20443639p20443639.html
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