一个关于dhclient的问题。

llzzccc

发现一个问题，不知道是因为dhclient 还是因为无线网卡驱动。

用dhclient取动态地址，总会有一个关闭网口，然后马上打开的动作，log如下：

Jul 21 06:42:55 localhost dhclient: DHCPREQUEST on wlan0 to 192.168.4.1 port 67
Jul 21 06:42:55 localhost dhclient: DHCPACK from 192.168.4.1
Jul 22 14:19:44 localhost dhclient: All rights reserved.
Jul 22 14:19:44 localhost dhclient: For info, please visit http://www.isc.org/sw
/dhcp/
Jul 22 14:19:44 localhost dhclient:
Jul 22 14:19:44 localhost dhclient: Listening on LPF/wlan0/00:0e:2e:fd:4e:b3
Jul 22 14:19:44 localhost dhclient: Sending on   LPF/wlan0/00:0e:2e:fd:4e:b3
Jul 22 14:19:44 localhost dhclient: Sending on   Socket/fallback
Jul 22 14:19:44 localhost dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 por
t 67 interval 3
Jul 22 14:19:45 localhost dhclient: DHCPOFFER from 192.168.253.1
Jul 22 14:19:45 localhost dhclient: DHCPREQUEST on wlan0 to 255.255.255.255 port
67
Jul 22 14:19:45 localhost dhclient: DHCPACK from 192.168.253.1
Jul 22 14:19:45 localhost kernel: => usb_rtusb_open
Jul 22 14:19:45 localhost kernel: => usb_rtusb_open
Jul 22 14:19:45 localhost NET[1707]: /sbin/dhclient-script : updated /etc/resolv
.conf
Jul 22 14:19:45 localhost dhclient: bound to 192.168.253.133 -- renewal in 41529
seconds.
Jul 22 14:19:45 localhost dhclient: receive_packet failed on wlan0: Network is down


为什么会这样呢？谢谢

llzzccc

哪位大侠能指点一下吗？