解决无线网卡不能上网

$ cat /boot/loader.conf

zfs_load="YES"

vfs.root.mountfrom="zfs:zdisk"

vfs.root.mountfrom.options="rw"

vfs.zfs.prefetch_disable=0

if_bwn_load="YES"

bwn_v4_lp_ucode_load="YES"

wlan_ccmp_load="YES"

wlan_tkip_load="YES"

$ cat /etc/rc.conf

zfs_enable="YES"

hostname="roadgo.tong.com"

dbus_enable="YES"

hald_enable="YES"

wlans_bwn0="wlan0"

ifconfig_wlan0=" WPA DHCP ssid mytiantang channel 6 mode 11b "

$  pciconf -lv

siba_bwn0@pci0:4:0:0: class=0x028000 card=0x04b514e4 chip=0x431514e4 rev=0x01 hdr=0x00

    vendor     = 'Broadcom Corporation'

    device     = 'BCM4312 802.11b/g LP-PHY'

    class      = network

主要是将11g降为11b,但仍然有错误提示，不影响使用。