stein@bembu:~$ ifconfig  wlan0
wlan0     Link encap:Ethernet  HWaddr XXXX
          inet addr:xx.103.164.xx  Bcast:xx.103.255.255  Mask:255.255.0.0
          inet6 addr: fe80::XXXXXX/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:667 errors:0 dropped:0 overruns:0 frame:0
          TX packets:773 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:518210 (518.2 KB)  TX bytes:150684 (150.6 KB)

stein@bembu:~$ sudo dhclient -r 
[sudo] password for stein: 
Internet Systems Consortium DHCP Client V3.1.1
Copyright 2004-2008 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

wmaster0: unknown hardware address type 801
wmaster0: unknown hardware address type 801
Listening on LPF/pan0/c2:XXXXX
Sending on   LPF/pan0/c2:XXXXX
Listening on LPF/wmaster0/
Sending on   LPF/wmaster0/
Listening on LPF/eth0/00:20:XXXXX
Sending on   LPF/eth0/00:20:XXXXXX
Listening on LPF/wlan0/00:1c:XXXX
Sending on   LPF/wlan0/00:1c:XXXXX
Sending on   Socket/fallback
stein@bembu:~$ ifconfig  wlan0
wlan0     Link encap:Ethernet  HWaddr XXXXX
          inet addr:XX.103.164.XX  Bcast:XX.103.255.255  Mask:255.255.0.0
          inet6 addr: fe80::XXXX/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:683 errors:0 dropped:0 overruns:0 frame:0
          TX packets:786 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:519242 (519.2 KB)  TX bytes:151776 (151.7 KB)