From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrea G Forte Subject: IP aliasing and IP change delay. Date: Mon, 06 Dec 2004 19:28:04 -0500 Message-ID: <41B4F914.2070401@cs.columbia.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: To: netdev@oss.sgi.com Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Hello all, I am new to this list but I hope you can help me. I have been trying to use two different IP addresses on the same PCMCIA wireless card. For doing this I tried the classic ifconfig wlan0:0 inet xxx.xxx.xxx.xxx route ...... and I also tried ip address add xxx.xxx.xxx.xxx dev wlan0 The problem is that after I issue the command, the IP is actually changed several hundred of milliseconds later, while if I do not create an alias and change the IP twice on the same interface (using ifconfig), then the change of IP is really fast, practically it changes starting from the packet following the command. Anybody has some ideas why there is such a double behaviour if using wlan0 and wlan0:0 or using only wlan0?? Thank you very much for your help, Andrea