We've been using interface groups for some time and like most people on here you'll notice that the same mac address will show up in dhcp table. We initially setup our dhcp (linux) for 8 hour leases and then quickly realized that we would exhaust the scopes. We tuned them down to 1 hour and seems to be good now. I talked with a Cisco wireless employee and he feels very comfortable using 20 minute lease times for "most" wlans.
Also there is a command on the wlc that allows you to view which interfaces are "dirty" and won't allow dhcp requests for 30 minutes I believe. Craig Eyre Network Analyst IT Services Department Mount Royal University 4825 Mount Royal Gate SW Calgary AB T2P 3T5 P. 403.440.5199 E. [email protected] "The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather in a lack of will." Vincent T. Lombardi From: Vikki Cutrone <[email protected]> To: [email protected], Date: 02/15/2013 12:13 PM Subject: [WIRELESS-LAN] Cisco Wireless Interface Groups Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv <[email protected]> Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.__________________________________________________________________________ This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal, and or privileged information. Please contact the sender immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
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