Hey all, Very much the same case at UBC.
We have 30 minute DHCP timers (so 15 minute requests) active on 12x /21's... Without it we would be hosed. We'd like to go lower, but the load on the controllers (DHCP proxy) and the DHCP server (old SPARC) would likely become a problem. Thanks, Ian Procyk UBC IT Connectivity Infrastructure 604-8275707 -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of heath.barnhart Sent: Wednesday, September 30, 2009 11:40 AM To: [email protected] Subject: Re: [WIRELESS-LAN] wireless DHCP lease time We run 30 minute leases for most of SSIDs, no problems. We saw an unexpected boost in wireless usage this semester though, and had to go from /22 networks to /20 to accommodate the new users and leave room for expansion. Heath Garrett Harmon wrote: > We're running into some issues at the ramp up of a quarter with our > DHCP lease time attempting to utilize the /24's we currently pool for > our main essid. We moved from 1hr. to 30 minutes, but are still > running out of leases occasionally. For instance, we have 160 users in > a /24, but due to the transient nature of wireless/classes leases that > are used for a brief moment the cycle isn't quite efficient enough. > > What is everyone else using for wireless DHCP lease times? I know I > can just add another /24 to the pool, but the networks are not being > utilized enough. We want to try 15 minutes but are wondering if we > will start to run into issues related with that? Your input is greatly > appreciated!! > > > *Garrett Harmon* > Network Engineer > Office of Information Technology > The Ohio State University > 614.292.2122 (o) > 614.747.5539 (c) > > ********** Participation and subscription information for this > EDUCAUSE Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > -- Heath Barnhart Asst. Systems and Networking Admin Information Systems and Services Washburn University Topeka, KS 66621 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
