We have quite a few wireless networks set to 15 minutes
with no adverse affects.
Dale
On Sep 30, 2009, at 3:43 PM, Ryan Holland wrote:
Philippe,
We saw improvement moving from 1 hour to 30 minutes with no foreseen
adverse affects. We are testing a few subnets on 15 minute leases,
as it would be more practical to avoid any "waste" of leases for the
5 minute email/facebook check on an iPhone/iPod-Touch. I'll let you
know if we run into problems.
Our setup is similar, with an external DHCP server running ISC, and
we're of course using Aruba as well. Our aaa timers are 15 minutes
(900 seconds).
------------------
Ryan Holland
Network Engineer, Wireless
CIO - Infrastructure
614-292-9906 [email protected]
On Sep 30, 2009, at 4:33 PM, Philippe Hanset wrote:
What a timely discussion!
This morning we noticed that our pools (Aruba VLAN pools, 32* /24)
were being filled from 70 to 90%.
Our lease time is 3 hours. As most of you, we have been hammered by
Iphone/Ipod-touch (~4000 registered at the moment)
For a campus population of 30,000 (25,000 students 5000 fac/staff).
Has anyone seen issues with 30 or 40 minutes DHCP leases on an
Aruba infrastructure ?
(we don't run DHCP on Aruba, but on ISC DHCP)
What AAA timeout have you implemented? (show AAA timers... in our
case we have 1800 sec)
(we had to shorten the AAA timeout as well because our User
licenses were being exhausted
... Iphone again ;-)
Thank you
Philippe Hanset
Univ. of TN
On Sep 30, 2009, at 2:52 PM, Steve Hess wrote:
We run 4 /23's (one per class) with 4 day lease times. It's very
tight right now for freshmen and sophomore's but lots of room for
juniors and seniors. Each class is about 350-450 students. I'm
looking to add another /23 per class to provide some head room.
We run 4 day lease times for the forensic aspect of it.
Definitely seeing more wireless devices this year. Upperclassmen
are registering computers. Underclassmen are registering a
computer (or two), an iPhone/iPod, and a gaming device. For those
of you running the /22's and /20's, you don't see performance
issues with broadcast domain's that large? Our wireless vendor
(Alcatel/Aruba) highly suggested shrinking the broadcast domain
(we had been running one /22 for all students).
Steve
heath.barnhart wrote:
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)
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--
-----------------------
Steve Hess
Network Administrator
Wheaton College
Phone: 508-286-3404
Fax: 508-286-8270
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