We have a wireless system that sees roughly 30K unique clients pass
through each day. Our address space is set up as a single large /17, as
the Aruba controllers are extremely effective at controlling multicast
and broadcast... no need to segment the IP space in my opinion.
We have the default lease time set to 2 hours, with a maximum of 3
hours. Our address space typically sits at about 50% utilization. We
feel that this is a good configuration, as it leaves extra space for
special events, unknown emergencies, or address depletion attacks. The
load on our Bluecat DHCP servers is well under 25% and they are
extremely low end hardware, so it doesn't seem like 2 hours is too short.
Lawson Cassels
Network Engineer
Infrastructure, Operations, and Networking
Illinois State University
p: 309-438-4318
On 5/8/2018 7:52 AM, Ian Lyons wrote:
If you have Airwave one of the may "dials" is how long is your average
connection.
Mine is 28 minutes.
I set my lease time for WiFi for 1 hour. I have a /19, which might be overkill,
but with AD based DNS, I have poor insight into the things that go bump in the
night (for DNS)
If Cisco, I think there was a Prime option for this data too....
-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
<[email protected]> On Behalf Of Curtis K. Larsen
Sent: Monday, May 7, 2018 7:17 PM
To: [email protected]
Subject: [WIRELESS-LAN] DHCP Lease Times
Hello,
I'm curious to see what process/algorithm others use when determining DHCP
lease times for your Wi-Fi networks. Assuming plenty of IP addresses, what
DHCP lease time is ideal to assign to clients in a WLAN with 90,000 unique
clients/day, where avg. user spends 3hrs connected , but some (maybe 20%) go
several days, Keep in mind that 90% are the same user/device every day.
What level of DHCP pool utilization do you think is best? Have you found any
industry documentation on this? Thanks in advance.
-Curtis
**********
Participation and subscription information for this EDUCAUSE Constituent Group
discussion list can be found at http://www.educause.edu/discuss.
**********
Participation and subscription information for this EDUCAUSE Constituent Group
discussion list can be found at http://www.educause.edu/discuss.
**********
Participation and subscription information for this EDUCAUSE Constituent Group
discussion list can be found at http://www.educause.edu/discuss.
