This recommendation is specific to Cisco Wireless IP Phones but if Aggressive
load balancing can cause a problem with an IP Phone it likely could cause the
exact same problem with Skype.
"• Aggressive load balancing must be disabled for each controller.
Otherwise, the initial roam attempt by the phone may fail, causing a disruption
in the audio path."
http://www.cisco.com/en/US/docs/wireless/controller/7.5/config_guide/b_cg75_chapter_01010100.html
Your students devices running Skype might be switching between APs at the
time they notice the problem. We had a similar problem with FlexConnect APs
and the DHCP required option, the problem was only triggered when devices
roamed from one AP to another but that turned out to be often enough to cause
significant problems for our students.
On Oct 23, 2013, at 8:16 AM, Dan Brisson <[email protected]> wrote:
> For you Cisco wireless folks out there, I'm curious if you have any
> thoughts/recommendations on "Client Load Balancing" in your Dorms/Residence
> Halls. I'm chasing a bunch of reports of wireless users being kicked off the
> network for no apparent reason. They are able to rejoin right away, but it's
> happening enough times that they've given up Skyping or other streaming
> Internet-based applications. The interesting thing is that we are not
> getting reports of this out in the Academic buildings but it occurred to me
> that our design is such that those APs join to a pair of WiSM2s while our
> Residence Hall APs join to a pair of 5508s. On the WiSM2s we have NOT
> enabled Client Load Balancing, but we did on the 5508s. The rationale we used
> was that if a wireless client had 2 APs within decent range, Client Load
> Balancing would help to keep the clients from all associating to one of the
> two APs. Now I'm wondering if something isn't working quite right and the
> result is users getting bounced.
>
> I have a TAC case open and so far the engineer has come back with upping the
> "Client user idle timeout" from 5 minutes to 1 hr. I'm not convinced that
> will help, but also curious if folks have thoughts on that recommendation.
>
> Thanks,
>
> -dan
>
>
> --
> Dan Brisson
> Network Engineer
> University of Vermont
> (Ph) 802.656.8111
> [email protected]
>
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---
Bruce Curtis [email protected]
Certified NetAnalyst II 701-231-8527
North Dakota State University
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