How big are your subnets the APs reside on, and how is your latency from the controllers to the APs? I know the APs are latency sensitive.

Mike

On 1/31/2012 8:44 AM, Scott Smith wrote:
We installed around 700 over the summer in our residence halls as well.

I've seen the same issue. However we've never had WCS until the same
project. I'm starting to wonder as well.

Yup....it's a Droid !!!

On Jan 31, 2012 7:39 AM, "Dan Brisson" <[email protected]
<mailto:[email protected]>> wrote:

    I'm curious if any Cisco users out there are experiencing or have
    experienced what we're seeing on our campus.  This past summer we
    installed 3502i's in all of our residence halls - approximately 500
    total.  Ever since the students have moved in, we will get messages
    from WCS stating that "AP XYZ" is down and disassociated from the
    controller.  When I check out the AP, the uptime is fine, but the
    "CAPWAP join time" is for like 30 seconds, or however long it took
    me to check.

    We've tracked this and it is totally random as to what AP will drop,
    which makes troubleshooting this very tough.  The log on the AP
    isn't helpful.  I'm working with TAC who suggests that keepalives
    are getting missed.  I'm not sure why that would be the case since
    we have another 500 or so APs on the admin side that very rarely
    drop.  Adding to that, when the students left for break, the AP
    drops stopped.  They came back, and sure enough, the drops start up
    again.

    I will say that the AP always joins back immediately, but for the
    time that it does drop A) I'm sure connectivity is affected in that
    area and B) we get an email.

    Anyone experiencing this?

    Thanks,
    -dan


    --
    Dan Brisson
    Network Engineer
    University of Vermont
    (Ph) 802.656.8111 <tel:802.656.8111>
    [email protected] <mailto:[email protected]>

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Mike Goebel
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Office of Information Technology
Western Michigan University
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Email: [email protected]

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