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Cisco Wireless Controller

Posted on 2013-11-27
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Last Modified: 2014-01-27
I have a Cisco network enviornment.  My core switch consists of 4 3750 switches, setup in a stack configuration, tied together with stack cables on the back.  I also have a Cisco Wireless Controller 4402.  The controller is connected to the switch stack via a fiber GBIC and a multimode fiber patch cord, about 1 meter long.  For some reason the controller will be accessable on the network for a while and then drop off for a while.  This cycle is repeated over and over again, no matter how I configure the ports on either device, the controller or the switch.  

It may not be any help, but I also have this trouble with my APC UPS NIC cards.  

How do I figure out what is wrong here?

Thanks
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Question by:wjlloyd
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6 Comments
 
LVL 46

Expert Comment

by:Craig Beck
ID: 39682290
What's in the logs on the switch stack?
Is there anything in the logs on the 4402?
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LVL 79

Expert Comment

by:lrmoore
ID: 39682523
The switchport to the controller is in trunk mode?
The controller ports are not in LAG mode?
Can you post the switchport configuration?
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Author Comment

by:wjlloyd
ID: 39689624
I'm not a Cisco expert so I use the Cisco Network Assistant to manage my Cisco equipment.  What commands do I need to use to obtain the log information you are requesting?  

My physical configuration is as follows:

Core Switch Stack
2 - 3750G 24T
2 - 3750 PoE-48

Remote Switch
1 - 3560 PoE-48

Wireless Controller
1 - 4402

The wireless controller is connected via a MM fiber GBIC from GigabitEthernet0/0/1 to GagabitEthernet2/0/4.
0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 

Accepted Solution

by:
wjlloyd earned 0 total points
ID: 39799697
It turned out that I had to use the second SFP port before it would work reliably.
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LVL 46

Expert Comment

by:Craig Beck
ID: 39799754
That's odd... I think you may need to upgrade the code on your WLC.  You 100% don't 'have' to use both ports, even if you do have LAG enabled.
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Author Closing Comment

by:wjlloyd
ID: 39811483
In the end it is what worked.
0

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