MSM 760 Controller - Connection Time Between Wifi Device To Msm Controller Is Very Long

[changjas]

Our c ompany is a school. We have a msm760 accesspoint controller, which governs 40 access points. Our wifi is slow. It had happened at 7:00am, 10:30am, 1:30am and it is not a particular branch and a particular time. Sometimes it does not happen at all. When problem happens, we notice the wifi devices located in a classroom building at one of a leg in our network takes very very long connection time to the controller. If you look at the screenshot, some of the milliseconds is 3000ms. [See screenshot]. But for wired internet, it is always 1 ms. So wired internet is fine.

Here is a brief network diagram setup. The msm760 controller is behind our firewall. All our devices are on one lan subnet on subnet range 10.10.0.1 to 10.10.7.254 on /21 subnet mask. On the msm 760 controller only the lan port is plugged in, and the wan port is unplugged. The lan port is on 10.10.6.2. Because only the lan port is connected and the wan port is unplugged, we are not using this msm controller for routing. At the top root of our network is another box that does routing.

Could you tell me what is some of the major possible problem causing slow connection time between wifi device and msm controller. Would you suggest us to isolate it that is only put the wifi device and the msm controller in the network, and see the ping connection time. This will have to be done during downtime. Any suggestions is greatly appreciated.

Sincerely,

Jason Chang

Kawaihona School

Hawaii

[Michael Grady]

What wireless access points are you using? What "Wifi Device(s)" are you using?

[Arimo]

Your screenshots shows the ping response time of the controller. This is not really related to the network performance as such, see http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03251146&sp4ts.oid=51023 for details.

Do you have a flat L2 network, or have you segmented it using VLANs?

Do you have this problem with all VSCs?

Are the VSCs experiencing the issue Access Controlled?

Whether your wireless client actually connects to the controller at all depends on how the VSC is created. If you have Access Control enabled, all the client traffic will be routed through the controller. If you have Authentication enabled, only the authentication traffic is sent to the controller, user traffic is directly egressed to the LAN from the AP port. If neither is enabled, the client does not communicate with the controller at all, but both authentication and user traffic are directly egressed into the wired LAN.