Meru Technical Note - Wireless Projectors dropping off the network

Wireless Projectors dropping off the network; Wireless Projectors loose connection after some time. NEC LT 380 and LT 280 projectors are unable to sustain the connection.

KB ARTICLE TYPE: Troubleshooting

RELATED PRODUCTS: MC3050, AP300

RELATED SOFTWARE VERSIONS: 3.4-135

KEYWORDS: NEC Projector LT 380, LT 280, controller, ESS

STEPS TAKEN FOR TROUBLESHOOTING:

STEP 1: Created a new ESS profile, mapped it to WEP security profile and associated it with a VLAN.

STEP 2: Enabled the port 7142 for upstream and downstream traffic. Projector uses port 7142 for communication.

STEP 3: Prevented the Projector to go to sleep mode. Power save options were turned off,

STEP 4: DTIM Period on that ESS was set to 1

STEP 5: Prioritized the traffic originating from Projector’s VLAN by defining a subnet based QoS rule in the controller.

RESOLUTION: Projectors were able to sustain the connection.

ROOT CAUSE: It could not be identified conclusively as I had to modify multiple attributes in the configuration.