Controller Based WLANs

AP running AOS:6.4.3.x comes up in “restricted mode” while connected to third party switches
Q:

Why does AP running AOS:6.4.3.x comes up in “restricted mode” while connected to third party switches like Cisco, HP ?



A:

By default, the AP is able to receive LLDP packets from switch till it connects to the controller and retrieve the LLDP configuration.

Note: Thirdparty POE+ switches like HP and Cisco can't provide more power than AF(15.4W) until AP request AT power through LLDP. 

 

Prior to 6.4.3.x code, AP just checks the LLDP power in case of the HW state is POE-AF. If the HW state is POE-AT, AP will run in "unrestricted mode" regardless of LLDP power.

Example: (as per "show ap debug system-status" )
 

Power Status
------------
Operational State          POE-AT: No restrictions
----------------------               -----------------------------
Current HW State           POE-AT: No restrictions
LLDP Negotiated POE Power  6.6W


But 6.4.3.x  will set AP working as "restricted mode" if the POE+ switch can't provide more power than 19W through LLDP negotiation.

Example:

Power Status
------------
Operational State          POE-AF: One Ethernet port disabled; USB port disabled; 1x3 chain for 2.4GHz; 3x3 chain for 5GHz (Overridden by LLDP
-----------------          -----------------------------------------------------------------------------------------------------------------
Current HW State           POE-AT: No restrictions
LLDP Negotiated POE Power  6.6W


So if we need AP to run in "unrestricted mode", LLDP negotiation is must in AOS: 6.4.3.x and above.

Version History
Revision #:
2 of 2
Last update:
‎05-18-2016 01:40 PM
Updated by:
 
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