I would like to know how many AP's does WLC 2504 supports? As per the data sheets it supports 75 AP then why is the part number is still AIR-CT2504-50-K9 (where 50 is AP?)
You are correct as per model AIR-CT2504-50-K9, 50 means that the maximum number of APs supported on this WLC is 50.
But, 7.4 WLC release increased scale on 2504 WLC. Previously, it could support max of 50 APs.
From the 7.4 WLC release notes:
"Increased scale for Cisco 2500 Series Controllers to support 75 access points and 1000 clients."
I suggest if you upgrade to 7.4 you will get the full AP count as expected.
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