Not sure about finding the Manufacture date (maybe you are trying to find out about the presence of a MIC certificate) but we did go through this coversion from Autonomous to Lightweight on our infrastructure last summer.In this process we did convert about 70 1121's and 1231's to LWAPP and it worked very well. Here are some relevant docs;
Upgrading Autonomous Cisco Aironet Access Points to Lightweight Mode
Self-Signed Certificate Manual Addition to the Controller for LWAPP-Converted APs
LWAPP secures the control communication between the AP and the WLC by means of a secure key distribution. The secure key distribution requires already provisioned X.509 digital certificates on both the LAP and the WLC. Factory-installed certificates are referenced with the term "MIC", which is an acronym for Manufacturing Installed Certificate. Aironet APs that shipped before July 18, 2005, do not have MICs. So these APs create an SSC when they are converted to operate in lightweight mode. Controllers are programmed to accept SSCs for the authentication of specific APs.
The command (requires enable level) you want to determine if the AP has Manufacture Installed Certificates is: "test pb display"
Example below AP *HAS* MIC
ap1# test pb display
Display of the Parameter Block
Total Number of Records : 7
Number of Certs : 6
Number of Keys : 1
From an older AP without a MIC you get:
ap2# test pb display
Parameter Block Doesnt have any Records
Separately, has anyone come up with a way to put the necessary SSCs into an older AP *without* using that PC based upgrade tool? We want a way where we can define SSCs and capture the SHA1 Hashes well in advance of us upgrading the AP firmware and switching away from autonomous mode.
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