WLC5508 AP's not checking in - License issue?

[milty60]

I have verified via - Management - Licenses - base-ap-count permanent No Expiry 25 Medium In use

We have 17 AP's. 

We needed to reboot the switch and when it came back online we observed 9 AP's were missing from the Wireless list. We had this same issue about a year or so ago - I believe I found a Google hit then - that mentioned a license issue once AP's are over 10 yrs old. Our temporary fix was to change the date on the switch back a year or two. We did the same thing yesterday and our AP's started checking in. So, my question, since the switch appears to not have an expire for AP's do the individual AP's nevertheless have an expiring internal license - I don't quite understand the license model. 

I assume the permanent fix is to purchase licenses for the individual AP's that failed to logon? Or do I have an entirely different cause for those select AP's not checking in?

Thanks, 

Milty 

[d.friday]

I'm not sure what APs you are running,  try logging into the WLC via SSH and type in this command

config ap cert-expiry-ignore mic enable

[milty60]

My AP's AIR-LAP1141N-A-K9

I tried executing your offered command - those parameters don't exist. Here's a ? at config prompt for AP: 

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2020.02.27 08:18:38 =~=~=~=~=~=~=~=~=~=~=~=
ap ?

802.1Xuser Configures the dot1x user for AP.
SSH Enables/Disables SSH.
add Adds a Foreign Access Point.
bhrate Configures Cisco Bridge Backhaul Tx Rate.
bridgegroupname Sets/Deletes bridge group name.
bridging Enables/Disables Ethernet-to-Ethernet bridging.
cdp Enable/Disable CDP on Cisco AP.
core-dump Configures the AP's memory core dump.
country Configures the country of operation.
crash-file Manages crash data and radio core files.
delete Deletes a Foreign Access Point.
disable Disables Cisco APs
enable Enables Cisco APs
ethernet Configures Ethernet Port of the AP
flexconnect Enables/Disables VLAN on the flexconnect.
group-name Configures the group name.
hotspot Configures Hotspot configs on the AP.
image Configure image.
led-state Enables/Disables the LED-State or configure LED flash
link-encryption Capwap Data Link encryption options
link-latency Configures Link Latency Feature.

--More-- or (q)uit
location Configures the Location.
logging Configures the AP logging.
mgmtuser Configures the user for AP management.
mode Configures an AP's mode of operation.
monitor-mode Configures an AP's monitor-mode channel optimization.
name Configures the Name of an AP.
packet-dump Configure AP Packet Capture parameters
port Configures the port for a Foreign Access Point.
power Configures Cisco Power over Ethernet (PoE) feature for an AP
primary-base Configures the Primary Cisco Switch for an AP.
priority Configure the AP's priority.
reporting-period Configures the AP's rogue/error reporting period
reset Resets an AP
retransmit Configures AP Control packet retransmission parameters.
role Configures an AP's Bridge role of operation.
rst-button Enables or disables the Reset Button.
secondary-base Configures the Secondary Cisco Switch for an AP.
sniff Enables/Disables sniffing on a radio.
static-IP Enables/Disables/Changes an AP's static IP address configuration
stats-mode Configures the mode(realtime vs normal) in which statistics are sent from an AP
stats-timer Configures the frequency at which statistics are sent from an AP
syslog Configures the system logging settings for an AP
tcp-mss-adjust Configures TCP on Cisco AP.

--More-- or (q)uit
telnet Enables/Disables telnet.
tertiary-base Configures the Tertiary Cisco Switch for an AP.
tftp-downgrade Initiates AP's image downgrade from a TFTP server

(Cisco Controller) config>ap

Thanks, 

Milty 

[milty60]

I'm thinking my software is too old - command not available - can't download new software without existing contract 

Thanks, 

Milty