2016-04-03: rewrite the original cmk check 2016-05-24: added admin/operational state, fix for missing ap_name parameter 2016-07-01: added long output 2016-07-06: fixed: missing ap 2018-01-05: cosmetic changes, added metrics/cisco_wlc.py 2018-05-23: changed scan function, changed return values to yield code cleanup, removed unused oid's 2018-07-26: added code for incomplete ap data (missing lwap, data) 2018-08-03: changed cdp info: short interface name, dropped neighbor domain name, added S/N and Model to longoutput 2018-09-14: fixed issue with missing AP, fixed issue with SSH check 2021-07-16: rewrite for CMK 2.0 2021-07-17: added basic support for IOS-XE based WLAN controllers (C9800 family), without most of perfdata fixed _render_mac_address/_render_ip_address, code cleanup, removed WIPS check added lwap_uptime/time taken to join. changed perfdata to 1/s 2021-07-29: fix missing data from discovery (inv_ap_info)