Symptom

This is APSP - AP Service Pack to fix AP issues. The base Catalyst 9800 version must be 17.9.3 to install this APSP. APSP version : AP Platforms : All COS APs WLC Platform : 9840 & 9880 , vWLC , 9800-L, Cat9k (9300,9400,9500)

Conditions

The following bugs are resolved in this APSP1 CSCwe04602 COS AP fails to forward traffic to wireless client for about 60 seconds in SDA Fabric WLANs CSCwd91054 COS-APs not encrypting EAP_ID_REQ after M1-M4 and not updating PMK CSCwe55390 3802AP buffering UP6/voice traffic~500ms after Spectralinkphone roam causing audio issues CSCwe88776 EWC capable MAP waiting 3 mins in capwap init CSCwe66515 9136 AP in 17.9.2 version not registering the M2 response from client

Workaround

Further Problem Description

When installed, WLC reload is not required and WLC will not reload. Once installed, APs (Access points) will proceed to update images and go with staggered reboot. The following installation instructions can be followed: (page 6 onwards) https://www.cisco.com/c/dam/en/us/td/docs/wireless/controller/9800/17-1/deployment-guide/c9800-ha-rau-apsp-apdp-issu-rel-17-1.pdf