Symptom

HA WLC simply reboots due to peer Redundancy Port Keepalives loss. WLC comes back and continues working as expected. Logs before rebooting: %RMGR-0-RED_HA_RELOAD: [SM]rmgr_utils.c:266 System is rebooting, reason: Peer-RMI, peer-RP and management default gateway are reachable, category:Rebooting WLC as auto recovery is possible %RMGR-3-RED_HA_KA_STATS: [SS]rmgr_main.c:731 Keep-alive stats: peer RP KA loss count X, peer RMI KA received count Y %RMGR-3-RED_HEARTBEAT_TMOUT: [SS]rmgr_sm.c:1877 Standby WLC has lost keep-alives with peer. %RMGR-3-RED_HA_KA_STATS: [SS]rmgr_main.c:731 Keep-alive stats: peer RP KA loss count X-1, peer RMI KA received count Y-3 Output from "Last Reboot MsgLog & Traplog" would show Planned Reset even when there was not planned reset at all. --------------------------------------------- Last Reboot MsgLog & Traplog --------------------------------------------- Sys Name: XXXXXXXXX Model: AireOS-model Version: 8.10.162.0 Primary Boot Image: x.x.x.x Backup Boot Image: y.y.y.y LastReset Reason: Planned Reset Timestamp: XXXXXXXXXXXXXXXX

Conditions

WLCs in HA SSO running 8.10.162.0 codes and above, which should have previous similar bug CSCvs49779 fixed - HA Link Encryption must be enabled to face this bug, as the issue is triggered by the Link Encryption feature.

Workaround

Disable HA link encryption if RP is connected back-to-back Configure higher number of KA retries

Further Problem Description