Symptom

In HA SSO pair, active WLC doesn't alert when standby unit's uplink goes down. Peer status shows STANDBY HOT and Ready. Example: lbg-1pbx-p2dc-wc09-1#show chassis rmi Chassis/Stack Mac Address : d4c9.3c0a.8280 - Local Mac Address Mac persistency wait time: Indefinite Local Redundancy Port Type: Twisted Pair H/W Current Chassis# Role Mac Address Priority Version State IP RMI-IP -------------------------------------------------------------------------------------------------------- *1 Active d4c9.3c0a.8280 2 V02 Ready 169.254.182.25 192.168.182.25 2 Standby 10b3.d5a5.8680 1 V02 Ready 169.254.182.26 192.168.182.26 lbg-1pbx-p2dc-wc09-1#show redundancy states my state = 13 -ACTIVE peer state = 8 -STANDBY HOT Mode = Duplex Unit = Primary Unit ID = 1 Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 147 client_notification_TMR = 30000 milliseconds RF debug mask = 0x0 Gateway Monitoring = Enabled Gateway monitoring interval = 8 secs Standby WLC shows recovery mode state from console: lbg-1pbx-p2dc-wc09-2(recovery-mode)#show redundancy Redundant System Information : ------------------------------ Available system uptime = 2 hours, 3 minutes Switchovers system experienced = 0 Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information : ------------------------------- Standby Location = slot 2 Current Software state = STANDBY HOT Uptime in current state = 1 hour, 51 minutes Image Version = Cisco IOS Software [Cupertino], C9800 Software (C9800_IOSXE-K9), Version 17.9.3, RELEASE SOFTWARE (fc6) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2023 by Cisco Systems, Inc. Compiled Tue 14-Mar-23 18:14 by mcpre BOOT = bootflash:packages.conf,12; CONFIG_FILE = Configuration register = 0x102 Recovery mode = Standby recovery mode Fast Switchover = Enabled Initial Garp = Enabled Peer (slot: 1, state: ACTIVE) information is not available because this is the standby processor

Conditions

Pair of 9800 WLCs in HA SSO redundancy, uplink of standby unit is down.

Workaround

Customer can use below command to check status lbg-1pbx-p2dc-wc09-1#show platform software rif-mgr chassis standby R0 resource-status RIF Resource Status RP Status : Up RMI Status : Down (Disabled) Current Chassis State : Standby-Recovery Peer Chassis State : Active

Further Problem Description