“SwitchFanNotPresent_Alert” reported by CSHM for Cisco cluster network switches
Applies to
Cisco cluster network switches
Issue
The following “SwitchFanNotPresent_Alert” is reported by CSHM for all the fan modules of the cluster network switch:
Wed Apr 29 15:53:23 AEST [nodename: mgwd: callhome.hm.alert.major:alert]: Call home for Health Monitor process cshm: SwitchFanNotPresent_Alert[switch(XXXXXXXXXXX)/Fan Module-1].
Wed Apr 29 15:28:23 AEST [nodename: mgwd: callhome.hm.alert.major:alert]: Call home for Health Monitor process cshm: SwitchFanNotPresent_Alert[switch(XXXXXXXXXXX)/Fan Module-2]
Cause
- This issue is likely to occur when the cluster switches fail to fetch fan related information.
- The cluster switch health monitor (CSHM) can only detect that a fan or a power supply is missing when the queries to the switch fail to return information about all the fans or power supplies.
Solution
- Check if any maintenance activity was performed during the time the alert was reported by CSHM
- Verify if the alerts are cleared after some time, in the event logs:
cluster::> event log show
Time Node Severity Event
------------------- ---------------- ------------- ---------------------------
4/29/2020 15:49:12 nodename ALERT hm.alert.raised: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = switch(XXXXXXXXXXX)/Fan Module-1 raised by monitor cluster-switch
4/29/2020 16:10:20 nodename NOTICE hm.alert.cleared: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = switch(XXXXXXXXXXX)/Fan Module-1 cleared by monitor cluster-switch
- Login to both the cluster switches and verify if all the fan modules are operating in good condition, by running the following command:
Switch>enable
Switch#show environment fan detail
Fan:
---------------------------------------------------------------------------
Fan Model Hw Direction Status
---------------------------------------------------------------------------
Fan1(sys_fan1) NXA-FAN-30CFM-F 0.0 front-to-back Ok
Fan2(sys_fan2) NXA-FAN-30CFM-F 0.0 front-to-back Ok
Fan3(sys_fan3) NXA-FAN-30CFM-F 0.0 front-to-back Ok
Fan4(sys_fan4) NXA-FAN-30CFM-F 0.0 front-to-back Ok
Fan_in_PS1 N2200-PAC-400W -- front-to-back Ok
Fan_in_PS2 N2200-PAC-400W -- front-to-back Ok
Fan Zone Speed: Zone 1: 0x32
- If this is a one time event and the alerts are cleared on its own, then this can be safely ignored and no further action is required.
- If the issue persists, contact NetApp Technical Support for further assistance.