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dwivedis
Staff
dwivedis
Staff
May 6, 2025

Troubleshooting Tip: FortiSwitch MAC Cache Blank and Sync Status Stuck in Pending

  • May 6, 2025
  • 0 replies
  • 608 views
Description This article describes how to troubleshoot issues where the MAC cache appears blank and the synchronization status remains stuck in a pending state.
Scope FortiSwitch.
Solution

Observing the following symptoms:

  •  The output of the 'diagnose switch-controller mac-cache' command shows no clients.
  • The 'exec switch-controller get-sync-status all' command displays a PENDING sync status.

 

Example output:


diagnose switch-controller mac-cache show
Vdom: root

managed-switch: S124xxxxx95 vfid: 0
running-clients:
VLANID PORTID MAC LAST SEEN(secs ago) INTF-NAME
No client found

managed-switch: S124xxxxxx15 vfid: 0
running-clients:
VLANID PORTID MAC LAST SEEN(secs ago) INTF-NAME
No client found

managed-switch: S448xxxxxx62 vfid: 0
running-clients:
VLANID PORTID MAC LAST SEEN(secs ago) INTF-NAME
No client found

 

Cause:

This issue can occur if the HTTPS protocol is disabled on the switch interface.

 

Resolution:

Ensure that HTTPS is enabled on the internal interface of the switch. FortiGate uses HTTPS to push and synchronize configurations with FortiSwitch. By default, HTTPS is enabled on all switches.

 

If it has been disabled, re-enable it to restore proper functionality.
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