Troubleshooting Tip: FortiSwitch connection unstable when dedicated-mgmt is enabled on FortiOS 7.6.5
| Description | This article describes an issue where a FortiGate managing FortiSwitches has dedicated-mgmt enabled and this leads to frequent FortiLink disconnections due to the cw_acd and cw_acd_daemons being frequently terminated by FortiOS. |
| Scope | FortiGate, FortiLink, FortiOS 7.6.5. |
| Solution | After upgrading a FortiGate managing FortiSwitches to 7.6.5, with dedicated-mgmt enabled, it is likely that the FortiLink connection will be unstable and result in the managed FortiSwitches going offline frequently.
This may be related to a known issue with ID 1217779 where the CAPWAP daemons on the FortiGate, cw_acd and cw_acd_helper, are killed frequently (approx. every two minutes) when 'config system dedicated-mgmt' is enabled.
Crash log output similar to the following can be found using the following command:
diagnose debug crashlog read | grep cw_acd
6100: 2025-12-22 16:08:04 the killed daemon is /bin/cw_acd: status=0xd
A permanent fix for this issue is not available at the moment, but is set to be included in FortiOS 7.6.7 and 8.0.0.
Workaround:
config system dedicated-mgmt set status disable end
Technical Tip: FortiGate dedicated-mgmt feature, or out-of-band management |