Hi,
Thanks for posting in Q&A platform.
May I know when did you encounter this error? When configured the FortiSwitch 248D as a RADIUS client? If you have configured the FortiSwitch 248D as a RADIUS client in the following option first?
Please kindly understand that FortiSwitch 248D is a third party product that we're not familiar with, I would suggest you could contact FortiSwitch support for further troubleshooting.
Best Regards,
Sunny
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