when i configuration Gre Tunnel, it show Erorr there (Error: Stack slot 1 must be removed before GRE tunnels can be configured. Configuration failed on backup Node, command execution aborted!).
As per the license requirements, GRE tunneling requires core license installed. X620 devices can be upgraded from standard Edge license to only the Adv Edge license.
So, we may be hitting the limitation here. Pls refer the screenshots below.
Please refer the link below about the feature license requirements of 21.1.