Customer lost below command on S7700 for HWTACACS which makes the connection session between S7700 and ACS server is failed.
hwtacacs-server source-ip Y.Y.Y.Y
For HWTACACS/Radius issue,Please follow below ways to check.
1.Before the troubleshooting, need to get the username format to confirm if it contains domain name.
2.Please make sure the access user is authenticated in correct domain. By default, there are two domains.
domain default is used for NAC acccess user. Domain default_admin is used for administrator user.
3.If above configuration is correct,need customer to check the setting on ACS server.
For some special user like ftp, there is some special setting on ACS server.