Panasonic GA-ML Series Manual page 328

In the section of TACACS+Settings on Group Servers, you can
configure the following parameter.
Parameter
IPv4 TACACS+Source
Interface Name
Click Apply to add a new entry.
Click Delete to delete the entry specified.
Click Back to return to the previous window.
9.6.3 TACACS+Group Servers Settings
Enter the name of an IPv4 TACACS+source interface.
Overview
9 Security
326