Allied Telesis AT-S63 - Manual (Page 833)

AT-S63 Management Software Menus Interface User’s Guide
Section VIII: Management Security 833
When a switch receives a username and password combination from a
network manager, it sends the combination to the first authentication
server in its list. If the server fails to respond, the switch sends the
combination to the next server in the list, and so on.
Note
If no authentication server responds or if no servers have been
defined, the AT-S63 management software defaults to the standard
manager and operator accounts.
Note
For more information on TACACS+, refer to the RFC 1492 standard.
For more information on RADIUS, refer to the RFC 2865 standard.