The authentication method use to login to the controller. If authentication failure occours, no other method will be used. If access is granted, no other method will be used. Selection with multiple methods will be used in the following maner: tACACSorRADIUSorLocal If TACACS server does not respond, the RADIUS server will be used. If the RADIUS server does not respond then the Local accounts will be used. tACACSorRADIUS If TACACS server does not respond, the RADIUS server will be used. If the RADIUS server does not respond the controller will issue a authentication failure. tACACSorLocal If TACACS server does not respond, then Local accounts will be used. rADIUSorLocal If RADIUS server does not respond, then Local accounts will be used. tACACS Login with TACACS server only. rADIUS Login with RADIUS server only. local Login with Local accounts only. This method list will traverse the methods from TACACS+ to RADIUS, and from RADIUS to the local security account database. Each of these methods, including Local, will have the ability to be disabled, thus allowing a configurable method list of the following iterations: T (TACACS) R (RADIUS) L(LOCAL) TRL, TR, TL, RL, T, R, L. A tech-support GR815 compliant EEP (Challenge Key method) is still accepted for access into the device regardless of the method list configuration (see example of EEP in 61187010L1-5B, Figure 25, p.66).