Indicates whether TACACS+ or RADIUS is the
primary enable authentication, i.e which method
will be tried first for a telnet session. If
tacacsEnableAuthentication and
radiusEnableAuthentication are set to disabled
then sysTelnetPrimaryEnableAuthentication will
have a value of local(3).
This object is deprecated and replaced by
cacPriorityTable in CISCO-AAA-CLIENT-MIB.