The search order of this TACACS+ host within all configured
TACACS+ hosts. This MIB object indicates the order in which a
TACACS+ request will be sent to the TACACS+ hosts until a response
is received. The primary host is always the first host to be
contacted. The remaining hosts will be contacted in the order
that they were created. Should the primary host be deleted,
the next host in the search order will become the primary host.