http://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r4-3/security/configuration/guide/b_syssec_cg43xasr9k/b_syssec_cg43asr9k_chapter_010.html#con_1185183My TACACS server does not support the custom parameters needed to get TACACS auth...