1. PaC State Machine States
OFFLINE.
PaC starts PAA discovery (DISC)
PAA sends PANA-Start-Request (WAIT_PAA).
DISC.
WAIT_PAA.
PAA sends a new request (WAIT_PAA).
PAA sends PANA-Bind-Request, Succesful (OPEN).
PAA sends PANA-Bind-Request, Failure (OFFLÌNE).
PAA sends PANA-Bind-Request, 2nd EAP (2ND_EAP).
2ND_EAP.
When both ISP and NAP authentications occur, this is transformation state to the next EAP authentication. PAA sends PANA-Auth-Request (WAIT_PAA).
OPEN.
PAA requests PANA level re-auth (OPEN).
PaC requests PANA level re-auth (WAIT_REAUTH_ANS).
PaC or PAA requests EAP leve re-auth (WAIT_PAA).
PaC terminating session (SESS_TERM).
PAA terminates the session or session timeout (OFFLINE).
WAIT_REAUTH_ANS.
PaC requests PANA level re-auth. PAA responds (OPEN).
SESS_TERM
PAA responds with PANA-Termination-Answer or timeout (OFFLINE).

3. PAA State Machine States
OFFLINE.
PaC/EP sends PANA-PAA-Discover (OFFLINE).
PaC sends PANA-Start-Answer, new session (WAIT_AUTH_ANS).
PaC sends PANA-Start-Answer, session resumption (WAIT_REAUTH_ANS).
WAIT_AUTH_ANS (”WAIT_PaC”).
PaC sends PANA-Auth-Answer (WAIT_EAP).
WAIT_REAUTH_ANS.
PaC sends PANA-Reauth-Answer, Success (OPEN).
Timeout or PANA-Reauth-Answer, Failure (OFFLINE).
WAIT_EAP.
(All) EAP authentication(s) failed (AUTH_FAILED).
1st or 2nd EAP was succesfull (WAIT_SUCC_BIND_ANS).
AUTH_FAILED.
PANA-Bind-Answer from PaC or timeout (OFFLINE).
WAIT_SUCC_BIND_ANS.
PANA-Bind-Answer (successful) from PaC (OPEN).
PANA-Bind-Answer (successful) from PaC, 2nd EAP round (WAIT_AUTH_ANS).
OPEN.
PaC requests PANA level re-auth (OPEN).
Session termination or timeout (SESS_TERM).
PaC sends PANA-Termination-Request (OFFLINE).
PaC requests EAP level re-auth (WAIT_AUTH_ANS).
PAA initiates PANA level re-auth (WAIT_REAUHT_ANS).
SESS_TERM.
PANA-Termination-Answer or timeout (OFFLINE).