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Multi-Service Example
A: A user is Authenticated and Authorized as prepaid and assigned quota to the “Access Service” of 2MB.
B: NAS wants to Authz another Service (eg VoIP). Sends an Access-Request (AuthOnly) with PPAQ specifying SID =Service-A.
Session-Id needed to tie this Authorize-Only to previous AuthN/AuthZ.
C: PPS replies with Access-Accept with a PPAQ for Service-A containing Volume of 1 MB.
D: “Access Service” and Service-A request more quota. Report what they used.
Update-Reason Quota-Refresh
E: PPS authorize more quota to both. Access Service (+2MB) has 4 MB,Service-A (+1MB) 2MB
F: User logs off. Report used quota. “Access-Service” 3MB, Service-A 1.5 MB. We know that it’s the end because the PPAQ indicates the cause for reporting Update-Reason User-Termination.
NAS/PPC
PPS
AuthN/AuthZ “Access Service”
Session-Id, [PPAQ SID=Service-A]
A
B
C
[PPAQ QID Service-A, I MB]
Access-Request Authz Only
Access-Accept Authz Only
D
E
F
Access-Request Authz Only
[PPAQ QID 2 MB] [PPAQ QID Service-A, I MB]
Access-Accept Authz Only
[PPAQ QID 4 MB] [PPAQ QID Service-A, 2 MB]
Access-Request Authz Only
[PPAQ QID 3 MB] [PPAQ QID Service-A, I.5 MB]
Access-Accept Authz Only
PPT Version