Chapter 6 Prepaid Billing Solution

Generic Call Flow

Access-Accept (Authentication)

Flow 2b shows the billing server returning the authentication result. The billing server returns a failure if the prepaid subscriber has an inadequate balance.

Flow 2s shows the Cisco AR 3.5 server sending the Access-Accept to the AAA client. This message flow contains at least one prepaid billing-specific VSA (listed in Table 6-3) and may contain other access technology-specific attributes.

Table 6-3 Attributes Sent to AAA client in Access-Accept (Authentication)

Attribute

 

 

 

Number

Attribute Name

Description

Notes

 

 

 

 

26, 9

CRB__USER_TYPE

Refer to Vendor-Specific

Optional

 

CRB_AR_INIT_AUTHENTICATE

Attributes, page 6-10

 

 

 

 

 

Access-Request (Authorization)

In Flow 3c, the AAA client sends another Access-Request, this time to authorize the subscriber. Table 6-4lists the attributes required by the Cisco AR 3.5 server to authorize the subscriber. The session key ID used must be specified using a prepaid VSA pointing to the RADIUS attribute (standard or VSA).

Table 6-4 Attributes Sent During Subscriber Authorization

Attribute

 

 

 

Number

Attribute Name

Description

Notes

 

 

 

 

1

User-Name

APPL: Mobile Node

Required

 

 

Username

 

 

 

 

 

2

NAS IP Address

Accounting Node IP Address

APPL: Required, POA

 

 

 

 

31

Calling-station-ID

APPL:MSISDN or IMSI

APPL: Conditional

 

 

 

 

26, 9

CRB_AUTH_REASON

Refer to Vendor-Specific

Required

 

CRB_AR_INIT_AUTHORIZE

Attributes, page 6-10

 

 

 

 

 

26, 9

CRB_USER_ID

APPL:PDSN address or SSG

APPL: Required,

 

 

address

Address of the PDSN

 

 

 

 

26, 9

CRB_SERVICE_ID

APPL: Service ID such as

 

 

 

Simple IP service, Mobile IP

 

 

 

service, or VPN service

 

 

 

 

 

26, 9

CRB_SESSION_ID

This VSA contains the

Required; the session

 

 

session key ID information

ID must be globally

 

 

 

unique across all clients

 

 

 

and across reboots of

 

 

 

the client

 

 

 

 

.In Flow 3s, the Cisco AR 3.5 server sends the Prepaid billing server to obtain a quota. The quota might contain several values depending on the number of measurement parameters chosen.

Access-Accept (Authorization)

Flow 4b shows the billing server returning the quota array for the subscriber.

Cisco Access Registrar 3.5 Concepts and Reference Guide

6-6

OL-2683-02

 

 

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Cisco Systems 3.5 manual Access-Accept Authentication, Access-Request Authorization, Access-Accept Authorization

3.5 specifications

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