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Cisco Access Registrar 3.5 Concepts and Reference Guide
OL-2683-02
Chapter 6 Prepaid Billing Solution
Generic Call Flow
Access-Request (Quota Depleted)
Flow 7c shows the client sending an Access-Request to the Cisco AR 3.5 server because at least one
quota has been depleted. The Access-Request includes different measurements of how much of the
quotas were used in VSA format. This enables the billing server to account for the usage and manage
the subscriber’s balance before assigning a new quota. Table 6-7 lists the attributes returned to the Cisco
AR 3.5 server:
Accept-Accept (Quota Depleted)
Flow 7s shows the Cisco AR 3.5 server returning the used quota array to the billing server. The call
includes aaa_ebs_reauthoriz(). The billing server sends an updated quota array for the next period to
the Cisco AR 3.5 server.
In Flow 8s, the Cisco AR 3.5 server converts the quota array into VSAs and sends them to the AAA
client.
Table 6-7 Attributes Sent by NAS When Quota Depleted
Attribute
Number Attribute Name Description Notes
1 User-Name APPL: Mobile Node
Username
Conditional
2 NAS IP Address Accounting Node IP
Address
APPL: Required, POA
address, or Home Node
address
31 Calling-station-ID APPL:MSISDN or IMSI APPL: Conditional
26, 9 CRB_AUTH_REASON Refer to VSA Required
26, 9 CRB_USER_ID APPL: PDSN address or
SSG address
APPL: Required,
address of SGSN
26, 9 CRB_DURATION Refer to Vendor-Specific
Attributes, page 6-10
Required
26, 9 CRB_TOTAL_VOLUME Conditional
26, 9 CRB_UPLINK_VOLUME
26, 9 CRB_DOWNLINK_VOLUME
26, 9 CRB_TOTAL_PACKETS
26, 9 CRB_UPLINK_PACKETS
26, 9 CRB_DOWNLINK_PACKETS
Table 6-8 Attributes Sent to AAA Client in Access-Accept (Reauthorization)
Attribute
Number Attribute Name
26, 9 CRB_USER_TYPE
26, 9 CRB_DURATION
26, 9 CRB_TOTAL_VOLUME
26, 9 CRB_UPLINK_VOLUME