Service Interim Accounting Overview

Interim accounting determines how often accounting information is updated and sent to an accounting server. In addition to the user-based interim accounting supported on the router, Service Manager supports service-related interim accounting—you can configure an interim accounting interval for services that are created during a user RADIUS-based login and services that are activated by a COA operation.

The service interim accounting interval is specified by the RADIUS Service-Interim-Acct-Interval attribute (VSA 26-140) that is included in the RADIUS Access-Accept message or COA-Request message that activates a service session. Because the Service-Interim-Acct-Interval attribute is a tagged attribute, you can configure different interim accounting intervals for a particular user’s various services.

You can use the aaa service accounting interval command to specify the default service interim accounting interval. Service Manager uses this interval value for service accounting when the Service-Interim-Acct-Interval attribute is not configured.

Note: You can also configure interim accounting for users. A user interim accounting interval is configured in the Acct-Interim-Interval RADIUS attribute (RADIUS attribute 85). You use the aaa user accounting interval command to specify the default user interim accounting interval, which is used when RADIUS attribute 85 is not configured. See the Configuring Remote Access chapter in this guide for information about configuring user interim accounting.

When the Service-Interim-Acct-Interval attribute is configured for a service, Service Manager uses the guidelines shown in Table 159 to determine the correct interim accounting interval to use for the service.

Table 159: Determining the Service Interim Accounting Interval

Service-Interim-Acct-
Interval Value

Service Manager Action

0

Disables interim accounting for the service

1–599

Uses 600

600–86400

Uses the specified value

86401 or greater

Uses 86400

The tag for the service-interim-acct-
interval attribute does not match the tag for any service-activate attribute (VSA 26-65)

Discards the service-interim-acct-interval attribute

Table 160 describes a sample Acct-Start message for a service session. In the table, the three fields used by Service Manager are shown in bold characters. An Acct-Start message for a subscriber session without any active services does not include the Service-Session attribute.

Table 160: Sample Acct-Start Message for a Service Session

RADIUS Attribute

Sample Value

acct-status-type

1

username

client1@isp1.com

event-timestamp

1112191723

acct-delay-time

0

nas-identifier

ERX-01-00-06

acct-session-id

erx FastEthernet 12/0:0001048580:002478

nas-ip-address

10.6.128.45

class

(binary data)

framed-protocol

0

framed-compression

0

framed-ip-address

100.20.0.1

framed-ip-netmask

0.0.0.0

ingress-policy-name (vsa)

forwardAll

egress-policy-name (vsa)

forwardAll

calling-station-id

#ERX-01-00-06#E12#0

acct-input-gigawords

0

acct-input-octets

4032

acct-output-gigawords

0

acct-output-octets

2163

acct-input-gigapackets (vsa)

0

acct-input-packets

7

acct-output-gigapackets (vsa)

0

acct-output-packets

7

nas-port-type

15

nas-port

3221225472

nas-port-id

FastEthernet 12/0

acct-authentic

1

acct-session-time

0

acct-service-session

tiered(1280000, 5120000)

service-interim-acct-interval

1200

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