Cisco Asr 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide - Cisco ASR 9000 Series Configuration Manual

Creating Attributes of Specific Format
An example of constructing the NAS-Port-ID from just the Circuit-ID is:
aaa attribute format NAS-PORT-ID-FORMAT3 format-string "%s" circuit-id-tag
The NAS-Port-ID formats configured in the above examples, can be specified in the nas-port-ID command,
thus:
For IPoEoQINQ interface:-
aaa radius attribute
For Virtual IPoEoQINQ interface:-
aaa radius attribute
For IPOEoE interface:-
aaa radius attribute
NAS-Port-Type on Interface or VLAN Sub-interface
In order to have different production models for subscribers on the same BNG router, but different physical
interfaces of same type, the NAS-Port-Type is made configurable for each physical interface, or VLAN
sub-interface. With a different NAS-Port-Type value configured on the interface, the NAS-Port and
NAS-Port-ID gets formatted according to the formats defined globally for the new NAS-Port-Type configured
on the interface, instead of the actual value of NAS-Port-Type that the interface has. This in turn sends different
formats of NAS-Port, NAS-Port-ID and NAS-Port-Type to the RADIUS server for the subscribers under
different production models.
In the case of sub-interfaces, the hierarchy to be followed in deciding the format of NAS-Port-Type to be sent
to the RADIUS server is:
1 Verify whether the NAS-Port-Type is configured on the sub-interface in which the subscriber session
arrives.
2 If NAS-Port-Type is not configured on the sub-interface, verify whether it is configured on the main
physical interface.
The format of NAS-Port or NAS-Port-ID is based on the NAS-Port-Type retrieved in
3 If NAS-Port-Type is configured on neither the sub-interface nor the main physical interface, the format
of NAS-Port or NAS-Port-ID is based on the format of the default NAS-Port-Type of the sub-interface.
4 If a NAS-Port or NAS-Port-ID format is not configured for the NAS-Port-Type retrieved in steps 1, 2 or
3, the format of NAS-Port or NAS-Port-ID is based on the default formats of NAS-Port or NAS-Port-ID.
Use this command to configure NAS-Port-Type per interface or VLAN sub-interface:
aaa radius attribute nas-port-type <nas-port-type>
where:
<nas-port-type> is either a number ranging from 0 to 44, or a string specifying the nas-port-type.
Refer Configuring RADIUS Attribute Nas-port-type, on page
Calling-Station-ID and Called-Station-ID
BNG supports the use of configurable calling-station-ID and called-station-ID. The calling-station-ID is a
RADIUS attribute that uses Automatic Number Identification (ANI), or similar technology. It allows the
network access server (NAS) to send to the Access-Request packet, the phone number from which the call
came from. The called-station-ID is a RADIUS attribute that uses Dialed Number Identification (DNIS), or
similar technology. It allows the NAS to send to the Access-Request packet, the phone number that the user
called from.

Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Configuration Guide,

Release 4.3.x
34
Configuring Authentication, Authorization, and Accounting Functions
nas-port-id format NAS-PORT-ID-FORMAT1
nas-port-id format NAS-PORT-ID-FORMAT2 type 44
nas-port-id format NAS-PORT-ID-FORMAT3 type 39
type 41
Step 1
40.
or Step 2.
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