NSP-ID and NAP-ID Functionality ▀
Cisco ASR 5000 Series Product Overview ▄
If a NAP that has direct connection to the home NSP is not found, the MS attempts to select a NAP that has connection
to one of the NSPs in the Preferred NSPs list. The order that the MS follows for selection from the NSP Enumeration
List is determined by the ―User Controlled CAPL‖ and ―Operator Controlled CAPL‖, if available in the configuration
information.The MS selects and tries to authenticate with an available and allowable NSP, in the following precedence:
Home NSP,
If the ―User Controlled RAPL‖ is available, NSPs in the ―User Controlled RAPL‖ in the MS (in priority order),
If the ―Operator Controlled RAPL‖ is available, NSPs in the ―Operator Controlled RAPL‖ in the MS (in priority
order),
Any other NSP in random order.
Upon selection and successful authentication to the selected NSP, the MS indicates the selected NSP. If no NSP is
found, the MS behavior is implementation dependent.
ASN GW and NAP-ID/NSP-ID Process
Following is an overview of NAP-ID and NSP-ID process from the ASN GW‘s perspective:
1. NAP/NSP advertisement: BS advertises the available NAP/NSP to MS. The MS chooses one of the preferred
NAP/NSPs and performs INE with that NAP/NSP. The BS/MS supports this function; the ASN GW does not
play a role.
2. Once the MS selects an NSP, the MS performs INE with the selected NSP to authenticate the MS at the selected
NSP. The ASN GW enables the MS to get service from that NSP. In short, the ASN GW routes the
Authentication request to the right AAA server, based on the NAI.
3. The NSP-ID is included in the access request from the ASN GW.
4. The WiMAX HA/ASNGW, whichever is generating the accounting records, adds the NSP-ID and NAP-ID
attribute to the accounting request.
5. The ASN GW and HA sends the NSPID in authentication and accounting procedures to AAA server. The
ASNGW does not send NAPID in authentication and accounting procedures to the AAA server, since the
ASNGW sends the BSID to the AAA server.
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