In Release 21.0 and earlier, for non-UICC devices, SaMOG supported the PMIPv6 protocol over the S2a interface for DHCP and RADIUS Accounting-based sessions.
In Release 21.1 and later, SaMOG supports the PMIPv6 protocol over the S2a interface for RADIUS Authentication triggered sessions also. This ensures that SaMOG can seamlessly handover non-UICC UE sessions that move from access points (AP) of one access type to another.
SaMOG forwards the MN-NAI value received from the AAA Server towards the Cisco WLC in the Access-Accept message. The Cisco WLC can use the same message in the PBU message towards SaMOG. For non-Cisco WLCs, the WLC may initiate a PBU message with the UE's MAC address (in any MAC format separated by '-', '.', ':') in the NAI attribute. SaMOG can then perform session lookup.
Web Authorization - Pre-Authentication Phase
In release 21.0 and earlier, during RADIUS authentication-based session creation, when the AAA server does not send the IMSI information in the Access-Accept message to SaMOG, SaMOG treats the call type as pre-authentication phase.
In release 21.1 and later, SaMOG applies the following logic to determine the call type as pre-authentication or Transparent Auto Logon (TAL) phase:
If the IMSI information is included in the Access-Accept message from the AAA server, the call type will be considered as TAL phase (MN-NAI information can be included or excluded).
If the IMSI information is not present and the MN-NAI information is present in the Acess-Accept message from the AAA server:
SaMOG considers the call type to be TAL phase if the S2a protocol is PMIPv6.
SaMOG considers the call type to be TAL phase, if the session trigger is DHCP or Accounting.
SaMOG considers the call type to be pre-authentication phase if PMIPv6 is not the S2a protocol.
If both IMSI and MN-NAI information is not present in the Access-Accept message from the AAA server, the call type will be considered as pre-authentication phase.
The following licenses are required for this feature:
SaMOG General license (3G and 4G)
SaMOG Local Breakout - Enhanced license to configure a local P-GW
SaMOG Web Authorization license
Contact your Cisco account representative for detailed information on specific licensing requirements.