Cisco Cisco Packet Data Interworking Function (PDIF)
SaMOG Local Breakout
▀ Local Breakout - Enhanced
▄ SaMOG Administration Guide, StarOS Release 19
82
AAA Initiated Detach
Figure 19. AAA Initiated Detach Call Flow
Table 21. AAA Initiated Detach Call Flow Descriptions
Step Description
1
AAA sends STa Abort Session Req message to SaMOG.
2-3
SaMOG responds with an STa Abort Session Rsp message to AAA, and "Radius POD" message to WLC.
4
WLC initiates a Radius-Accounting-Stop Request message to SaMOG.
5
SaMOG sends Radius-Accounting-Stop Response message to WLC.
6
If the APN has been locally broken out, the allocated IP address is returned back to the P-GW IP pool. The session and
associated IP-GRE/EoGRE tunnel is cleared.
associated IP-GRE/EoGRE tunnel is cleared.
7-8
If access-type is PMIPv6, SaMOG initiates a BRI message to WLC, and receives a BRA message back.
Limitations, Restrictions, and Dependancies
The following limitations, restrictions, and dependancies apply for the Local Breakout - Enhanced model:
When an LBO session or GTP session is setup to an EPC/3G core, the mobility protocol or local breakout cannot
be changed dynamically during reattach, even if the new authentication indicates the scope for such change. If
the AAA server withdraws permission for the current mobility protocol/LBO, the session will be closed.
the AAA server withdraws permission for the current mobility protocol/LBO, the session will be closed.
In release 16.0, the Local Breakout feature supports 4G (GTPv2) sessions only.
Prepaid support for Local Breakout feature using the AAA interface is limited to session-timeout AVP to control
the session duration for voucher-based users. No additional support will be available on the AAA interface.