Cisco Cisco Packet Data Gateway (PDG)
SaMOG Gateway Overview
Features and Functionality - License Enhanced Feature Software ▀
SaMOG Administration Guide, StarOS Release 16 ▄
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AAA Initiated Detach
Figure 6. AAA Initiated Detach Call Flow
Table 7. 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 and Dependancies
The following limitations and dependancies apply for the Local Breakout feature:
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 this release, the Local Breakout feature supports 4G (GTPv2) sessions only.