Question: What is the expected network response when a Mobile Station (MS) initiates a Secondary PDP Context Activation Procedure for an already active LIPA PDN connection or SIPTO at the local network PDN connection?
Option 1: The network sends an ACTIVATE SECONDARY PDP CONTEXT ACCEPT message.
Option 2: The network sends an ACTIVATE SECONDARY PDP CONTEXT REJECT message with cause code #26 "insufficient resources".
Option 3: The network sends an ACTIVATE SECONDARY PDP CONTEXT REJECT message with cause code #60 "bearer handling not supported".
Option 4: The network sends a DEACTIVATE PDP CONTEXT REQUEST message.
Explanation: According to the specification, if the ACTIVATE SECONDARY PDP CONTEXT REQUEST message is related to an already active LIPA PDN connection or SIPTO at the local network PDN connection, then the network shall reply with an ACTIVATE SECONDARY PDP CONTEXT REJECT message with cause code #60 "bearer handling not supported". This indicates that the network does not support bearer handling for this type of connection.