Question: In a roaming scenario using MIPv4 with Local Breakout, where is Lawful Interception (LI) at the PDN-GW considered in relation to the S-GW?
Option 1: Optional at both PDN-GW and S-GW for flexibility.
Option 2: Mandatory at the PDN-GW but not applicable to the S-GW due to its lack of Home Agent function.
Option 3: Applicable to the S-GW only, as it handles initial attach procedures.
Option 4: Dependent on the type of PDN connection being activated.
Explanation: In a roaming scenario with Local Breakout using MIPv4, the PDN-GW must support Lawful Interception (LI) to ensure intercept capability in this setup. This is because the S-GW does not have a Home Agent function, making LI at the S-GW not applicable. Thus, LI is mandatory at the PDN-GW for intercept purposes in this specific scenario.