Question: In PMIPv6, when a Mobility Access Gateway (MAG) initiates an IPv4 Address Release using DHCPv4, what is the required setting for the IPv4 home address in the Proxy Binding Update (PBU)?
Option 1: The IPv4 home address to be released is set in the Vendor-Specific Option of the PBU.
Option 2: The IPv4 home address to be released is set in the IPv4 Home Address Request option of the PBU.
Option 3: The IPv4 home address to be released is inferred from the Care-of Address (CoA) in the PBU.
Option 4: No specific setting for the IPv4 home address is required in the PBU for this procedure.
Explanation: According to PMIPv6 specifications, when a MAG initiates an IPv4 Address Release using DHCPv4, it must explicitly specify the IPv4 home address to be released by setting it in the IPv4 Home Address Request option within the PBU, ensuring accurate identification and release of the correct IP address.