Description: The Primary Packet-handling Mode of the Portal Services logical element (PS) of a CableHome compliant residential gateway device. This object configures operation of the PS packet handling functions.

When the value of this object is napt(1), the PS is required to support the Network Address and Port Translation (NAPT) process in accordance with the NAPT requirements defined in IETF RFC 3022. When operating in NAPT Primary Packet Handling Mode, the PS supports the translation of multiple LAN-Trans IP addresses and their TCP/UDP ports into a single WAN-Data IP address and its TCP/UDP ports.

When the value of this object is nat(2), the PS is required to support the Network Address Translation (NAT) process in accordance with the NAT equirements defined in IETF RFC 3022. When operating in NAT Primary Packet Handling Mode, the PS supports the translation of multiple LAN-Trans IP addresses into the same number of unique WAN-Data IP addresses.

When the value of this object is passthrough(3), the PS is required to act as a transparent bridge in accordance with IEEE 802.1D. When operating in Passthrough Primary Packet Handling Mode, the PS does not translate network addresses, and bridges all traffic between its LAN and WAN interfaces.

The PS MUST delete dynamically-created row entries from the cabhCapMappingTable, i.e. those with cabhCapMappingMethod = dynamic(2), when the value of cabhCapPrimaryMode changes. The PS MUST NOT delete statically-created row entries from the cabhCapMappingTable where cabhCapMappingMethod = static(1), when the value of cabhCapPrimaryMode changes.