---
oid: "1.3.6.1.4.1.4491.2.4.3.1.1.4"
asn1-notation: "{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 4491 clabProject(2) clabProjCableHome(4) cabhCapMib(3) cabhCapObjects(1) cabhCapBase(1) cabhCapPrimaryMode(4)}"
description: "cabhCapPrimaryMode OBJECT-TYPE"
classification: "MIB object for network management"
last-modified: "2020-02-07"
---

## OID : `1.3.6.1.4.1.4491.2.4.3.1.1.4`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 4491 clabProject(2) clabProjCableHome(4) cabhCapMib(3) cabhCapObjects(1) cabhCapBase(1) cabhCapPrimaryMode(4)}
```

### Description

```asn1
cabhCapPrimaryMode OBJECT-TYPE
SYNTAX INTEGER {
napt(1), \-- NAT with Port Translation Mode
nat(2), \-- Traditional NAT Mode
passthrough(3) \-- Passthrough/Bridging Mode
}
MAX-ACCESS read-write
STATUS current
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."
REFERENCE
"CableHome 1.1 Specification, Packet Handling & Address
Translation section."
DEFVAL { napt }
```

**Classification**: MIB object for network management

### Supplementary information

Automatically extracted from [Rec. ITU-T J.192](http://itu.int/ITU-T/J.192).

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