---
oid: "1.3.6.1.4.1.637.54.1.25.2.1.4.1.11"
asn1-notation: "{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 637 ltt(54) tsdim(1) opticsimEthMib(25) opticsimEthNEMib(2) opticsimEthNEMibObject(1) opticsIMifMauExtTable(4) opticsIMifMauExtEntry(1) opticsIMifMauExtDirectionMode(11)}"
description: "opticsIMifMauExtDirectionMode OBJECT-TYPE "
last-modified: "2026-06-02"
tags: [oid-repository]
---

## OID: `1.3.6.1.4.1.637.54.1.25.2.1.4.1.11` (last updated: 2026-06-02)

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 637 ltt(54) tsdim(1) opticsimEthMib(25) opticsimEthNEMib(2) opticsimEthNEMibObject(1) opticsIMifMauExtTable(4) opticsIMifMauExtEntry(1) opticsIMifMauExtDirectionMode(11)}
```

### Description

```asn1
opticsIMifMauExtDirectionMode OBJECT-TYPE 
SYNTAX INTEGER {unidirectional(1), bidirectional(2)} 
MAX-ACCESS read-write 
STATUS current 
DESCRIPTION 
"It is used to define the Interface Direction Mode (IEEE 802.3 clause 66) 
of an Ethernet interface with the following values: 
- unidirectional (1) 
When the interface detects an incoming failure (e.g., LOS), 
it keeps transmitting traffic in the outgoing direction 
and also inserts a remote failure indication, 
if such an indication is defined for that type of MAU 
(e.g., an RFI signal), to the remote interface. 
- bidirectional (2) 
When the interface detects an incoming failure (e.g., LOS), 
it stops transmitting traffic in the outgoing direction 
and also inserts a remote failure indication, 
if such an indication is defined for that type of MAU 
(e.g., an RFI signal), to the remote interface."

**Classification**: MIB object for network management

### Child OIDs

No child OID

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**Note to implementers:**: The OID repository is constantly updated but does not necessarily store the latest (or most accurate) version of this formal description. For an implementation, it is recommended to search the web for a more recent description. If this is the case, please update the above description.