efm packet max-size

Function

The efm packet max-size command sets the maximum size for an EFM OAM PDU.

The undo efm packet max-size command restores the default setting.

By default, the maximum size of an EFM OAM PDU is 128 bytes.

Format

efm packet max-size size

undo efm packet max-size

Parameters

Parameter	Description	Value
size	Specifies the maximum size for an OAM PDU. The size includes the Layer 2 frame header length and CRC field length.	The value is an integer ranging from 64 to 1518, in bytes.

Parameter

Description

Value

size

Specifies the maximum size for an OAM PDU. The size includes the Layer 2 frame header length and CRC field length.

The value is an integer ranging from 64 to 1518, in bytes.

Views

Layer 2 100GE interface view, 100GE interface view, Layer 2 10GE interface view, 10GE interface view, 25GE-L2 view, 25GE interface view, 400GE-L2 view, 400GE interface view, Layer 2 40GE interface view, 40GE interface view, Layer 2 50GE interface view, 50GE interface view, FlexE interface view, Layer 2 GE interface view, GE optical interface view, GE interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
efm	write

Usage Guidelines

Usage Scenario

When a Huawei device communicates with a non-Huawei device, you can set the maximum size for an EFM OAM PDU to ensure successful EFM OAM session negotiation.

Prerequisites

EFM OAM has been globally enabled using the efm enable command in the system view.

Configuration Impact

When the size of a received EFM OAM PDU is greater than the configured maximum size, the OAM PDU is discarded as an invalid packet.

Precautions

After the maximum size is set for an EFM OAM PDU, the actual maximum size of an EFM OAM PDU is negotiated by devices on two ends. If different values are set for the two devices, the smaller value is taken as the actual maximum size of an EFM OAM PDU.

Example

# Set the maximum size to 120 bytes for an EFM OAM PDU on GE 0/1/0.

<HUAWEI> system-view
[~HUAWEI] efm enable
[*HUAWEI] interface GigabitEthernet0/1/0
[*HUAWEI-GigabitEthernet0/1/0] efm packet max-size 120