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NOTE
An EFM mode can be configured for an interface after EFM is enabled globally and before EFM is enabled
on the interface. After EFM is enabled on an interface, the EFM mode of the interface cannot be changed.
When using EFM to monitor a link, ensure that either of the interfaces at both ends of the link operates in
active mode.
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An EFM connection can be initiated only by an active EFM entity, and a passive EFM entity waits for
a connection request from its remote EFM entity.
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If two ends of a link are configured to work in active EFM mode, link detection can be implemented.
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If two ends of a link are configured to work in passive EFM mode, link detection cannot be
implemented.
----End
(Optional) Configuring EFM OAMPDU Parameters
Configuring the maximum OAMPDU size, interval at which OAMPDUs are sent, and interval
at which OAMPDUs are received of EFM OAMPDU enables network administrators to
effectively control OAMPDU transmission.
Context
EFM devices exchange OAMPDUs periodically to report the link status. Administrators can set
EFM OAMPDU parameters to effectively manage networks.
EFM OAMPDU parameters include the maximum OAMPDU size, interval at which OAMPDUs
are sent, and interval at which OAMPDUs are received.
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After setting up an EFM connection, two EFM entities exchange OAMPDUs at a specific
interval to check whether the connection is working properly. If an EFM entity does not
receive any OAMPDU from its remote EFM entity within the interval at which OAMPDUs
are received, it considers that the link is not working properly. Network administrators can
configure different intervals at which OAMPDUs are received based on user requirements.
A short interval can be set for high-priority users or services sensitive to link quality. A
long interval can be set for low-priority users or services insensitive to link quality.
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After the maximum OAMPDU size is set on an interface, the interface will discard packets
of which the size is greater than the maximum OAMPDU size. By adjusting the maximum
OAMPDU size, you can enable Huawei devices to communicate with non-Huawei devices.
Perform the following steps on the interfaces at both ends of a link:
Procedure
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Set the maximum EFM OAMPDU size.
1.
Run:
system-view
The system view is displayed.
2.
Run:
interface
interface-type
interface-number
The view of an interface at one end of a link is displayed.
3.
Run:
efm packet max-size
size
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
8 Ethernet OAM Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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