Huawei Proprietary And Confidential; Associating Efm Oam With An Interface; Establishing The Configuration Task - Huawei Quidway S3700 Series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Reliability
Example
Run the display efm session command on the device with an active interface on the link. If the
EFM OAM protocol on the active interface is in the Loopback (control) state, which indicates
that the active interface initiates remote loopback, the configuration is successful.
<SwitchA> display efm session interface gigabitethernet 0/0/1
Interface
----------------------------------------------------------------------
GigabitEthernet0/0/1
Run the display efm session command on the device with a passive interface on the link. If the
EFM OAM protocol on the passive interface is in the Loopback (be controlled) state, which
indicates that the passive interface responds to remote loopback, it indicates that the
configuration is successful.
<SwitchB> display efm session interface gigabitethernet 0/0/1
Interface
----------------------------------------------------------------------
GigabitEthernet0/0/1
Run the display efm session command on either of the devices on the link. If the EFM OAM
protocol on the interface is in the Detect or Discovery state, the configuration is successful.
<SwitchA> display efm session interface gigabitethernet 0/0/1
Interface
----------------------------------------------------------------------
GigabitEthernet0/0/1

4.6 Associating EFM OAM with an Interface

After EFM OAM is associated with an interface, services may be greatly affected. For example,
all the Layer 2 and Layer 3 services may be blocked.

4.6.1 Establishing the Configuration Task

Before configuring the association between EFM OAM and an interface, familiarize yourself
with the applicable environment, complete the pre-configuration tasks, and obtain the required
data. This can help you complete the configuration task quickly and accurately.
Applicable Environment
As shown in
associated with GE 0/0/1 on Switch A. When the EFM OAM module on Switch A detects a
connectivity fault between Switch A and Switch B, no other packets except EFM protocol
packets can be forwarded on the interface GE 0/0/1 and Layer 2 and Layer 3 services are blocked.
Therefore, the association of EFM OAM and the current interface may greatly affect services.
When the current interface detects the link fault recovery through EFM OAM, all packets can
be forwarded on the interface and Layer 2 and Layer 3 services are unblocked.
Figure 4-3 Diagram of associating EFM OAM with an interface
SwitchA
Issue 01 (2011-10-26)
EFM State
Loopback(control)
EFM State
Loopback(be controlled)
EFM State
detect
Figure 4-3, EFM OAM is enabled on Switch A and Switch B. EFM OAM is
EFM
OAM
GE0/0/1 GE0/0/1
Interface associated with EFM OAM

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Copyright © Huawei Technologies Co., Ltd.
SwitchB
4 Ethernet OAM Configuration
Loopback Timeout
20
Loopback Timeout
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Loopback Timeout
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