Optional) Setting The Faulty-State Hold Timer - Huawei Quidway S6700 series Configuration Manual

Quidway S6700 Series Ethernet Switches
Configuration Guide - Reliability
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4.6.3 (Optional) Setting the Faulty-State Hold Timer

By setting the EFM OAM faulty-state hold timer on physical interfaces, you can prevent
interfaces from alternating between the Up and Down states frequently when links are unstable.
Context
Do as follows on the device at one end or devices at both ends of a link:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Issue 01 (2011-07-15)
When EFM OAM is associated with the current interface and detects a link fault on
the current interface, no other packets except EFM protocol packets can be forwarded
on the interface and Layer 2 and Layer 3 services are blocked. Therefore, the
association between EFM OAM and an interface may greatly affect services. When
EFM OAM on an interface detects link fault recovery, all packets can be forwarded
on the interface and Layer 2 and Layer 3 services are unblocked.
Before configuring the association between EFM OAM and an interface, ensure that
the EFM OAM protocol on both ends of the link is in the detect state.
If Layer 2 and Layer 3 services are blocked due to a misoperation, you can run the
undo efm trigger if-down command in the interface view to restore services.
Associate an error event with an interface and set the interface to the disabled state when
the error event occurs.
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 the link is displayed.
3. Run:
efm { critical-event | dying-gasp | link-fault | timeout } trigger error-
down
An error event is associated with the interface.
By default, an error event is not associated with an interface.
After the efm trigger error-downcommand is used to associate an error event with
an interface, protocol status of the interface goes Down and all services on the interface
are interrupted when EFM OAM detects faults specified by critical-event, dying-
gasp, link-fault, or timeout. Even if EFM OAM on the interface detects link fault
recovery , protocol status of the interface do not change. Traffic can be switched back
only after you have manually detected link quality.
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