undo oam errored-symbol threshold 
View 
System view 
Default level 
2: System level 
Parameters 
threshold-value: Errored symbol event triggering threshold, ranging from 0 to 4,294,967,295. 
Description 
Use the oam errored-symbol threshold command to set the errored symbol event triggering threshold. 
Use the undo oam errored-symbol threshold command to restore the default. 
By default, the errored symbol event triggering threshold is 1. 
Related commands: oam  errored-symbol period,  display oam link-event, and display oam 
configuration. 
Examples 
# Set the errored symbol event triggering threshold to 100. 
<Sysname> system-view 
[Sysname] oam errored-symbol threshold 100 
oam loopback 
Syntax 
oam loopback 
undo oam loopback 
View 
Ethernet port view 
Default level 
2: System level 
Parameters 
None 
Description 
Use the oam loopback command to enable Ethernet OAM remote loopback on the Ethernet port. 
Use the undo oam loopback command to disable Ethernet OAM remote loopback on the Ethernet port. 
By default, Ethernet OAM remote loopback is disabled on an Ethernet port. 
Ethernet OAM remote loopback is available only after the Ethernet OAM connection is established and 
can be performed only by the Ethernet OAM entities operating in active Ethernet OAM mode. 
Related commands: oam enable, oam enable interface, and oam mode. 
Examples 
# Configure the active Ethernet OAM mode, enable Ethernet OAM, and enable Ethernet OAM remote 
loopback on Ethernet 1/0/1. 
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