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# Bring up interface ATM 3/1/1.
<Sysname> system-view
[Sysname] interface Atm 3/1/1
[Sysname-Atm3/1/1] undo shutdown
# Shut down PVC 1/101.
<Sysname> system-view
[Sysname] interface Atm 3/1/1
[Sysname-Atm3/1/1] pvc aa 1/101
[Sysname-atm-pvc-Atm3/1/1-1/101-aa] shutdown
# Bring up PVC 1/101.
<Sysname> system-view
[Sysname] interface Atm 3/1/1
[Sysname-Atm3/1/1] pvc aa 1/101
[Sysname-atm-pvc-Atm3/1/1-1/101-aa] undo shutdown
threshold
Syntax
threshold { sd | sf } value
undo threshold { sd | sf }
View
ATM main interface view
Default level
2: System level
Parameters
sd: Sets the signal degrade (SD) alarm threshold.
sf: Sets the signal failure (SF) alarm threshold.
value: SD or SF alarm threshold, an integer in the range of 3 to 9.
Description
Use the threshold command to set the SD alarm threshold or SF alarm threshold for the current ATM
interface.
Use the undo threshold command to restore the default.
By default, the SD alarm threshold is 10e-6 and the SF alarm threshold is 10e-3.
SD and SF alarms are used to indicate current line performance. They are generated when the receiving
end detects a certain amount of B2 errors. When a small amount of errors occur, SD alarms are
generated; when the error rate increases to a certain level, SF alarms are generated, indicating line
performance has been degrading seriously, so you must set the SF alarm threshold higher than the SD
alarm threshold.
When setting the thresholds, set the SD threshold lower than the SF threshold.
Examples
# Set the SD alarm threshold to 10e-4 for interface ATM 3/1/1.
<Sysname> system-view
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