Specifications

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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 3 Configuring Catalyst 2955 Switch Alarms
Configuring Catalyst 2955 Switch Alarms
Use the no fcs-threshold interface configuration command to go back to default FCS threshold value.
This example sets the FCS bit error rate for the Fast Ethernet port 0/1 to 10
-10
Switch# configure terminal
Switch(config)# interface fastethernet0/1
Switch(config-if) # fcs-threshold 10
Setting the FCS Error Hysteresis Threshold
The hysteresis setting prevents the toggle of an alarm when the actual bit error rate fluctuates near the
configured bit error rate. Use the alarm facility fcs-hysteresis global configuration command to set the
FCS error hysteresis threshold.
Note The FCS hysteresis threshold is applied to all ports of a Catalyst 2955 switch.
Beginning in privileged EXEC mode, follow these steps to set the FCS error hysteresis threshold for a
switch:
Note The show running config command displays any FCS error hysteresis that is not the default value.
This example sets FCS error hysteresis at 5 percent.
Switch(config) # alarm facility fcs-hysteresis 5
Step 4
end Return to privileged EXEC mode.
Step 5
show fcs-threshold Verify the setting.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
alarm facility fcs-hysteresis
percentage
Set the hysteresis percentage for the switch.
For percentage, the range is 1 to 10. The default value is 10 percent.
Step 3
end Return to privileged EXEC mode.
Step 4
show running config Verify the configuration.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.