Alarms Configuration Guide, Cisco Catalyst IE9300 Rugged Series Switches

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Alarms Configuration Guide, Cisco Catalyst IE9300 Rugged Series Switches

FCS bit error rate threshold

Updated: June 16, 2026

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Describes how adjusting FCS bit error rate thresholds enhances network reliability and stability.

You can set up the Frame Check Sequence (FCS) bit error rate threshold and establish the error threshold on your switch.

By adjusting the error threshold and hysteresis threshold, you can enhance the reliability of your network, reduce false alarms during fluctuations in error rates and improve overall network stability.

Set the FCS bit error rate threshold

Follow this procedure to configure the acceptable error rate for frames transmitted over a network interface.

The switch activates a FCS bit error-rate alarm when the measured error rate approaches the configured threshold.

FCS errors indicate frames with corrupted data. Setting a threshold helps monitor network health by notifying you when error rates exceed approved limits.

Procedure

1.

Use the configure terminal command to enter global configuration mode.

Example:

Switch# configure terminal
2.

Use the interface interface-id command to access the interface configuration.

Example:

Switch(config)# interface gig1/0/1
3.

Use the fcs-threshold value command to attach the specified alarm profile to the interface.

Example:

Switch(config-if)# fcs-threshold value
4.

Use the end command to exit to privileged EXEC mode.

Example:

Switch(config-if)# end
5.

Use the show fcs-threshold command to confirm the setting.

Example:

Switch# show fcs-threshold