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Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
link monitor threshold snr
link monitor threshold snr
Use the link monitor threshold snr interface configuration command to establish threshold values for
signal-to-noise ratio (SNR) errors. Use the no form of this command to return to the default setting.
link monitor threshold snr {downstream value | upstream value}
no link monitor threshold snr {downstream value | upstream value}
This command is available only on Catalyst 2950 Long-Reach Ethernet (LRE) switches.
Syntax Description
Defaults The default is 2 dB.
Command Modes Interface configuration
Command History
Usage Guidelines The default theoretical SNR value added to the threshold value is compared to the value in the LRE
chipset.
Examples This example shows how to configure the SNR threshold as 6 dB downstream and 4 dB upstream:
Switch# configure terminal
Switch(config)# interface longreachethernet0/1
Switch(config-if)# link monitor threshold snr downstream 6
Switch(config-if)# link monitor threshold snr upstream 4
Related Commands
downstream value Value of the SNR, measured in decibels (dB), at the remote end of the
link. The range is 0 to 10.
upstream value Value of the SNR, measured in dB, at the local end of the link. The range
is 0 to 10.
Release Modification
12.1(11)YJ This command was introduced.
Command Description
clear controllers lre link monitor Deletes LRE link monitor data.
link monitor Enables the LRE link monitor on a port.
link monitor logging Enables link monitor event logging per port.
link monitor threshold rserr Sets a Reed-Solomon error threshold for the LRE link monitor.
show controllers lre link monitor Displays the LRE link monitor information.
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