Document No. 10-300077, Issue 2 8-47
Configuring Ports
Network Error Detection and Recovery
Overview
Functionality The Network Error Detection and Recovery (NEDR) feature monitors
Ethernet CRC errors on Ethernet data ports and compares the rate of errors
that occurs to the threshold values that you set. This feature helps you find
the source of the errors and take corrective action if necessary.
If the rate of CRC errors equals or exceeds the threshold value, the NEDR
feature can:
■Disable the port
■Log the event in the event log
* Note: The Link LED on the 10-Gigabit module does not indicate a
disabled status. The LED should flash green when you or the
Network Error Detection and Recovery (NEDR) feature disable
the port. However, the LED remains solid green.
If NEDR shuts down a port, the switch will forward traffic through a
redundant port if you:
■Enable a protocol that supports redundancy, such as OSPF, VRRP,
or STP, on the port
■Provide an alternate path
If you do not enable a protocol that supports redundancy on the port and
provide an alternate path, you may lose traffic if the port shuts down.
If you replace a module that has a port that NEDR has disabled, the switch
will load the startup configuration for the module and reenable the port.
However, if you save the running configuration to the startup configuration
while a port is shut down, you will ha ve to manually reenable the port afte r
you replace the module or reset the switch.
To reenable a turned off port, use the set port enable CLI command.