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What is "port error-disabled" state and how to recover from it on the EX series Switch



Article ID: KB16158 KB Last Updated: 24 Feb 2010Version: 1.0
The article below describes the events that transition a port into error-disabled state and the recovery options.  Please see JUNOS EX Switch Guide for extensive details if required.

On the EX Switch a port can be transition into error-disabled state due to several reasons such as:
  • Exceeding storm-control limit with “shut down” action (starting 9.6)
  • Violating MAC limit condition with “shut down” action
  • Exceeding MAC-move limit with “shut down” action
Such conditions will effectively disable the port and link will be shut down if configured. In order to recover the port from such state, user can manually:
  • Clear the error using clear ethernet-switching port-error, or
  • Disable the feature on the interface
  • Disabling/re-enabling the affected interface will not clear the error-disabled state

Users can also define a disable-timeout value to automatically clear the error after specified timeout. This is equivalent to manually clearing the port-error.

[edit ethernet-switching-options]
Port-error-disable {
   Disable-timeout <10…3600>
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