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Understanding Ethernet Service States

 

PSM provides information on the state of an Ethernet service.

Each switch maintains a state for every service configured on the switch. This state (one per service) represents the state of the network connections to the remote MEPs, and does not include the state of the endpoint UNIs. This state behaves as follows:

  • Up - all remote MEPs are Up

  • Down - one or more remote MEPs are Down

  • Unknown - no remote MEPs exist

This state is shown in PSM by hovering over an NE in the Ethernet service topology view.

Additionally, PSM maintains an End-to-End service state, which is an overall state that considers the service states on all switches that have UNIs belonging to this service. The End-to-End service state behaves as follows:

  • Up - all service states for this service are Up

  • Down - all service states for this service are Down

  • Troubled - a mix of service states that are Up and Down

  • Unknown - all service states for this service are Unknown

The End-to-End service state is shown in PSM by hovering over an NE in the Ethernet service tree view. It is also recorded in the Ethernet services report (Generating Ethernet Reports).