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Example: Viewing Ethernet Ring Protection Status—Ring Failure Condition

 

This section assumes that Ethernet ring protection is configuring correctly, that Router 1 is the ring protection link (RPL) owner, and that there is a link failure between Router 2 and Router 3 in the configuration example.

Router 1 Operational Commands (Ring Failure Condition)

user@router1> show protection-group ethernet-ring aps

Note that the ring protection link is no longer blocked and the node is no longer marked as originator.

user@router1> show protection-group ethernet-ring interface

Note that the protection interface is now forwarding (so is the other interface).

user@router1> show protection-group ethernet-ring node-state

Note that Router 1 has recorded the span failure (SF).

user@router1> show protection-group ethernet-ring statistics group-name pg101

Note that the R-APS messages have recorded the remote failure.

Under a failure condition, the other routers on the ring (Router 2 and Router 3) will see the following similar output:

Router 2 and Router 3 Operational Commands (Failure Condition)

user@router2> show protection-group ethernet-ring aps

Note the failure event (SF). Router 3 will see almost identical information.

user@router2> show protection-group ethernet-ring interface

Note that the failed interface (ge-1/0/2.1) is not forwarding. Router 3 will see almost identical information.

user@router2> show protection-group ethernet-ring node-state

Note that Router 2 is not the owner. Router 3 will see almost identical information.

user@router2> show protection-group ethernet-ring statistics group-name pg102

Note that the R-APS messages have recorded the remote failure. Router 3 will see almost identical information.