[CAUSE] The notification tmnxMcRingOperStateChanged is generated when the operational state of a multi-chassis ring's changes. unknown : none shutdown : none configErr : none noPeer : the peer has no corresponding ring configured; connected : the inband control connection with the peer is operational; broken : the inband control connection with the peer has timed out; localBroken : the inband control connection with the peer is known to be broken because of a local failure or local administrative action; conflict : the inband control connection with the peer has timed out but the physical connection is still OK; the failure of the inband signaling connection is caused by some misconfiguration. E.g. a conflict between the configuration of this system and its peer, or a misconfiguration on one of the ring access node systems. testingRing : the inband control connection with the peer is being set up. Waiting for result. waitingForPeer : verifying if this ring is configured on the peer. [EFFECT] unknown : none shutdown : the ring brings all SAP's of path-a and path-b in operational state 'up'. configErr : if there is no peer ring, the ring brings all SAP's on path-a and path-b in operational state 'up'; if there is a peer ring, the ring brings all SAP's on path-a and path-b in operational state 'down'. noPeer : the ring brings all SAP's of path-a and path-b in operational state 'up'. connected : the ring brings all SAP's of its own path in operational state 'up' and all SAP's of the other path in operational state 'down'. broken : the ring brings all SAP's of path-a and path-b in operational state 'up'. localBroken : this system brings all SAP's of path-a and path-b in operational state 'down' unless they belong to the excluded-path. conflict : the ring brings all SAP's of its own path in operational state 'up' and all SAP's of the other path in operational state 'down'. testingRing : the ring does not change the operational state of any SAP. waitingForPeer: the ring does not change the operational state of any SAP. [RECOVERY] The recovery depends on the operational state of the ring: unknown : none shutdown : no recovery required. configErr : correct the configuration of the ring on this system. noPeer : no recovery required. connected : no recovery required. broken : repair the ring connection with the peer. localBroken : repair the local failure or undo the administrative action that caused the failure. conflict: make the ring configuration on this system consistent with the ring configuration on the peer. testingRing : temporary state. waitingForPeer : temporary state.