By default, the operational state of the Epipe is tied to the state of the two connections that comprise the Epipe. If either of the connections in the Epipe are operationally down, the Epipe service that contains that connection is also operationally down. The operator can configure a single SAP within an Epipe that does not affect the operational state of that Epipe, using the optional ignore-oper-state command. Within an Epipe, if a SAP that includes this optional command becomes operationally down, the operational state of the Epipe does not transition to down. The operational state of the Epipe remains up. This does not change that the SAP is down and no traffic can transit an operationally down SAP. Removing and adding this command on the fly evaluates the operational state of the service, based on the SAPs and the addition or deletion of this command.
Service OAM (SOAM) designers may consider using this command if an operationally up MEP configured on the operationally down SAP within an Epipe is required to receive and process SOAM PDUs. When a service is operationally down, this is not possible. For SOAM PDUs to continue to arrive on an operationally up, MEP configured on the failed SAP, the service must be operationally up. Consider the case where an operationally up MEP is placed on a UNI-N or E-NNI and the UNI-C on E-NNI peer is shutdown in such a way that it causes the SAP to become operationally down.
Two connections must be configured within the Epipe; otherwise, the service is operationally down regardless of this command. The ignore-oper-state functionality only operates as intended when the Epipe has one ingress and one egress. This command is not to be used for Epipe services with redundant connections that provide alternate forwarding in case of failure, even though the CLI does not prevent this configuration.
Support is available on Ethernet SAPs configured on ports or Ethernet SAPs configured on LAG. However, it is not allowed on SAPs using LAG profiles or if the SAP is configured on a LAG that has no ports.