5-9z Ethernet OAM remote loopback is available only after the Ethernet OAM connection is establishedand can be performed only by the Ethernet OAM entities operating in active Ethernet OAM mode.z Remote loopback is available only on full-duplex links that support remote loopback at both ends.z Ethernet OAM remote loopback needs the support of the peer hardware.z Enabling Ethernet OAM remote loopback interrupts data communications. After Ethernet OAMremote loopback is disabled, all the ports involved will shut down and then come up. EthernetOAM remote loopback is disabled when you execute the undo oam enable command to disableEthernet OAM, when you execute the undo oam loopback command to disable Ethernet OAMremote loopback, or when the Ethernet OAM connection times out.z Ethernet OAM remote loopback is only applicable to individual links. It is not applicable to linkaggregation member ports. In addition, you cannot assign ports where Ethernet OAM remoteloopback is being performed to link aggregation groups. For more information about linkaggregation groups, refer to Link Aggregation Configuration in the Access Volume.z Enabling internal loopback test on a port in remote loopback test can terminate the remoteloopback test. For more information about loopback test, refer to Ethernet Interface Configurationin the Access Volume.Displaying and Maintaining Ethernet OAM ConfigurationTo do… Use the command… RemarksDisplay global Ethernet OAM configuration display oam configurationDisplay the statistics on critical eventsafter an Ethernet OAM connection isestablisheddisplay oam critical-event [ interfaceinterface-type interface-number ]Display the statistics on Ethernet OAM linkerror events after an Ethernet OAMconnection is established or after youclear the statisticsdisplay oam link-event { local |remote } [ interface interface-typeinterface-number ]Display the information about an EthernetOAM connectiondisplay oam { local | remote }[ interface interface-typeinterface-number ]Availablein anyviewClear statistics on Ethernet OAM packetsand Ethernet OAM link error eventsreset oam [ interface interface-typeinterface-number ]Availablein userview onlyEthernet OAM Configuration ExampleNetwork requirementsz Enable Ethernet OAM on Device A and Device B to auto-detect link errors between the twodevices.z Monitor the performance of the link between Device A and Device B by collecting statistics aboutthe error frames received by Device A..
