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Enabling OAM Remote Loopback
After enabling OAM remote loopback on a port, you can send loopback frames from the port to a remote
port and then observe how many of these loopback frames are returned. In this way, you can calculate
the packet loss ratio on the link, thus evaluating the link performance.
Follow these steps to enable Ethernet OAM remote loopback:
To do… Use the command… Remarks
Enter system view
System-view
—
Enter Ethernet port view
interface
interface-type
interface-number
—
Enable Ethernet OAM remote
loopback
oam loopback
Required
Disabled by default.
Because enabling Ethernet OAM remote loopback impacts other services, use this function with
caution.
z Ethernet OAM remote loopback is available only after the Ethernet OAM connection is established
and 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 OAM
remote loopback is disabled, all the ports involved will shut down and then come up. Ethernet OAM
remote loopback is disabled when you execute the undo oam enable command to disable
Ethernet OAM, when you execute the undo oam loopback command to disable Ethernet OAM
remote 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 link
aggregation member ports. In addition, you cannot assign ports where Ethernet OAM remote
loopback is being performed to link aggregation groups. For more information about link
aggregation groups, refer to Link Aggregation Operation.
z Enabling internal loopback test on a port in remote loopback test can terminate the remote
loopback test. For more information about loopback test, refer to Port Basic Configuration
Operation
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