Restrictions and guidelines for enabling Ethernet OAM remote loopback
Ethernet OAM remote loopback is available only after the Ethernet OAM connection is established. It can be performed only by Ethernet OAM entities operating in active Ethernet OAM mode.
Remote loopback is available only on full-duplex links that support remote loopback at both ends.
Ethernet OAM remote loopback must be supported by both the remote port and the sending port.
Enabling Ethernet OAM remote loopback interrupts data communications. After Ethernet OAM remote loopback is disabled, all the ports involved will go down and then come up. Ethernet OAM remote loopback can be disabled by any of the following events:
Disabling Ethernet OAM.
Disabling Ethernet OAM remote loopback.
Timeout of the Ethernet OAM connection.
Enabling internal loopback test on a port in remote loopback test can terminate the remote loopback test. For more information about loopback test, see Layer 2—LAN Switching Configuration Guide.
You can enable Ethernet OAM remote loopback on a specific port in user view, system view, or Ethernet port view. The configuration effects are the same.