HP 6125G Configuration Manual page 18

CAUTION:
Use this function with caution, because enabling Ethernet OAM remote loopback impacts other services.
When you enable Ethernet OAM remote loopback on a port, the port sends Loopback Control
OAMPDUs to a remote port, and the remote port enters the loopback state. The port then sends test
frames to the remote port. By observing how many of these test frames return, you can calculate the
packet loss ratio on the link to evaluate the link performance.
You can enable Ethernet OAM remote loopback on a specific port in user view, system view, or Layer 2
Ethernet interface view. The configuration effects are the same.
Configuration guidelines
Ethernet OAM remote loopback is available only after the Ethernet OAM connection is established
•
and 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 shut down and then come up. Ethernet OAM
remote loopback can be disabled by any of the following actions: executing the undo oam enable
command to disable Ethernet OAM; executing the undo oam loopback interface or undo oam
loopback command to disable Ethernet OAM remote loopback; and Ethernet OAM connection
timing out.
Ethernet OAM remote loopback is only applicable to individual links. It is not applicable to link
•
aggregation member ports or service loopback group member ports. In addition, do not assign
ports where Ethernet OAM remote loopback is being performed to link aggregation groups or
service loopback groups. For more information about link aggregation groups and service
loopback groups, see Layer 2—LAN Switching Configuration Guide.
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
Configuration procedure
To enable Ethernet OAM remote loopback in user view:
Task
Enable Ethernet OAM remote
loopback on a specific port.
To enable Ethernet OAM remote loopback in system view:
Step
1. Enter system view.
Enable Ethernet OAM remote
2.
loopback on a specific port.
To enable Ethernet OAM remote loopback in Layer 2 Ethernet interface view:
.
Command
oam loopback interface
interface-type interface-number
Command
system-view
oam loopback interface
interface-type interface-number
11
Remarks
Disabled by default.
Remarks
N/A
Disabled by default.