R3102-R3103-HP 6600/HSR6600 Routers High Availability Configuration Guide

CAUTION:

The Ethernet OAM remote loopback function can impact other services. Use it with caution.

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 and evaluate the link performance.

You can enable Ethernet OAM remote loopback on a specific port in user view, system view, or Layer

2 Ethernet port view. The configuration effects are the same.

Configuration guidelines

 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 shut down and then come up. Ethernet

OAM remote loopback can be disabled by any of the following events: 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, or the Ethernet OAM

connection timing out.

 Ethernet OAM remote loopback is only applicable to individual links. It is not applicable to link

aggregation member ports. In addition, do not assign ports where Ethernet OAM remote

loopback is being performed to link aggregation groups. For more information about link

aggregation groups, see Layer 2—LAN Switching Configuration Guide.

 Enabling an internal loopback test on a port already in a remote loopback test can terminate the

remote loopback test. For more information about loopback test, see Interface Configuration

Guide.

Enabling Ethernet OAM remote loopback in user view

Task

Command

Remarks

Enable Ethernet OAM remote

loopback on a specific port.

oam loopback interface

interface-type interface-number

Disabled by default.

Enabling Ethernet OAM remote loopback in system view

Step

Command

Remarks

1. Enter system view.

system-view

N/A