Contents

Introduction· 1

Prerequisites· 1

Example: Configuring Ethernet OAM·· 1

Network configuration· 1

Analysis· 1

Restrictions and guidelines· 1

Procedures· 2

Configuring Device A· 2

Configuring Device B· 2

Verifying the configuration· 2

Configuration files· 4

Related documentation· 4

 

Introduction

This document provides Ethernet OAM configuration examples.

Ethernet OAM is a tool that monitors the status of the link between two directly connected devices.

Prerequisites

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of Ethernet OAM.

Example: Configuring Ethernet OAM

Network configuration

As shown in Figure 1, the edge devices Device A and Device B connect the enterprise network and the carrier network. Configure Ethernet OAM on Device A and Device B to meet the following Service Level Agreement (SLA) requirements:

·     Device A and Device B automatically monitor the link between them.

·     The administrator can view critical link events on the link between Device A and Device B.

·     The administrator can obtain the link status by observing link error event statistics.

Figure 1 Network diagram

 

Analysis

For Device A to establish an Ethernet OAM connection with Device B, configure XGE3/1/1 on Device A to operate in active mode, and configure XGE3/1/1 on Device B to operate in passive mode.

To implement link event detection based on the network environment, configure errored frame event detection parameters and use global settings for other detection parameters.

Restrictions and guidelines

To change the Ethernet OAM mode on an Ethernet OAM-enabled port, first disable Ethernet OAM on the port.

Procedures

Configuring Device A

# Configure Ten-GigabitEthernet 3/1/1 to operate in active Ethernet OAM mode (default mode), and enable Ethernet OAM for it.

<DeviceA> system-view

[DeviceA] interface ten-gigabitethernet 3/1/1

[DeviceA-Ten-GigabitEthernet3/1/1] oam mode active

[DeviceA-Ten-GigabitEthernet3/1/1] oam enable

# Set the errored frame event detection window to 20000 milliseconds, and set the errored frame event triggering threshold to 10.

[DeviceA-Ten-GigabitEthernet3/1/1] oam errored-frame window 200

[DeviceA-Ten-GigabitEthernet3/1/1] oam errored-frame threshold 10

[DeviceA-Ten-GigabitEthernet3/1/1] quit

Configuring Device B

# Configure Ten-GigabitEthernet 3/1/1 to operate in passive Ethernet OAM mode, and enable Ethernet OAM for it.

<DeviceB> system-view

[DeviceB] interface ten-gigabitethernet 3/1/1

[DeviceB-Ten-GigabitEthernet3/1/1] oam mode passive

[DeviceB-Ten-GigabitEthernet3/1/1] oam enable

[DeviceB-Ten-GigabitEthernet3/1/1] quit

Verifying the configuration

# Display Ethernet OAM configuration globally and on ports that do not use the default configuration.

[DeviceA] display oam configuration

---------------- [Global] ----------------

 OAM timers

   Hello timer        : 1000 milliseconds

   Keepalive timer    : 5000 milliseconds

 Link monitoring

   Errored symbol period

     Window           : 100 x 1000000 symbols

     Threshold        : 1 error symbols

   Errored frame

     Window           : 10 x 100 milliseconds

     Threshold        : 1 error frames

   Errored frame period

     Window           : 1000 x 10000 frames

     Threshold        : 1 error frames

   Errored frame seconds

     Window           : 600 x 100 milliseconds

     Threshold        : 1 error seconds

 

----------- [Ten-GigabitEthernet3/1/1] -----------

 OAM timers

   Hello timer        : 1000 milliseconds

   Keepalive timer    : 5000 milliseconds

 Link monitoring

   Errored symbol period

     Window           : 100 x 1000000 symbols

     Threshold        : 1 error symbols

   Errored frame

     Window           : 200 x 100 milliseconds

     Threshold        : 10 error frames

   Errored frame period

     Window           : 1000 x 10000 frames

     Threshold        : 1 error frames

   Errored frame seconds

     Window           : 600 x 100 milliseconds

     Threshold        : 1 error seconds

# Display the statistics for critical Ethernet OAM link events that occurred on all ports of Device A.

[DeviceA] display oam critical-event

----------- [Ten-GigabitEthernet3/1/1] -----------

 Local link status   : UP

 Event statistics

   Link fault        : Not occurred

   Dying gasp        : Not occurred

   Critical event    : Not occurred

The output shows that no critical link event has occurred on the link between Device A and Device B.

# Display Ethernet OAM link event statistics for the local end of Device A.

[DeviceA] display oam link-event local

----------- [Ten-GigabitEthernet3/1/1] -----------

 Link status: UP

 OAM local errored frame event

   Event time stamp        : 5789 x 100 milliseconds

   Errored frame window    : 200 x 100 milliseconds

   Errored frame threshold : 10 error frames

   Errored frame           : 13 error frames

   Error running total     : 350 error frames

   Event running total     : 17 events

The output shows the following information:

·     350 errors have occurred after Ethernet OAM is enabled on Device A.

·     17 errors are caused by error frames.

·     The link is unstable.

 

NOTE: If the link is unstable, contact H3C Support.

 

Configuration files

·     Device A:

#

interface Ten-GigabitEthernet3/1/1

 port link-mode route

 oam errored-frame window 200

 oam errored-frame threshold 10

 oam enable

#

·     Device B:

#

interface Ten-GigabitEthernet3/1/1

 port link-mode route

 oam mode passive

 oam enable

#

Related documentation

·     H3C SR8800-X Routers High Availability Command Reference-R8380

·     H3C SR8800-X Routers High Availability Configuration Guide-R8380

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