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Configuring Ethernet OAM Link Fault Management

The Ethernet interfaces on SRX Series devices support the IEEE 802.3ah standard for Operation, Administration, and Maintenance (OAM). The standard defines OAM link fault management (LFM). The below topics discuss the overview of Ethernet OAM LFM for SRX series devices, and examples of configuring OAM.

Example: Configuring Remote Loopback Mode on VDSL Interfaces on a Security Device

Starting in Junos OS Release 15.1X49-D110, configuring remote loopback mode in Ethernet OAM link fault management (LFM) on a VDSL interface is supported on SRX320, SRX340, SRX345, and SRX550M devices.

This example describes the following configuration scenarios:

Starting in Junos OS Release 12.3X48-D65, configuring remote loopback mode in Ethernet OAM link fault management (LFM) on a VDSL interface is supported on SRX210, SRX220, SRX240, and SRX550 devices.

This example describes the following configuration scenarios:

  • Scenario 1: Configuring remote loopback mode on a VDSL interface.

  • Scenario 2: Configuring remote loopback mode on a VDSL interface acting as a PPPOE’s underlying interface.

Requirements

This example uses the following hardware and software components:

  • Junos OS Release 15.1X49-D110 or later for SRX Series Services Gateways

  • An SRX 210/220/240/320/340/345/550/550M device connected with a DSLAM

Before you begin:

Overview

This example uses an SRX Series device connected to a DSLAM. Before you begin configuring Ethernet OAM LFM on these two devices, connect the two devices directly through supported interfaces. See Understanding Ethernet OAM Link Fault Management for SRX Series Services Gateways.

Figure 2 shows the topology used in this example.

Figure 2: Ethernet LFM with SRX Series DevicesEthernet LFM with SRX Series Devices
Note:

For more information about configuring Ethernet OAM Link Fault Management, see Junos® OS Ethernet Interfaces.

Configuration for Scenario 1

To configure remote loopback mode on a VDSL interface, perform these tasks:

Configuring Remote Loopback Mode on a VDSL interface of an SRX Series Device

CLI Quick Configuration

To quickly configure this example, copy the following command, paste it into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the command into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.

Step-by-Step Procedure

To configure remote loopback mode on a VDSL interface of an SRX Series device:

  1. Enable OAM on a VDSL interface.

  2. Enable remote loopback support for the interface.

Results

From configuration mode, confirm your configuration by entering the show protocols command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.

Configuration for Scenario 2

To configure remote loopback mode on a PPPOE’s underlying interface, perform these tasks:

Configuring Remote Loopback Mode on a PPPOE’s underlying interface

CLI Quick Configuration

To quickly configure this example, copy the following command, paste it into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the command into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.

Step-by-Step Procedure

To configure remote loopback mode on a PPPOE’s underlying interface:

  1. Create the PPPoE interface pp0 and specify the logical PT interface pt-1/0/0 as the underlying interface.

  2. Specify that the interface initiates the discovery process.

  3. Enable remote loopback mode.

Results

From configuration mode, confirm your configuration by entering the show protocols command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.

Verification

Verify the OAM LFM Configuration

Purpose

Verify that OAM LFM is configured properly.

Action

From operational mode, enter the show oam ethernet link-fault-management command.

Meaning

The output displays the MAC address and the discovery state is Send Any if OAM LFM has been configured properly.