Perform Ethernet loopback transmission test

Procedure 11-20: Perform Ethernet loopback transmission test

Overview

Use this procedure to perform an Ethernet loopback transmission test. It is assumed that the Ethernet packet ring or point-to-point service has been configured using the procedures in this chapter.

Important!

The Port Maintenance parameter for the affected ports must be provisioned Allow to perform this procedure. If the Port Maintenance parameter for the affected ports is provisioned Inhibit, loopback commands for the affected ports are denied.

To view and provision the Port Maintenance parameter, a Privileged user must perform Procedure 7-23: Allow/inhibit port/tributary maintenance.

Privilege level

You must login as a General or Privileged user to complete this procedure.

Before you begin

Prior to performing this procedure, refer to Before you begin and Required equipment in this chapter and you must have complete work instructions for this procedure that detail:

The shelf slots, circuit packs, ports that are being tested.

You must have an Ethernet test set capable of applying the external test signal required for this procedure.

The following rules apply for this test:

Only out-of-service testing may be performed.
Only one loopback is allowed on a circuit pack.
Only one loopback is allowed on any one port in a multi-point packet ring, even if they are on different nodes

Steps

Use the following procedure to perform the loopback test:


1	Use the WaveStar^® CIT to log in to the near end Alcatel-Lucent 1665 DMXtend shelf. Reference: Procedure 14-2: Connect Personal Computer (PC) and establish WaveStar^® CIT session
2	Review the following test set considerations: Set the Destination Address to "Broadcast" (all Fs [FFFFFFFF}). Provision the test set data frames for the type of provisioned service being tested. Set the frame size to 1024 bytes. Set the transmission mode to send a single packet or to send a continuous stream at a rate much less than the interface and VCG rates. Make sure the VLAN tag is appropriate for the source and loopback ports.
3	For the circuit being tested, perform a terminal/facility loopback at the far-end node port. Select Fault → Analysis → Loopback from the System View menu at the far-end node. Expand the circuit pack details, select the port, then click Select at the bottom of the screen.
4	Verify the port AID, then select Operate. Click on Apply at the bottom of the window. Read the warning message, then click Yes to operate the command.
5	Connect the near end port to the Ethernet test set and start sending traffic.
6	Verify traffic is being received at the source node Ethernet test set.
7	Use the Fault → Analysis → Loopback command to release the loopback. Repeat this procedure for all circuits being tested. End of steps