Verifying DLAG Protection Switching

This topic describes the testing procedure for the DLAG protection switching that is triggered by the line failure after the fiber is removed.

Prerequisites

A DLAG protection group must be configured at station A.

The fiber connections between station A and station B must be complete.

The equipment must be running normally.

Tools, Equipment and Materials

U2000 Web LCT, SmartBits (SMB), optical fiber, flange

Test Connection Diagram

Figure 1 and Figure 2 show the DLAG protection in the normal and switching states.

Figure 1 DLAG protection (normal)

Figure 2 DLAG protection (switching)

Procedure

Connecting Test Instruments
1. Connect a SmartBits (SMB). See Figure 1. Make P2 send data packets and P1 receive the data packets.
Querying the Normal Channel Status of station A, as shown in Figure 1
1. Log in to the U2000 Web LCT. Double-click NE A in the Main Topology, and the status figure of NE A is displayed.
2. Right-click a NE icon and select NE Explorer to display the NE Explorer dialog box.
3. Select the NE from the Navigator Tree in the left-hand pane and choose Configuration > Ethernet Distributed Link Aggregation Management from the Function Tree.
4. Click Query. A prompt appears to indicate that the operation was successful. Click Close. In this case, Main Board is TBE1, and Slave Board is TBE2.
Querying the Protection Switching Channel Status of Station A.
1. Remove the fiber in the RX1/TX1 optical interface of the TBE1 board in station A to perform the switching, as shown in Figure 2.
2. In the NE Explorer dialog box, select the NE from the Navigator Tree in the left-hand pane and choose Configuration > Ethernet Distributed Link Aggregation Management from the Function Tree.
3. Click Query. A prompt appears to indicate that the operation was successful. Click Close. In this case, Main Board is TBE2, and Slave Board is TBE1.
4. Reconnect the fiber into the RX1/TX1 optical interface of TBE1 board in station A.
Switching time calculation: Switching time = (Packets sent by P2 - Packets received at P1)/Packet sending speed. The protection switching time must be smaller than 100 ms.