How to Replace an EOS EGS4 on Huawei OSN 3500?

Prerequisites

• You are an NM user with Operator Group rights or higher.
• The type and position of the board to be replaced must be confirmed.
• The old board and the new board have the same software version, and the new board does not contain any configurations.

Impact on System

The Ethernet boards Huawei EGS4 are classified into the transparent transmission boards and the switching boards. Replacing the boards of different types has the following impacts on services:

• If you replace a transparent transmission board, the services on the board are interrupted.
• When you replace a switching board, if the processing board is configured with the TPS/BPS/PPS/DLAG protection, the services on the processing board are protected.

Tools, Equipment, and Materials

Shielding bag, fiber extraction tool, and U2000

Procedure

1. Select the spare part.
   • Select the spare board that has the same parameters as the board to be replaced.
   • If the board to be replaced supports the board version replacement function, check for substitute boards.
2. Query and record the current alarms of the board.
3. If the board to be replaced is connected by fibers, record the positions of fiber connections and remove the fibers by using a fiber extraction tool.
4. Replace the board on the subrack of Huawei OSN 3500.
   When you remove or install the board, the BD_STATUS or COMMUN_FAIL alarm is reported. After the new board is online, the alarms are cleared automatically.

   The replacement considers the board that is configured with board-level protection as an example.