When the SSN1EFS0 board of the OSN2500 is connected with the EFT board of Metro100, we test the service is successful with instrument, but if you test the service with test frame in the T2000, the test is failure. In the same configuration, if the SSN2EFS0 board is connected with EFT board, the service is tested successfully with both instrument and test frame in the T2000.
The different frame structure results in the test frame is failure in T2000.
In the general, the SSN1EFS0, SSN2EFS0 and EFT board all support the test frame function. If the test frame is failure, the frame structure may be not same in both side, and we need to check the frame structure in both side. To the frame structure, it includes MAC and GFP loading mode.
The SSN1EFS0 board only support MAC loading mode;
The SSN2EFS0 board can support both MAC and GFP loading mode;
The EFT board only support GFP load mode;
Becuase the frame structure is not same between SSN1EFS0 and EFT board, the test frame is failure in the T2000.
The different ethernet board can support different frame structure. We need to pay attention to it in connecting with different ethernet board.