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ALM_GFP_dCSF is the GFP client signal loss alarm. When the source does not receive the client signal, it sends a management frame to the host, and reports this alarm when the host receives this management frame.
Since R6 hosts support this alarm reporting, we summarize the types of boards that support this alarm reporting in each version.
| Host version | Supported boards |
| R6 (5.xx.16.xx) | N1EMS4, N1EGS4 |
| R8 (5.xx.18.xx) | N1EAS2, N1EGS4, N3EGS4, N1EMS4, N2EFS4, N4EFS0 |
| R9 (5.xx.19.xx) | N1EAS2, N1EFS0A, N1EGS4, N1EMS2, N1EMS4, N2EFS4, N3EFS4, N3EGS4, N4EFS0, N4EGS4, N5EFS0 |
| R10 (5.xx.20.xx) | n1eas2, n1efs0a, n1egs4, n1ems2, n1ems4, n2efs4, n3efs4, n3egs4, n4efs0, n4egs4, n5efs0 |
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