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Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Chapter 21 Configuring RMON
Unwrap Synchronization
Figure 21-3 Unwrapped Cisco proprietary RPR with Unidirectional Excessive CRC Errors
Bidirectional Errors
Figure 21-4 shows a Cisco proprietary RPR wrapped by excessive bidirectional CRC errors, both ports
are reporting CRC-ALARMs. The figure captions further explain the process.