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When a TBE Board Is Configured Only with a Unidirectional Cross-Connection, the Unidirectional Service Is Not Available. When the TBE Board Is Configured with Bidirectional Cross-Connections, the Bidirectional Service Is Normal; When a Unidirectional Cross-Connection Is Deleted, However, the Service

Publication Date:  2012-07-25 Views:  39 Downloads:  0
Issue Description
When a TBE board is configured only with a unidirectional cross-connection, the unidirectional service is not available. When the TBE board is configured with bidirectional cross-connections, the bidirectional service is normal; When a unidirectional cross-connection is deleted, however, the service becomes unavailable. 
Alarm Information
Null  
Handling Process
Configure the TBE board with bidirectional cross-connections. 
Root Cause
When a TBE board is configured with a unidirectional cross-connection, the PHY chip at the receive end becomes linkdown and cannot extract clock signals from the received data. The PHY chip needs to use the clock signal extracted from the received data when sending data. As a result, the PHY chip fails to send data and the unidirectional service is unavailable. 
Suggestions
Null 

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