Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 635
portBufferCalc, Specifies port speed as 8Gbps.
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portBufferCalc portBufferCalc Calculates the number of buffers required per port. Synopsis portbuffercalc [slot/]port [-distance distance] [-speed speed] [-framesize framesize] portBufferCalc --help Description Use this command to calculate how many buffers are required for a given distance, speed, and framesize. You can use the same number of buffers and port speed, when configuring the portCfgLongDistance command. If no options are specified, then the current port's configuration is considered to calculate the number of buffers required. Notes Buffers required for the given frame size, distance and speed is calculated using the below formula: • 1 buffer is required for 1 km at 2G (2048 framesize). • 8 buffers are required for 1 km at 16G (2048 framesize). Operands This command supports the following operands: -distance distance Specifies the desired distance with valid range of 10Km to 1500Km. -speed speed Specifies the port speed. The valid values are: 1 Specifies port speed as 1Gbps. 2 Specifies port speed as 2Gbps. 4 Specifies port speed as 4Gbps. 8 Specifies port speed as 8Gbps. 10 Specifies port speed as 10Gbps. 16 Specifies port speed as 16Gbps. 32 Specifies port speed as 32Gbps. -framesize framesize Specifies the desired framesize in bytes with a maximum value 2048. --help Displays command usage. Brocade Fabric OS Command Reference 611 53-1004112-02