Dell PowerEdge M805 Fabric OS Command Reference Manual Supporting Fabric - Page 665

portCfg 2 tunnel_Id This command has the following operands: Specifies the tunnel ID for the configuration change. The valid range is 0 to 7. config Creates or modifies a FICON configuration. delete Deletes an existing FICON configuration. The following optional feature arguments are supported with the config and delete options. These configurations are persistent. -x 1|0 Enables (1) or disables (0) XRC emulation. FICON XRC Emulation allows XRC (IBM eXtendedRemote Copy, also known as IBM z/OS Global Mirroring) to operate effectively at extended distances. -w 1|0 Enables (1) or disables (0) Tape Write Pipelining. This feature improves the performance of certain applications when writing to tape over extended distances. -r 1|0 Enables (1) or disables (2) Tape read pipelining. This feature improves performance for certain applications when reading from FICON tape over extended distances. -t 1|0 Enables or disables TIN/TIR emulation. This feature enhances recovery when a TIN/TIR exchange occurs as part of a channel recovery operation during tape emulation. -l 1|0 Enables (1) or disables (0) Device Level Acknowledgement emulation. This feature is applicable to both FICON Disk and Tape configurations. The feature removes one network round trip for exchanges that end with a Device Level Acknowledgement frame from the device. -i 1|0 Enables (1) or disables (0) FICON tape read block ID. This feature permits FICON write channel programs containing embedded read block ID commands (Cadres) with a byte count of exactly four bytes to be processed as emulated commands during write emulation processes. The following optional parameter-specific arguments are supported with the config and delete options. -a |--wrtMaxPipe value Defines the maximum number of tape write channel commands (CCWs) that can enter the write pipeline for a single device whether all the CCWs are bundled in a single channel program or in multiple channel programs. The setting has significance only for host (channel) initiated operations at this side and does not affect tape write operations initiated by hosts (channels) attached at the opposite side. Too small of a value results in poor performance. The value should be chosen based upon the typical tape channel program that requires optimum performance. The default value is 32. The range is 1 to 100. -b |--rdMaxPipe value Defines the maximum number of tape read channel commands (CCWs) that can enter the read pipeline for a single device whether all the CCWs are bundled in a single channel program or in multiple channel programs. The setting has significance only for host (channel) initiated operations at this side and does not affect tape write operations initiated Fabric OS Command Reference 633 53-1001764-02