Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 622

pathInfo Basic statistics Basic statistics report parameters that may indicate ISL congestion along the path. They include the following: B/s Bytes per second received or transmitted. This value is reported for multiple time periods displayed in parentheses. Txcrdz The length of time, in milliseconds, that the port was unable to transmit frames because the transmit BB credit was zero. The purpose of this statistic is to detect congestion or a device affected by latency. This parameter is sampled at 1 millisecond intervals, and the counter is incremented if the condition is true. Each sample represents 1 ms of time with zero Tx BB Credit. An increment of this counter means that the frames could not be sent to the attached device for 1 ms, indicating degraded performance. This value reports for multiple time periods, displayed in parentheses. Note that other commands, such as portStatsShow, may express this value in units other than milliseconds. Extended statistics Extended statistics report variables of general interest. They include the following: F/s The number of frames received or transmitted per second. This value is reported for multiple time periods, displayed in parentheses. Words The total number of 4-byte Fibre Channel words. Frames The total number of frames. Errors The total number of errors that may have caused a frame not to be received correctly. This includes cyclic redundancy check (CRC) errors, bad end-of-frame (EOF) errors, frame truncated errors, frame-too-short errors, and encoding errors inside a frame. Reverse path The path from port A on switch X to port B on switch Y may be different from the path from port B to port depending on the links traversed between a given sequence of switches, or the reverse path may involve different switches. The -r option displays routing and statistics information for the reverse path in addition to those for the direct path. Source route The source route option allows you to specify a sequence of switches or ports, which the pathInfo frame has to traverse to reach the destination. Therefore, the path specified may be different from the one used by actual traffic. The source route is expressed as a sequence of switches, a sequence of output ports, or a combination of both. The next hop in the source route is described by either the output port to be used to reach the next hop, or the domain ID of the next hop. 598 Brocade Fabric OS Command Reference 53-1004112-02