Dell Brocade 6520 Command Reference Supporting Fabric OS v7.1.0 - Page 614

2 pathInfo 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. The source route can specify a full route from source to destination or a partial route. In a partial route the remaining hops are chosen as the path from the input port on the first hop not listed in the source route to the destination. The maximum hop count is enforced in both cases. If the source route does not specify all the switches along a section of the path, you can specify a strict or a loose path. A strict source route requires that only the specified switches are reported in the path description. If two switches are specified back-to-back in the source route descriptor but are not directly connected, the switches in-between are ignored. In a loose source route, the switches in-between are reported. The concepts of strict and loose route apply only to the portions of the path described by domains, not to the part described by output ports. 586 Fabric OS Command Reference 53-1002746-01