Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 621

pathInfo In a Virtual Fabric environment, pathInfo displays port numbers beyond physical port numbers while displaying information for a hop that corresponds to a path in the base fabric. The cost for this hop is the cost of the corresponding path in the base fabric plus a small offset. Refer to the Examples section for an illustration. Other command options allow the collection of information on the reverse path, or on a user-selected path (source route). For each hop, this command displays the following fields: Hop The hop number. The local switch is hop 0. In Port The port on which the switch receives frames. For hop 0, this is source_port. identified by the port index. Domain ID The domain ID of the switch. Name The name of the switch. Out Port The output port that the frames take to reach the next hop. For the last hop, this is destination_port identified by the port index. BW The bandwidth of the output interswitch link (ISL), in Gbps. This parameter does not apply to the embedded port. If the bandwidth is zero, it is displayed as 1 Gbps. For logical interswitch links (LISL) ports, the bandwidth displays as 8 Gbps, the maximum bandwidth on hardware platforms on which LISLs can be formed. In cases where the LISL bandwidth is zero, pathInfo displays a bandwidth of 4 Gbps. Cost The cost of the output link used by the fabric shortest path first (FSPF) routing protocol. This parameter applies only if the output link is recognized by FSPF. You can request more detailed statistics for each hop in addition to the routing information. These statistics are presented for the input and output ports for both receive and transmit modes. You can select basic or extended statistics or both when running pathInfo in interactive mode. Statistics are not reported for the embedded port. Some throughput values are reported in multiple time intervals, to describe both current path utilization and the average throughput over a larger period of time. To collect these statistics, this command uses a special pathInfo frame that is sent hop-by-hop from the source switch to the destination switch. To prevent such a frame to loop forever if an error occurs, a maximum number of hops for the frame to traverse is enforced. The hop count includes all hops in the direct path from source to destination, and also all the hops in the reverse path, if the tracing of the reverse path is requested. The default value for the maximum hop count is 25. Brocade Fabric OS Command Reference 597 53-1004112-02