HP 6125XLG R2306-HP 6125XLG Blade Switch FCoE Configuration Guide - Page 105
Configuring FC tracert, Overview
View all HP 6125XLG manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 105 highlights
Configuring FC tracert Overview In an FC SAN, use the fctracert command to obtain bidirectional routing information between source and destination, and check the network connectivity. You can use this feature to identify failed nodes and test network connectivity. FC tracert comprises two processes: • Uplink process-In this process, beginning from the source, each switch along the path to the destination sends the Switch Trace Route (STR) packet to its next hop until the STR packet reaches the destination switch. (If the destination of FC tracert is a node, the destination switch refers to the FCF switch directly connected to the node.) Each switch adds its uplink path information (including its WWN and domain ID) to the STR packet. After the STR packet reaches the destination switch, the downlink process starts. • Downlink process-In this process, beginning from the destination switch, each switch along the path to the source switch sends the STR packet to its next hop until the STR packet reaches the source switch. Each switch adds its downlink path information (with the same content as the uplink path information) to the STR packet. When the source switch receives the STR packet, the FC tracert process ends. The source outputs information (in the STR packet) about all uplink and downlink switches along the path. If an FCF switch fails to forward the STR packet, the switch sets an error reason in the packet and sends the packet (containing information about switches the packet has passed through) directly to the source switch. Figure 27 shows the FC tracert process. Figure 27 FC tracert flowchart Source switch Switch A Intermediate switch Switch B Destination switch Switch C STR Request STR ACC STR Request STR ACC STR Request STR ACC STR Request STR ACC The following describes the process of an FC tracert operation from Switch A to Switch C. 99