HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 350
Displaying the remaining buffers in a port group
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Example: Consider the 8/24 SAN Switch, which has 24 ports and total buffers of 676 The maximum remaining number of buffer credits after each port is reserved is: 676 - (24 * 8) = 484 buffers Where: 24 = the number of ports in a port group retrieved from Table 77. 8 = the number of reserved buffers 676 = a static number retrieved from Table 77. If you allocate the entire 484 + 8 reserved buffers = 492 buffers to a single port; that port can support 486km @ 2G, which is the reserved buffer for distance. How many 50km ports you can configure? If you have a distance of 50km at 8 Gbps then 484 / (206 - 8) = 2 ports. If you have a distance of 50km at 1 Gbps then 484 / (31 - 8) = 21 ports. NOTE: The 10 Gbps FC10-6 blade has two port groups of three ports each. For extended ISLs, all buffers available to a group are used to support one port at up to 120 km. Displaying the remaining buffers in a port group Issue the portbuffershow command to display all of the long distance buffer information for all the port groups of the switch. Use the following syntax: portbuffershow [[slotnumber/]portnumber] slotnumber portnumber For bladed systems only, specifies the slot number of the port group to display, followed by a slash (/). Specifies the number of a port associated with the port group, relative to its slot for bladed systems. Use switchShow for a list of valid ports. 1. Connect to the switch and log in as admin. 350 Administering Extended Fabrics