HP StorageWorks 2/16V Brocade Fabric OS Command Reference Manual (53-1000240-0 - Page 464

2 Note: Enter commands in lowercase only; mixed case is for readability. portBufferShow portBufferShow Displays the buffer usage information for a port group or for all port groups in the switch. Synopsis portbuffershow [slotnumber/][portnumber] Description Use this command to display the current long distance buffer information for the ports in a port group. The port group can be specified by giving any port number in that group. If no port is specified, then the long distance buffer information for all of the port groups of the switch is displayed. The following long distance information is displayed: User Port Displays the index number of the port. Port Type Displays as E (E_Port), F (F_Port), G (G_Port), L (L_Port), or U (U_Port) depending on the port type. Lx Mode Long distance mode. Displays as L0 when the link is not in long distance mode, LE when the link is up to 10 Km, LM when the link is up to 25 Km, L1 when the link is up to 50 Km, L2 when the link is up to 100 Km LD when the distance is to be determined dynamically or LS when the distance is determined statically by user input. Max/Resv Buffers Displays the count of the maximum or reserved number of buffers that are allocated to the port based on the estimated distance (configured by the desired_distance operand of the portCfgLongDistance command). If the port is not configured in long distance mode, certain systems might reserve buffers for the port. This field then displays the number of buffers reserved for the port. Buffer Usage Displays the actual number of buffers allocate to the port. In LD mode, the number is determined by the actual distance and the user-specified desired distance (configured by the desired_distance operand of the portCfgLongDistance command). Needed Buffers Displays the number of buffers that are needed to utilize the port at full bandwidth (depending on the port configuration). If the number of Buffer Usage is less than the number of Needed Buffers, the port is operating in the buffer limited mode. Link Distance For L0 (not in long distance mode), the fixed distance displays based on the port speed, for instance: 1G as 10 Km, 2G as 5 Km, and 4G as 2 Km. For the static long distance modes, the fixed distance displays; for instance, LE as 10 Km, LM as 25 Km, L1 as 50 Km, and L2 as 100 Km. For LD mode, the physical distance in kilometers displays as measured by timing the return trip of a MARK primitive that is sent and then echoed back to the switch. The supported distance measurement is up to 500 Km. Distance measurement on a link longer than 500 Km might not be accurate. If the connecting port does not support LD mode, is shows "N/A". Remaining Buffers Displays the remaining (unallocated and reserved) buffers in a port group. When there is no connection to a port or the port is disabled, or the port is not an E_Port some of the information in this display is not relevant, such as long distance mode, needed buffers, and link distance. In this case, the irrelevant fields display as hyphens. 2-430 Fabric OS Command Reference Manual Publication Number: 53-1000240-01