HP A7533A HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, Dece - Page 415

2. Configure the sender test endpoint using a similar CP CLI. The syntax for invoking the sender test endpoint using ipPerf for slot8, port ge0 on an FR4-18i is as follows: portcmd --ipperf 8/ge0 -s 192.168.255.100 -d 192.168.255.10 -S The following example shows the results of the performance analysis for slot 8, port ge0: ipperf to 192.168.255.10 from IP interface 192.168.255.100 on 8/0:3227 30s: BW:113.03MBps WBW(30s): 55.39MBps Loss(%):0.0 Delay(ms):1 PMTU:1500 60s: BW:108.89MBps WBW(30s): 83.08MBps Loss(%):0.0 Delay(ms):0 PMTU:1500 90s: BW:112.59MBps WBW(30s): 96.93MBps Loss(%):0.0 Delay(ms):0 PMTU:1500 120s: BW:108.93MBps WBW(30s): 103.85MBps Loss(%):0.0 Delay(ms):0 PMTU:1500 150s: BW:112.36MBps WBW(30s): 107.32MBps Loss(%):0.0 Delay(ms):0 PMTU:1500 where: • Sampling frequency is the interval specified with the portCmd --ippert command with the -i option or the default, 30 seconds. • Total Time is the3current running test total time in seconds for the last --ippert command issued. • BW is the bandwidth measured in the last interval. Bandwidth is defined as the total packets and bytes sent. BW represents what the FCIP tunnel / FC application sees for throughput rather than the Ethernet on-the-wire bytes. • WBW is the weighted bandwidth currently with a gain of 50 percent. • Loss(%) is the number of TCP retransmits. This number is an average rate over the last display interval. • Delay(ms) is the TCP smoothed round-trip time (RTT) and variance estimate in milliseconds. • PMTU is the path MTU. This is the largest IP-layer datagram that can be transmitted over the end-to-end path without fragmentation. This value is measured in bytes and includes the IP header and payload. Note: there is limited support for black hole PMTU detection. If the Jumbo PMTU (anything over 1500) does not work, - -ippert tries 1500 bytes. If 1500 PMTU fails, - -ipperf tries the lower PMTU of 1260 (the minimum PMTU supported for FCIP tunnels). If 1260 also fails, - -ipperf gives up. There is no support for aging. During black hole PMTU detection, the BW, WBW, Loss, and PMTU values printed may not be accurate. WAN tool ipPerf syntax When using the portCmd ipPerf option, you must specify the following: • Source IP address. If the ipPerf is started with -S (source mode), the port number specified is the remote peer's port number to connect to. • Destination IP address. • Source (transmitter) or sink (receiver). If the ipPerf is started with -R (sink mode), the port number and source IP address will be used to listen for new connections. If the options are not specified the following defaults apply: • Default port: 3227 • Default runtime: forever • Default display (refresh) interval: 30 seconds • Default size: 1MSS Fabric OS 6.1.x administrator guide 415