HP StorageWorks 2/16V Brocade Fabric OS Command Reference Manual (53-1000240-0 - Page 501

Note: Enter commands in lowercase only; mixed case is for readability. portCmd 2 -r committed_rate Specifies committed rate for the date stream, in Kb/s. If specified, the traffic generator is limited by a traffic shaper. This characterizes the endto-end IP path performance based on the data rate configured for a tunnel between the same end-points. If a rate is not specified, the traffic generator competes for uncommitted bandwidth. This operand is optional. -t running_time Specifies total time to run the test traffic stream, in seconds. If not specified, the test runs continuously until you explicitly abort the operation with Ctrl+c. This operand is optional. -z size Specifies the size for each buffer handed to the TCP layer, in bytes. If not specified, the maximum sized data buffer is used based on the outgoing IP interface MTU. The size is the only buffer size sent to the TCP layer. This operand is optional. --ipperf output displays: Sampling frequency(s) This is the interval specified with the --ipperf command with -i option or the default (30s). BW This is the bandwidth measured in the last interval. Bandwidth is defined as the total packets and bytes sent. Note: BW represents what the FCIP tunnel / FC application sees for throughput rather than the Ethernet onthe-wire bytes. WBW This is the weighted bandwidth currently with a gain of 50%. Loss (%) This is the number of TCP retransmits. This number is an average rate over the last display interval. Delay (ms) This is the TCP smoothed RTT and variance estimate in milliseconds. PMTU 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, --ipperf will try 1500 bytes (the minimum PMTU supported for FCIP tunnels). If 1500 PMTU fails, --ipperf will give up. There is no support for aging. During black hole PMTU detection the BW, WBW, Loss and PMTU values printed may not be accurate. --ping [slot/]geport -s src_ip -d dst_ip [-n num_requests] [-q service_type] [-t ttl] [-w wait_time] [-z size] Pings a destination IP address from one of the source IP interfaces on the GbE port. Valid arguments include: Fabric OS Command Reference Manual Publication Number: 53-1000240-01 2-467