HP StorageWorks 4/8 Brocade Fabric OS Command Reference Guide v6.0.0 (53-10005 - Page 494

2 portCmd -r committed_rate Specifies committed rate for the data stream, in Kb/s. If specified, the traffic generator is limited by a traffic shaper. This characterizes the end-to-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 aborted 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. -v vlan_id Specifies the VLAN ID. Values must be in the range of 1 - 4094. There is no default value. Note that a VLAN tag entry must exist on the local and remote sides prior to issuing the -v option. A VLAN Tag table entry will be dynamically maintained by the ipperf application.See the portCfg help page for details on creating a VLAN tag table. -c L2 Class-of-Service Specifies Class of Service/Priority, as defined by IEEE 802.1p. Values must be in the range between 0 and 7. The default is 0. This operand is optional. with the -v option The output of --ipperf output includes: Sampling frequency(s) The interval specified with the --ipperf command with the -i option or the default (30s). BW 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 on-the-wire bytes. WBW The weighted bandwidth currently with a gain of 50 percent. Loss (%) The number of TCP retransmits. This number is an average rate over the last display interval. Delay (ms) 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. If 1500 PMTU fails, --ipperf will try the lower PMTU of 1260 (the minimum PMTU supported for FCIP tunnels). If 1260 also 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 Pings a destination IP address from one of the source IP interfaces on the GbE port. Valid arguments include: -s src_ip Specifies the source IP address that originates the ping request. IPv6 addresses are supported. 468 Fabric OS Command Reference 53-1000599-01