Dell POWEREDGE M1000E - Manual (Page 724)

692 Fabric OS Command Reference
53-1001764-02
portCmd
2
Loss(%) The number of TCP retransmits. This number averages the TCP retransmit
rate over the last display interval.
Delay(ms) The smoothed TCP round-trip time and variance estimate in milliseconds.
PMTU The path maximum transmission unit (MTU) represents 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. There is limited support for black hole PMTU detection. PTMUs
of decreasing size are sent: Jumbo PMTU (greater than 1500 bytes), 1500
bytes, and 1260 bytes, the minimum PMTU supported for FCIP tunnels. If the
1260 PMTU transmission fails, --ipperf terminates. There is no support for
aging. During black hole PMTU detection the BW, WBW, Loss and PMTU
values printed may not be accurate.
VLAN tagging ensures that test traffic traverses the same path as real FCIP traffic. A VLAN tag entry
must exist prior to issuing the --ping or --traceroute commands; this includes both the local and
remote sides. A VLAN Tag table entry is dynamically maintained by the ipperf application.
The following portcmd features are platform-specific:
Tperf Brocade FX-24 and 7800 only.
VLAN tagging Brocade FX-24/7800 and FR4-18i/7500.
IPv6 Brocade FX-24/7800 and FR4-18i/7500.
ipperf Brocade FR4-18i and 7500 only.
Notes End-to-end path characterization is not supported if there exists an IPSec-enabled tunnel using the
same source/local IP address.
Make sure to use --ping and --ipperf with a double-dash (--). If the dashes are omitted, a
message displays indicating that the command is deprecated.
The execution of this command is subject to Virtual Fabric or Admin Domain restrictions that may
be in place. Refer to chapter 1, "Using Fabric OS commands" and Appendix A, "Command
Availability" for details.
Operands This command has the following operands:
slot For bladed systems only, specifies the slot number of the port to be
configured, followed by a slash (/).
geport Specifies the port number of the GbE port on the blade.
--
ipperf Determines the path characteristics to the remote host. Valid arguments and
their values include the following:
-s src_ip Specifies the local IP address to use for sourcing the probe packets. ipperf
will not start if there exists an IPSec-enabled tunnel using the same source IP
address. IPv6 addresses are supported.
-d dst_ip Specifies the destination IP address to which to probe the IP router path. IPv6
addresses are supported.
-S Instructs the source mode to initiate the TCP connection. The source
end-point generates a traffic stream and reports the end-to-end IP path
characteristics from this end-point to the receiver end-point sink.