HP 1606 Fabric OS FCIP Administrators Guide v6.4.0 (53-1001766-01, November 20 - Page 91

Sampling frequencys, Total Time, Delayms

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WAN performance analysis tools 4 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 192.41.70.43 from IP interface 192.41.70.42 on 0/1:3227 Sampling frequency(30s) Total time(30s) BW:112.73MBps WBW:55.57MBps Loss(%):0.00 Delay(ms):23 PMTU:1500 Sampling frequency(30s) Total time(60s) BW:112.77MBps WBW:83.61MBps Loss(%):0.00 Delay(ms):23 PMTU:1500 Sampling frequency(30s) Total time(90s) BW:112.43MBps WBW:97.46MBps Loss(%):0.00 Delay(ms):22 PMTU:1500 Sampling frequency(30s) Total time(120s) BW:112.32MBps WBW:104.33MBps Loss(%):0.00 Delay(ms):22 PMTU:1500 Sampling frequency(30s) Total time(150s) BW:112.15MBps WBW:107.69MBps Loss(%):0.00 Delay(ms):23 PMTU:1500 Sampling frequency(30s) Total time(180s) BW:112.54MBps WBW:109.55MBps Loss(%):0.00 Delay(ms):23 PMTU:1500 Where: Sampling frequency(s) The interval specified with the portCmd --ipperf command with the -i option or the default, 30 seconds. Total Time The current running test total time (in seconds) for the last --ipperf command issued. BW 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 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 round-trip time (RTT) and variance estimate in milliseconds. PMTU 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, --ipperf 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. Fabric OS FCIP Administrator's Guide 77 53-1001766-01

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Fabric OS FCIP Administrator’s Guide
77
53-1001766-01
WAN performance analysis tools
4
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 192.41.70.43 from IP interface 192.41.70.42 on 0/1:3227
Sampling frequency(30s) Total time(30s) BW:112.73MBps WBW:55.57MBps Loss(%):0.00
Delay(ms):23 PMTU:1500
Sampling frequency(30s) Total time(60s) BW:112.77MBps WBW:83.61MBps Loss(%):0.00
Delay(ms):23 PMTU:1500
Sampling frequency(30s) Total time(90s) BW:112.43MBps WBW:97.46MBps Loss(%):0.00
Delay(ms):22 PMTU:1500
Sampling frequency(30s) Total time(120s) BW:112.32MBps WBW:104.33MBps
Loss(%):0.00 Delay(ms):22 PMTU:1500
Sampling frequency(30s) Total time(150s) BW:112.15MBps WBW:107.69MBps
Loss(%):0.00 Delay(ms):23 PMTU:1500
Sampling frequency(30s) Total time(180s) BW:112.54MBps WBW:109.55MBps
Loss(%):0.00 Delay(ms):23 PMTU:1500
Where:
Sampling frequency(s)
The interval specified with the
portCmd
--
ipperf
command with the -i option
or the default, 30 seconds.
Total Time
The current running test total time (in seconds) for the last
--
ipperf
command
issued.
BW
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
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 round-trip time (RTT) and variance estimate in
milliseconds.
PMTU
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,
--
ipperf
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.