Hello All, First time posting here,but long time user of CentOS Linux.
Hardware- ASRock E350M1 mini-itx mobo onboard Realtek rtl8111e (rev 02) nic #eth1 - internet pci-e Realteck rtl8111e (rev 06) nic #eth0 - lan # changed from the default r8169 driver to the correct r8168 driver that this particular nic(s) are known to have problems,,even after three years on CentOS 5.x and CentOS 6.x. This made no change in the iperf results, for completeness. Also- Vonage phone behind this server - for completeness. OS- CentOS 6.3 32-bit Problem - On my new build server of CentOS 6.3 and running asterisk i am getting bad voip quality on both astersik phones and my Vonage phone. I never had this problem on my old server, go figure. The remote end hears me badly most of the time, I can always hear the remote end fine. Troubleshoot - I was trying to get familiar with trying to setup an tc_htb setup to do QoS to at least my Vonage phone. Now before things get carried away I try and do some iperf runs from my new server to three different Linux servers at my workplace remotely. In doing the most elementary iperf runs from my server to remote server via a vpn connection I am seeing a lot of 'drops' in a 60 second run of iperf. I used three different remote servers to try and get an average. long story short, I am getting identical results to all three remote servers. Question - How do I troubleshoot the following iperf 60 second run that always shows about 8-10 drops on each run? Here is a paste from one of the 60 second iperf runs to a remote server. Also worth noting when I do an iperf run between this new server and a temp linux server on my lan I never get these drops,,just for completeness. Also,,,if i do a simple ping to each of these servers remotely i never get any dropped packets , again for completeness. #paste iperf -c 172.28.8.66 -i 1 -t 60 ------------------------------------------------------------ Client connecting to 172.28.8.66, TCP port 5001 TCP window size: 21.6 KByte (default) ------------------------------------------------------------ [ 3] local 172.31.100.254 port 37457 connected with 172.28.8.66 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 1.0- 2.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 2.0- 3.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 3.0- 4.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 4.0- 5.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 5.0- 6.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 6.0- 7.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 7.0- 8.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 8.0- 9.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 9.0-10.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 10.0-11.0 sec 256 KBytes 2.10 Mbits/sec [ 3] 11.0-12.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 12.0-13.0 sec 256 KBytes 2.10 Mbits/sec [ 3] 13.0-14.0 sec 1.00 MBytes 8.39 Mbits/sec [ 3] 14.0-15.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 15.0-16.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 16.0-17.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 17.0-18.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 18.0-19.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 19.0-20.0 sec 256 KBytes 2.10 Mbits/sec [ 3] 20.0-21.0 sec 1.12 MBytes 9.44 Mbits/sec [ 3] 21.0-22.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 22.0-23.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 23.0-24.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 24.0-25.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 25.0-26.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 26.0-27.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 27.0-28.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 28.0-29.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 29.0-30.0 sec 384 KBytes 3.15 Mbits/sec [ 3] 30.0-31.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 31.0-32.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 32.0-33.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 33.0-34.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 34.0-35.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 35.0-36.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 36.0-37.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 37.0-38.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 38.0-39.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 39.0-40.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 40.0-41.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 41.0-42.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 42.0-43.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 43.0-44.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 44.0-45.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 45.0-46.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 46.0-47.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 47.0-48.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 48.0-49.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 49.0-50.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 50.0-51.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 51.0-52.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 52.0-53.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 53.0-54.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 54.0-55.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 55.0-56.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 56.0-57.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 57.0-58.0 sec 0.00 Bytes 0.00 bits/sec [ 3] 58.0-59.0 sec 640 KBytes 5.24 Mbits/sec [ 3] 59.0-60.0 sec 512 KBytes 4.19 Mbits/sec [ 3] 0.0-60.7 sec 26.1 MBytes 3.61 Mbits/sec #end Thank You, Barry ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
