similar to: Tool Recommendations for measuring UDP throughput / loss / jitter

Aloha, Does anyone know of any opensource or inexpensive software that can test a network for a possible VoIP installation? I have seen Chariot by NetIQ, but it is very costly! I am envisioning two or three "client" devices that talk to a server device. Each client could simulate 1-100 VoIP phone calls. The server module would monitor the QOS, jitter, etc., and provide some kind of

Is there any piece of software that I can use to run between a client and a linux or windows server with a smb/cifs share that will test network speed, latency, sustained read/writes, multiple file create, read, write, close, etc.. etc.. over X period time? I'm testing a Centos server with samba and Windows 2k3/8 servers on the other end of a T1 connection and while I know the T1 bandwidth

> -----Original Message----- > From: Chris Shaw [mailto:chriss@watertech.com] > Sent: September 7, 2004 4:40 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: [Asterisk-Users] Maximum tollerable lag/jitter for IAX2 > w/ojitterbuffer enabled? > {clip} > > If you can reproduce it, this smells like a bug... IAX runs over TCP and TCP >

Hello, i am searching for a method to generate traffic and measure it, to compare several version of tc configurations. For my thesis i am researching the best way to use tc for medium sized companies. For this purpose i analyzed the company network and created a tc schema. Now i have to test this definition in a kind of simulation outside the network. Also i have to do a comparison of the

What's the best way to do this? Daily, jpg images are added to an inhouse server. Everynight I want to backup these images to a server offsite, via rsync. What I want is to determine what to set the bwlimit to. I also want to estimate how many MB's of images I can move nightly. Thanks Dan

I am trying to trouble shoot one of my ISP's network and compare to my other ISPs offering. Although network 1 is reasonably fast and has low enough latency, voice quality is not good and the reason for this is not readily apparent using standard network tools. What tools can be used to assess the quality of the network in terms of it's suitability for voice? I am using ping, mtr,

Greetings list, Hoping someone might have experience with poorly-performing net connections and which devices work best over them. One of our clients has a number of employees that work from home, and are given a SIP phone to take with them and hook up to their broadband. For the most part, this works fine, but there are an increasing number where sound quality is poor ("chops" in and

Hi there! I am working a lot with VoIP in my company, so I thought to use linux bridge functionality together with tc to emulate delay, jitter, packet loss, duplication, reordering etc. for testing purposes in our lab against our VoIP products. I just recognized, that a basic bridge just with it''s minumum configuration of 2 network interfaces creates latency of approx. 5ms on very low

On 12-03-2015 17:39, Digimer wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 12/03/15 04:29 PM, Gilbert Sebenste wrote: >> Hello everyone, >> >> A network engineer buddy of mine brought up for discussion with me >> that he'd like to do some throughput testing, but he's new to >> Linux/RedHat. Is there any software I can recommend to

Hello all, We've discovered that VoIP (IAX2) + Citrix + Video is pegging the measly CPU on the Netopia router our ISP provided. We've got 3Mb/3Mb and will increase to 4/4 next year. The Netopia simply breaks out our WAN IPs, and we've got a switch hooked up to it on the inside (Actually I've got a QoS box in-between). ------------- | Internet | | on Cat5 | -------------

Hello everyone, A network engineer buddy of mine brought up for discussion with me that he'd like to do some throughput testing, but he's new to Linux/RedHat. Is there any software I can recommend to him that any of you find above par for CentOS 6/7? Thanks! Gilbert ******************************************************************************* Gilbert Sebenste

Hi. I have 2 PC's connected with 1GBit NIC's. When I transfer a file from my File-Server(Redhat9.0, 256 SD-RAM, 300MHz PII, RTL8169 NIC, 2x Western Digital WD200JB RAID 0) to my Windows-PC(AMD Athlon XP 1800+, 1024 MB DDR-RAM, WINXP PRO, RTL8169 NIC, 2x Western Digital WD080JB RAID 0) with Samba, i get Speeds around 8-9MB/sec. I think this is too low for an GBit Network, so i tested the

Hi List. First post, be gentle please. Is there any limit in the linux UDP rate? I am using linux kernel 2.6 and iperf to measure bandwidth between two endpoints connected by 100 Mbits ethernet. Running (as root) iperf -u -s and iperf -u -c always gives me 1.05 Mbits/seg even when runned in the same machine. Can somebody clarify this? Thanks in advance. Sebastian

http://www.asterisk.org/node/48317 does a nice job of explaining the 1.4 jitter buffer, however it raised a question in my mind. In 1.2 (and also 1.4), when asterisk bridges 2 SIP channels, are the UDP RTP packets renumbered on transmit, or is the original sequence number preserved in the UDP header? A comment is made on the referenced blog that jitter buffering is best implemented at the

Hi ; +--------+ +-----------+ +--------+ | server |---------- | linux box |---------------------| Client | +--------+ +-----------+ +--------+ MY script: tc-htb3 qdisc del dev eth1 root ipchains -F tc-htb3 qdisc add dev eth1 root handle 10: htb default 20 r2q 40 tc-htb3 class add dev eth1 parent 10: classid 10:1 htb

Hi, We are running on 5.5 on a HP ProLiant DL360 G6. Kernel version is 2.6.18-194.17.1.el5 (we had also tested with the latest available kernel kernel-2.6.18-238.1.1.el5.x86_64) We running some performance tests using the "iperf" utility. We are seeing very bad and inconsistent performance on the UDP testing. The maximum we could get, was 440 Mbits/sec, and it varies from 250 to 440

Hello, While I was doing some tests in Arndale board, the network (iperf) throughput suddenly decreases to 5Mbps (from 100Mbps) out of nowhere. This typically happens when I generate traffic using iperf (100Mbps) while installing some packages using apt-get in dom0. Whenever this behavior happens, I can not see any distinguishable logs from any places. After some debugging, I found that

Hi, I have just started to work with Xen and have a question regarding the expected network throughput. Here is my configuration: Processor: 2.8 GHz Intel Celeron (Socket 775) Motherboard: Gigabyte 8I865GVMF-775 Memory: 1.5 GB Basic system: Kubuntu 6.06 Dapper Drake Xen version: 3.02 (Latest 3.0 stable download) I get the following iperf results: Src Dest Throughput Dom0 Dom0

Hi All, I am sure this has been answered somewhere in the list in the past, but I can''t find it. I was wondering if the linux guest netfront driver has GRO support in it. tcpdump shows packets coming in with 1500 bytes, although the eth0 in dom0 and the vif corresponding to the linux guest in dom0 is showing that they receive large packet: In dom0: eth0 Link encap:Ethernet HWaddr

Why not try something like Pebble linux from http://www.nycwireless.net/pebble It is a stripped down Debian install that is aimed at running a wireless hotspot but it is just Debian and you can install whatever you want. It fits on a 64MB flash card but if you install almost anything you will want a 128MB one. It does come with iptables and iproute2 tools as I recall. Patrick