Network speed monitoring?

Hey,
Does anyone know of any software that will monitor AND log my network connection information (throughput in/out, specifically)? I've found plenty of programs that will monitor the connection, but will not save the data over time.
I want to do this because I'm suspicious of my ISP... I have the " up to 18mb/s" service, and various internet speed tests ROUGHLY corroborate this speed, however it seems like almost every website I go to (except for the speed test websites LOL) loads incredibly slow.
Ultimately I'd like to have a printable graph of my network throughput over a specified period of time (days, weeks, months, even years).
Anyone have any ideas?

Hi Greenwall, and a warm welcome to the forums!
Does anyone know of any software that will monitor AND log my network connection information (throughput in/out, specifically)?
http://homepage.mac.com/rominar/net.html
I want to do this because I'm suspicious of my ISP... I have the " up to 18mb/s" service, and various internet speed tests ROUGHLY corroborate this speed, however it seems like almost every website I go to (except for the speed test websites LOL) loads incredibly slow.
See if this speeds it up...
Try putting these numbers in Network>TCP/IP>DNS Servers, for the Interface you connect with...
208.67.222.222
208.67.220.220
Then Apply

Similar Messages

Network speed test throughput monitor

I am looking for a quick and dirty speed test to continously monitor the bidirectional throughput of a transponder and POE device while they are undergoing environmental testing.
Would be nice if it could log throughput, dropped packets, and bit error rates between two computers and did not crash when a fault causes one end to stop responding like the C program we have now.
Our C programmer looks at us like we are insane when we ask him to not stop display an errror if the client or server times out.

Yes, I know how to handle and suppress errors in LabView. I was mainly looking for a good example on a network speed test.
The test we have uses was written by one of our software guys, it uses two computers in a client-server arrangement and stops and displays an error message when the client computer loses connection to the server. Regardless of the reasoning I have given the programmer refuses to change it because he wrote the test for him and that's how he wants it.
I want a program that can use one computer with two network cards.
It will send a data stream out one NIC, through the UUT, and back in the other NIC.
Where it Will be checked for errors and dropped packets, and sent back through the UUT.
A continuous throughput speed measurment will also be logged along with errors, dropped packets, and retries.
I have never used any of the LV networking, tcp, etc VI's and was hoping someone had done this before because I do not have time to start from scratch.

Network speed affected by large file copy operations. Also, why intermittent network outages?

Hi
I have a couple of issues on our company network.
The first is thate a single large file copy imapcts the entire network and dramatically reduces network speed and the second is that there are periodic outages where file open/close/save operations may appear to hang, and also where programs that rely on
network connectivity e.g. email, appear to hang. It is as though the PC loses it's connection to the network, but the status of the network icon does not change. For the second issue if we wait the program will respond but the wait period can be up to 1min.
The downside of this is that this affects Access databases on our server so that when an 'outage' occurs the Access client cannot recover and hangs permamnently.
We have a Windows Active Directory domain that comprises Windows 2003 R2 (soon to be decommissioned), Windows Server 2008 Standard and Windows Server 2012 R2 Standard domain controllers. There are two member servers: A file server running Windows 2008 Storage
Server and a remote access server (which also runs WSUS) running Windows Server 2012 Standard. The clients comprise about 35 Win7 PC's and 1 Vista PC.
When I copy or move a large file from the 2008 Storage Server to my Win7 client other staff experience massive slowdowns when accessing the network. Recently I was moving several files from the Storage Server to my local drive. The files comprised pairs
(e.g. folo76t5.pmm and folo76t5.pmi), one of which is less than 1MB and the other varies between 1.5 - 1.9GB. I was moving two files at a time so the total file size for each operation was just under 2GB.
While the file move operation was taking place a colleague was trying to open a 36k Excel file. After waiting 3mins he asked me for help. I did some tests and noticed that when I was not copying large files he could open the Excel file immediately. When
I started copying more data from the Storage Server to my local drive it took several minutes before his PC could open the Excel file.
I also noticed on my Win7 client that our email client (Pegasus Mail), which was the only application I had open at the time would hang when the move operation was started and it would take at least a minute for it to start responding.
Ordinarlily we work with many files
Anyone have any suggestions, please? This is something that is affecting all clients. I can't carry out file maintenance on large files during normal work hours if network speed is going to be so badly impacted.
I'm still working on the intermittent network outages (the second issue), but if anyone has any suggestions about what may be causing this I would be grateful if you could share them.
Thanks

What have you checked for resource usage during one of these copies of a large file?
At a minimum I would check Task Manager>Resource Monitor. In particular check the disk and network usage. Also, look at RAM and CPU while the copy is taking place.
What RAID level is there on the file server?
There are many possible areas that could be causing your problem(s). And it could be more than one thing. Start by checking these things. And go from there.
Hi, JohnB352
Thanks for the suggestions. I have monitored the server and can see that the memory is nearly maxed out with a lot of hard faults (varies between several hundred to several thousand), recorded during normal usage. The Disk and CPU seem normal.
I'm going to replace the RAM and double it up to 12GB.
Thanks! This may help with some other issues we are having. I'll post back after it has been done.
[Edit]
Forgot to mention: there are 6 drives in the server. 2 for the OS (Mirrored RAID 1) and 4 for the data (Striped RAID 5).

I am desperate!! slow choppy network speeds (not actual inability to cnnct)

I have a 13" macbook air that has the following problem: I can connect to wifi networks (including at home WPA and also tried WPA2 settings) but even though I may get proper speed at first, I soon lose that and it becomes much slower and choppy (if I open activity monitor I can see the speed going up and down like crazy...). My internet speed at home is 12mpbs set by my provider. When I perform speed tests (vis speedtest.net or downloading files from other speed test sites) on my windows PC that is also on this network I get the full download speed. However with this MAC while I initially did get the full speed, it is now down to an average of 3-5mbps and the activity monitor, again, shows choppy behavior so it will be at 8 then at zero almost and then up and down again but never near the full speed. I tried to connect to other networks and I have the same problem - once this happens it stays. I tried removing the airport connection in network preferences and adding it again it does not help.
I TALKED TO APPLE AND HAD MY COMPUTER TESTED BY THEM - they didn't find any hardware issues (they said it was fine - but it isn't) but they still replaced the airport hardware in the computer - both the chip and the antenna (which meant replacing the entire screen). I brought the computer home, ran a speed test and everything was fine. I thought GREAT but then something happened and the problem returned. What I did (which I think was unrelated) was connect via SMB to a PC at home and I tried to stream a movie file. I noticed it kept 'pausing' so I opened up activity monitor again and to my HORROR I saw the choppy wave with network speed very inconsistent going up and down like crazy... I tried connecting to my slingox using the sling web access after disconnecting from my home PC but got partial speed and lots of drops too. I tried the speed test again multiple times, nothing seems to work.
SO I don't know what to do at this point. I have 10.6.6 running. I heard something about a firmware update but I am new to mac so not sure how to even do that or what else I can do to solve this problem or what is causing it. BTW - logging in now from the guest account still does not fix the issues and they remain the same.
I am desperately looking for help!!
Thanks a lot!

Have you been able to reproduce your problems on other wireless networks other than at your house? It appears you are saying that this occurs on all wireless, but I'm not sure from your comment. If it's only at home, it would appear to be a compatibility issue between your wireless access point and the Macbook Air, which isn't uncommon. Sometimes a firmware upgrade to the access point can fix it, sometimes it might require switching to a different brand of access point. It would be great if you could borrow (or buy and return) a different access point/router to test. An Apple airport would be the best to use of course. Not the easiest solution, but lets you help rule out a hardware issue with your air.
My isp provides 15mbps but my wireless devices such as my iphone, ipad, laptop usually only get 6.5-8 mbps when testing speeds to the internet. I don't expect it to be as good as the wired due to interference, signal, etc. I don't get the choppy behavior however. Firware updates from Apple will appear in the same manner as standard software updates. If there is one available for your system it should appear when you check for software updates. That being said, I believe you can also manually download them from the Apple site.

How to track network speeds - maybe through SQL or open to others

The network speed is dramatically slower to the SAN, but it also makes me wonder how slow things are between the Webserver and the external world.
What's the best way to monitor what-I-assume are network delays and which part of the networks are causing the problem.
-- Needs to be run on the VM Machine xxxx to work
/* Local backup */
BACKUP DATABASE [play_pen] TO
DISK = N'x:xxxx\testbackup.bak' WITH COPY_ONLY, FORMAT, INIT,
NAME = N'Speed backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10, CHECKSUM, CONTINUE_AFTER_ERROR
-- BACKUP DATABASE successfully processed 35289 pages in 7.638 seconds (36.095 MB/sec).
/* Intra-Network backup*/
BACKUP DATABASE [play_pen] TO
DISK = N'\\xxxx\testbackup.bak' WITH COPY_ONLY, FORMAT, INIT,
NAME = N'Speed backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10, CHECKSUM, CONTINUE_AFTER_ERROR
-- BACKUP DATABASE successfully processed 35289 pages in 14.152 seconds (19.480 MB/sec).
/* SAN backup*/
BACKUP DATABASE [play_pen] TO
DISK = N'\\xxxx\testbackup.bak' WITH COPY_ONLY, FORMAT, INIT,
NAME = N'Speed backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10, CHECKSUM, CONTINUE_AFTER_ERROR
-- BACKUP DATABASE successfully processed 35289 pages in 55.106 seconds (5.002 MB/sec)

Hi,
You can use the tools like Resource Monitor and Network Monitor.
Resource Monitor is a tool that you can use to monitor the usage of CPU, hard disk, network, and memory in real time. You can open it by clicking the
Start button. In the search box, type Resource Monitor, and then, in the list of results, click
Resource Monitor. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.‌
Meanwhile, I think it is proper to dig the networking issue on the Windows Server forum via the below link.
http://social.technet.microsoft.com/Forums/en-US/home?forum=winservergen
Additional information:
Using Network trace to troubleshoot intermittent connectivity issues
http://blogs.msdn.com/b/dataaccesstechnologies/archive/2010/06/18/using-network-trace-to-troubleshoot-intermittent-connectivity-issues.aspx
Thanks.
Tracy Cai
TechNet Community Support

[Request] NTM - Network Traffic Monitor

Hi to everyone:
Could anyone package this?: NTM - Network Traffic Monitor
NTM is a monitor of the network and internet traffic for GNU/Linux. Some characteristics:
* Choice of the interface to monitoring.
* Period to monitoring: Day, Week, Month, Year or Custom Days. With autoupdate.
* Threshold: Autodisconnection if a limit is reached (by NetworkManager).
* Traffic Monitoring: Inbound, outbount and total traffic; Show the traffic speed.
* Time Monitoring: Total time of connections in the period.
* Time Slot Monitoring: Number of sessions used.
* Reports: Show of average values and daily traffic of a configurable period.
* Online checking with NetworkManager or by "Ping Mode".
* The traffic is attributed to the day when the session began.
* Not need root privilege.
* Not invasive, use a system try icon.
NTM is useful for the people that have a internet plan with a limit, and moreover the exceed traffic is expensive.
NTM is write in python and is a open source software, the license is the GNU GPL v2.
A lot of thanks.

#Maintairner: Brieuc Roblin <brieuc.roblin at gmail dot com>
pkgname='ntm'
pkgver='1.2.2'
pkgrel='1'
pkgdesc="Monitor of the network and internet traffic"
arch=('i686' 'x86_64')
license=('GPL')
depends=('pywebkitgtk' 'lsb-release' 'networkmanager')
makedepends=('dpkg')
url=('http://netramon.sourceforge.net/eng/index.html')
source=('http://freefr.dl.sourceforge.net/project/netramon/NTM/ntm-1.x/ntm-1.2.2.deb')
md5sums=('ec438b8c952ac866ffdaa57538d189b7')
build() {
cd "$srcdir"
# Extracting deb
msg2 "Extracting .deb ..."
dpkg-deb -x ntm-*.deb deb
cd "deb"
# Installing
msg2 "Installing..."
cp -r . "$pkgdir"/
I can't really test the program as I'm not using NetworkManager.
Last edited by PyrO_70 (2010-08-20 19:18:24)

Network speed per connection

Hi.
I created a small command to monitor my network speed with conky:
netstat -taupe | grep ESTABLISHED | tr -s " " | sed "s|$\S*$\s$\S*$\s$\S*$\s\S*:$\S*$\s$\S*$\s$\S*$\s$\S*$\s$\S*$\s$\S*$|\2 \3 :\4 \5 \9|" | column -t | sort -r
0 0 :52725 channel27.01.0:www-http 27750/pidgin
0 0 :41564 mirrors2.kernel.org:ftp 28978/wget
0 0 :39694 fritz.box:1012 27791/ffgtk
0 0 :32945 mirrors2.kernel.o:57747 28978/wget
The problem is that my 600k wget connection is always shown with 0k. Is there a better working solution for that?
Thanks in advance.
Andreas

You would probably have to cross reference the same info iftop uses with the information from netstat to make the correspondence data stream <-> program. Mind you that any program can have a few instances downloading/uploading data so you may have to sum them.

Migrating from SonicWALL to RRAS - questions on functionality for business network setup & monitoring

At my organization we are planning to move away from using SonicWALL and using Microsoft Server 2012 RRAS to handle IPv4 NAT routing and VPN connections for remote employees. I am trying to plan for all the functionality I currently have in our
SonicWALL router, and I'm not familiar with the Windows equivalent for some features and/or if the available features will have all the functionality our organization needs. Additionally wondering if there is something better that you would recommend
in terms of ease-of-use / management from an IT standpoint.
Feature: Firewall
I assume that Windows Advanced Firewall can handle all the firewall settings that I would normally find in an enterprise router. Is this a correct assumption?
Feature: Content blocking
What Microsoft technology would I use for blocking certain content and websites from being viewed in the workplace network? Can Windows Firewall handle these two types of content blocking?:
Blocking websites by general content - i.e. block porn sites.
Blocking websites by specific URL
Feature: Network activity monitoring
In cases where the network is slow, what would I use to inspect what IP/MAC is hogging bandwidth? Currently on SonicWALL we are able to see which computer is hogging bandwidth, see what website is, how much bandwidth it is consuming. Can RRAS
handle this level of detail, or is SCOM / some other technology more well-suited? Should we use a non-Microsoft application (something like Wireshark) instead?
Feature: Network prioritization (QoS / bandwidth management)
Can we set certain network groups to have priority over others? For example, if we split our incoming network into two networks using RRAS, 192.168.50.x for data and 10.0.50.x for VOIP, I want the VOIP network to get priority in order to
ensure quality audio on all phone calls. I assume this is available in RRAS.
Basically I'm just looking to see what systems I need set up to satisfy these business needs. If anyone has any real-world experience let me know what your setup is like -- I'm curious to know!

"I assume that Windows Advanced Firewall can handle all the firewall settings that I would normally find in an enterprise router. Is this a correct assumption?"
Your statement as it stands is correct. In fact, Windows firewall will handle more firewall settings than those found in a
router. However, SonicWall is not just a router - it's a firewall. There is a big difference. Given that you are comparing Windows Firewall to a robust firewall, I agree with Dennis that you should either stay with SonicWall or
look at Microsoft's product. But, given that on the link Dennis provided, you will find that Microsoft is discontinuing UAG, you might want to stick with what you know - SonicWall. Or, you need to evaluate your needs more. Yes, Microsoft
provides a number of built-in capabilities that may address your particular needs. We can't answer that. But, if there are features you need that are not available via Windows Server, then it is best to get a product that addresses those needs.
.:|:.:|:. tim

I'm looking for some help connecting linksys IP Cameras to my home network to monitor my property when I'm travelling. I used to do this with linksys WAPS, but since I've discarded all my old linksys networking and standardized on airport, I can't get the

I'm looking for some help connecting linksys IP Cameras to my home network to monitor my property when I'm travelling. I used to do this with linksys WAPS, but since I've discarded all my old linksys networking and standardized on airport, I can't get these things working. I know that I have to identify my camera through the DHCP table and set up port forwarding and there is the problem.
My network consists of 4 base stations set up in a roaming network - same network name and passwords. I need to do it this way so I don't have to switch network when I move from one side of the house to the other, go to the cabana, or my shop in the barn. The network works pretty well since I went to a roaming set up. Good performance, yata, yata, yata.
However, the roaming network requires the AEBS's to be set up in bridge mode, rather than sharing an ip address. When the AEBS is set to bridge mode, you don't see a DCHP table or have the ability to identify your IP Cam through the AEBS - and hence, no port forwarding.
I am able to identify and set up my Linksys IP Cam by locating the ip address on my FIOS router, even though, it's plugged into an AEBS. I set it up, see the video, remove the ethernet cable from the IP Cam, restart - and I can't get to it from an AEBS. In researching this, it appears, I should be setting up the AEBS to "share an IP Address", going to the DHCP table and identifying the camera's IP address and setting up port forwarding. However, you don't see any of the DHCP or port forwarding options in Airport Network Utility when configuring in bridge mode.
I'm hoping I'm missing something here and that the solution isn't to set it up at the FIOS router level, but I'm beginning to think that's my only hope. What concerns me there is that I should be able to see the IP cam on the network without port forwarding since I'm not coming from outside, and I can't even do this unless it's connected hard wire.
I'd appreciate any insight into this that anyone might have. I've hit the wall with what I know.
Thanks.

In a roaming network, your "main" router is the device that would require port mapping/forwarding to be configured in order to access the IP camera from the Internet. This router is also the one that would be provide the private IP address for the camera which you will want to be a static one.
So as you described your network, the IP cameras should be getting an IP address or you assigned it a static one and this is the address that you would enter in the Private IP address (or equivalent depending on the router used) field when setting up port mapping.
If you are not able to access this camera from the local network, then this should be troubleshot first.

Poor network speed with 1st generation time capsule and multiple airport express 5Ghz. My network speed slows to a crawl when not close to the time capsule. I get the range that I need, but the speed is painfully slow.

Hello,
I have a first generation time capsule running 802.11n (b/g compatable) and the airport expresse's are the newer 5ghz models. I have 3 airport express's and I have the range that I need. I can run the time capsule using 802.11n 5ghz, but I loose the range and can't connect to all of the airport express's. My computers and mobile devices run 802.11n. Does anyone have any suggestions on how to increase the network speed. Would the new airport extreme fix the problem?
Thank you

Unfortunately, you are experiencing one of the downsides to 5 GHz. That's because the higher frequency 5 GHz signals are much weaker than 2.4 GHz signals.
After all, you always have to give up something to gain something else. In the case of 5 GHz, you gain potential speed but in return, you must give up penetration power and distance capability.
In order to work well, 5 GHz signals need to almost have a line-of-sight relationship between devices. Unless you can achieve this, you will do much better to leave the Time Capsule running at the 802.11n (b/g compatible) 2.4 GHz Radio Mode and allow the Express devices to "extend" that network.
As for the location of the AirPort Express devices in an exended network, that is critical for best performance. That's because the Express can only "extend" the quality and bandwidth of the signal that it receives. Post back if you need a few more tips on how to find the best location for the AirPort Express devices.
Would the new airport extreme fix the problem?
Unfortunately, no.

[SOLVED] Network speed very slow, no apparent reason

Hello, recently I switched from Windows 7 RC1 to Arch on my home machine (I have used Gentoo, Ubuntu, and Fedora 10 on the same machine in the past), and for some reason network speed is very slow.
I have Verizon's 20mbit/5mbit package, and I have always gotten that speed.
Using speedtest.net and 100mb.test from cachefly on multiple computers I have come to the conclusion that it is infact my Arch install that is causing the problem:
- All other machines on my network are getting 20/5 (both wired and wireless)
- I ran a speedtest from 2 other machines using the ethernet cable that this PC is on. Again, full 20/5.
- scp transfer of 100mb.test from this PC -> other Arch box: ~2.8MB/s.
- scp transfer of 100mb.test from other Arch box -> this PC: ~2.8MB/s.
- scp transfer of 100mb.test from this PC -> UK VPS (100mbit line): ~539KB/s
- scp transfer of 100mb.test from UK VPS -> this PC: ~76KB/s
- scp transfer of 100mb.test from this PC -> Chicago Server (dual gbit lines): ~563KB/s
- scp transfer of 100mb.test from Chicago Server -> this PC: ~91KB/s
speedtest.net result:
Upload speed seems to be unaffected.
I have tried disabling TCP window scaling, and appending my hostname to /etc/hosts.
What is weird though is that the other Arch box has an identical network config, I don't see any reason why it shouldn't work.
My NIC is an integrated Realtek something, I can get the exact model if needed.
Last edited by whipsch (2009-06-05 18:29:21)

Hi, whipsch
Can you try ethtool to see if your ethernet card is actually negociating and using a 100Mb full duplex link on your LAN ? If not you can try to force the link parameter with ethtool. Also maybe the driver of your NIc has options related to link negociation.
Hope this helps,
JF

Set network speed & mode in Solaris 10

Hi all,
Can someone know how to change the network speed and mode in solaris 10 SPARC
I tried with ndd -set , is this valid for Solaris 10
How can I check the speed and mode
Regards,
Hakim

It depends on what type of interface card you have, but basically you can use ndd -set and ndd-get commands on most of the NICs in a Sun box:
Network Interface Cards documentation:
http://docs.sun.com/app/docs/prod/net.inter.crds#hic
I have bge cards, so, I run this command to see what parameters I can alter:
ndd -get /dev/bge0 \?
? (read only)
autoneg_cap (read only)
pause_cap (read only)
asym_pause_cap (read only)
1000fdx_cap (read only)
1000hdx_cap (read only)
100T4_cap (read only)
100fdx_cap (read only)
100hdx_cap (read only)
10fdx_cap (read only)
10hdx_cap (read only)
adv_autoneg_cap (read and write)
adv_pause_cap (read and write)
adv_asym_pause_cap (read and write)
adv_1000fdx_cap (read and write)
adv_1000hdx_cap (read and write)
adv_100T4_cap (read only)
adv_100fdx_cap (read and write)
adv_100hdx_cap (read and write)
adv_10fdx_cap (read and write)
adv_10hdx_cap (read and write)
lp_autoneg_cap (read only)
lp_pause_cap (read only)
lp_asym_pause_cap (read only)
lp_1000fdx_cap (read only)
lp_1000hdx_cap (read only)
lp_100T4_cap (read only)
lp_100fdx_cap (read only)
lp_100hdx_cap (read only)
lp_10fdx_cap (read only)
lp_10hdx_cap (read only)
link_status (read only)
link_speed (read only)
link_duplex (read only)
link_autoneg (read only)
link_rx_pause (read only)
link_tx_pause (read only)
loop_mode (read only)
msi_cnt (read and write)
drain_max (read and write)
speed:
ndd -get /dev/bge0 link_speed (Note that this is read-only attribute)
100
duplex:
ndd -get /dev/bge0 100fdx_cap (read/write atrribute)
1
etc...
To set duplex during boot, I do this:
cat /etc/init.d/NICtune.s
#!/sbin/sh
# This script tunes the NIC to 100 Full Duplex
case "$1" in
start)
ndd -set /dev/bge0 adv_1000fdx_cap 0
ndd -set /dev/bge0 adv_1000hdx_cap 0
ndd -set /dev/bge0 adv_100fdx_cap 1
ndd -set /dev/bge0 adv_100hdx_cap 0
ndd -set /dev/bge0 adv_10fdx_cap 0
ndd -set /dev/bge0 adv_10hdx_cap 0
ndd -set /dev/bge0 adv_autoneg_cap 0
stop)
continue
echo "Usage: $0 { start | stop }"
exit 1
esac
exit 0
ln -s /etc/init.d/NICtune /etc/rc2.d/S99NICTune
HTH
John

Standard local network speed test?

I recently setup up a dual-band (dedicated n, dedicated g) wireless network, and I think I am having some issues with throughput (qualitative observation). So I started trying to find a good metric for performance of the wireless systems. Note, I am talking here about the local wireless (Airport devices between home computers), not the connected internet speed (cable, DSL, fiber).
I see a lot of people copying files and timing the transfer. Is this the best there is? From what I've read, ping isn't such a good metric for network throughput. You can watch the kb/s transfer report on copy, but that isn't exactly stable or indicative of general performance. Any other tools, programs, methods, etc.? Or should I just be timing file transfers?
Thanks!

Yes, I know how to handle and suppress errors in LabView. I was mainly looking for a good example on a network speed test.
The test we have uses was written by one of our software guys, it uses two computers in a client-server arrangement and stops and displays an error message when the client computer loses connection to the server. Regardless of the reasoning I have given the programmer refuses to change it because he wrote the test for him and that's how he wants it.
I want a program that can use one computer with two network cards.
It will send a data stream out one NIC, through the UUT, and back in the other NIC.
Where it Will be checked for errors and dropped packets, and sent back through the UUT.
A continuous throughput speed measurment will also be logged along with errors, dropped packets, and retries.
I have never used any of the LV networking, tcp, etc VI's and was hoping someone had done this before because I do not have time to start from scratch.

OVM 3.0 - network speed

Hi together,
quick question regarding domU network throughput in OVM 3.0.3.
We did a very simple TCP Network Throughput Benchmark with NETIO and ended up with the following result.
Setup:
- OVM Server 3.0.3 on x86_64
- OVM Guests OEL 5.7 64bit (2.6.32-200.13.1.el5uek) PVM with xennet
- 10Gbit physical network (especially for the bonds serving the VM network bridges)
Network Speed between two different dom0`s:
Packet size 1k bytes: 320.12 MByte/s Tx, 302.97 MByte/s Rx.
Packet size 2k bytes: 367.94 MByte/s Tx, 472.63 MByte/s Rx.
Packet size 4k bytes: 694.60 MByte/s Tx, 841.67 MByte/s Rx.
Packet size 8k bytes: 953.76 MByte/s Tx, 972.38 MByte/s Rx.
Packet size 16k bytes: 1012.60 MByte/s Tx, 1.017 GByte/s Rx.
Packet size 32k bytes: 1.002 GByte/s Tx, 1.008 GByte/s Rx.
Network Speed between two domU´s running on the same dom0:
Packet size 1k bytes: 354.65 MByte/s Tx, 382.91 MByte/s Rx.
Packet size 2k bytes: 468.07 MByte/s Tx, 473.96 MByte/s Rx.
Packet size 4k bytes: 495.54 MByte/s Tx, 575.83 MByte/s Rx.
Packet size 8k bytes: 526.07 MByte/s Tx, 548.81 MByte/s Rx.
Packet size 16k bytes: 533.61 MByte/s Tx, 603.46 MByte/s Rx.
Packet size 32k bytes: 571.73 MByte/s Tx, 650.30 MByte/s Rx.
Network Speed between two domU´s running on different dom0`s:
Packet size 1k bytes: 155.06 MByte/s Tx, 156.07 MByte/s Rx.
Packet size 2k bytes: 176.94 MByte/s Tx, 196.74 MByte/s Rx.
Packet size 4k bytes: 185.37 MByte/s Tx, 200.06 MByte/s Rx.
Packet size 8k bytes: 157.51 MByte/s Tx, 218.15 MByte/s Rx.
Packet size 16k bytes: 191.40 MByte/s Tx, 202.36 MByte/s Rx.
Packet size 32k bytes: 185.55 MByte/s Tx, 204.82 MByte/s Rx.
As you can see, the domU`s on two different OVM Servers have arround 80% performance loss compared to the available speed on the dom0 layer.
2 domU´s on the same dom0 are around 50% slower.
Is that normal?
If not, what can be tweaked?
Some reference measurements on other environments would be great.
Thanks,
Claudius

I had a similar slowdown due to dropped packets (and the necessary retransmissions) using a private network on a single host. See thread: Re: Private network dropping packets
It resulted in a bug but there was a workaround. I'd do an 'ethtool -K eth0 rx off tx off sg off tso off' and then an 'ethtool -K eth0 rx on tx on sg on tso on'.
a) the second command undoes what the first command does,
b) my network path does not include eth0 in the link that is dropping packets!
c) the commands must be repeated after any host reboot.
I have no idea what might be the underlying cause - my guess is an obscure race condition in the Oracle xen network stack - so I have no idea if this workaround will affect your issue. You can try the pair of commands on both hosts (pick any interface) and see what happens. You also might look at the traffic to see if dropped packets are the problem and pin down where they are being dropped - that will be tedious!
Good Luck!

Looking for Third Party VPN W/O Significant Network Speed Hit

As the title indicates, I am looking for a VPN app (Windows) which will not significantly ding my network speed. I have FiOS (75/35). I understand there is normally a speed drop while connected to a VPN but dropping from 75Mbps to 1.5Mbps is unacceptable. I have only tested Spotflux so any other suggestions would be appreciated.
To clarify, any app would have to be compatible with PeerBlock. I do not care about advertising as Ad Block Plus takes care of that. As for speed, on average, I would expect no less than 20-30Mbps. Also, I want the ability to choose my own servers (whether foreign or domestic).

Check out https://www.ipvanish.com
I'm on a mac, but the windows app works well too. While connected to one of the Miami servers, which are in the same state as me, I can often get nearly my full 75 Mbps down when using openvpn (udp). IPVanish has servers around the world, some have better speeds than others. Your speed will depend on a few factors, distance from server being used, server load, etc. For best results I'd suggest using one of the "A" servers, example mia-a01, lon-a02, nrt-a01, etc.

Network speed monitoring?

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