Network speed changes

my network speed keeps changing from 11mbps with an excellent connection to 2 mbps with an excellent conection still, except when it drops i can't connect to the web, then i have to repair the whole deal and it's up and going again til it feels like doing it again which could be in 5 mins or 5 hours how can i fix this annoining problem?

What settings are you using on your router, and which standard are you using to connect; 802.11b or 802.11g
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Similar Messages

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).

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.

Very slow network speed

Since I changed from Mac OS 9.2.2 to Mac OS X 10.3.9 on my dual 450 Power Mac i am having always the same problem. after some new starts my network speed becommes very slow. internet, printer connection and also when using personal file sharing. Folder of 22MB takes about 1 hour insted of 3 seconds to send from one mac to the other. I was trying on both HD´s and with only security update from CD before using Internet. I also have to repair volume permissions.tried reset of PRAM. tried it with both HD´s separately installed, sometimes it helped for short time. but unfortunately I always get the problem also when I am not using intenet connection after installing 10.3.9 on a completely empty HD (also tried to formate mith zeros). On my other mac´s: G3 (400MHz), G4 (500MHz) PowerBook and Power Mac G4 450(single)
the system is working without any problem. same settings! Only the Power Mac G4 dual 450 I am having this problem. Software like Photoshop, X-Press and also Maxxon 4D are running fast and without problems. Please help me!!!

Since I changed from Mac OS 9.2.2 to Mac OS X 10.3.9 on my dual 450 Power Mac i am having always the same problem. after some new starts my network speed becommes very slow. internet, printer connection and also when using personal file sharing. Folder of 22MB takes about 1 hour insted of 3 seconds to send from one mac to the other. I was trying on both HD´s and with only security update from CD before using Internet. I also have to repair volume permissions.tried reset of PRAM. tried it with both HD´s separately installed, sometimes it helped for short time. but unfortunately I always get the problem also when I am not using intenet connection after installing 10.3.9 on a completely empty HD (also tried to formate mith zeros). On my other mac´s: G3 (400MHz), G4 (500MHz) PowerBook and Power Mac G4 450(single)
the system is working without any problem. same settings! Only the Power Mac G4 dual 450 I am having this problem. Software like Photoshop, X-Press and also Maxxon 4D are running fast and without problems. Please help me!!!

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 issues while using osx

this may seem a little bit strange, and i can't make any sense out of it but if anyone can figure out what my problem might be it would be greatly appreciated.
i have an older duel os (win xp, leopard) mbp and have had a lot of problems with hardware/software (osx) in the past, and have ended up, to my dismay, almost exclusively using windows.
anyway, just yesterday i decided it was time to give osx another chance. so besides having it hanging constantly while doing simple tasks, i have noticed my network speed is drastically reduced.
i ran a test on speedtest.net and ended up with 500kps average download speed, and 70kbps upload speed, with the closest server in my town at 800 ping.
i straight away restarded into windows and ran the test again, and achieved 13500kbps download, and 600kpbs upload, with a ping of 66.
NOTHING changed between the time of restarting. The router was left as it was, no other computers are switched on, and nothing is downloading.
In the past when using osx i have had frequent connection dropping issues, but as i run wireless i always just attributed it to my router. Although since using windows exclusively this has also ceased.
I have looked through airport settings and cannot find anything that looks like it may be the problem, although i'm not as experienced at getting into the back-end settings on osx.
the part that confuses me the most is the ping. latency generally increases with distance, not so much speed. i dont understand how the same server situated nearby can give 66 ms in windows and 800 in osx.
if anyone has any ideas, i thank you in advance.
p.s. i have osx 1.5.4 and was updating to 1.5.5 but the slow download speeds caused me to create this post. it does mention an increase in network performance in update notes for 1.5.5, if that will solve this than i apologize, although i doubt this drastic speed difference could have existed for so long if everything is set up correctly.

You are certainly not alone. I have the same problem. Download speed seems to be limited to 500KB/s (any program, any service) and 2.18MB/s using Windows. I tried two different routers with the same results. Even downloading the same files using rapidshare led to this. Very strange.
This has nothing to do with the DNS server. My connection speed is pretty fast. With and without the recommended OpenDNS server settings. I just re-installed Leopard and updated to 10.5.6. Nothing changed.
Seems like something is throttling the max. dl speed. Odd!

Orion shows 3750 port speed changes - is it normal?

Hi all,
We use Orion for monitoring. We recently started monitoring a workstation switch and find many occurances of port speed changes indicated. Our workstation ports are configured with auto speed and duplex. Is it normal that we are detecting speed changes on the ports? Do workstations running XP automatically adjust their speed for traffic management or power save? Perhaps something like speeds changing when PC goes to sleep mode but has wake on LAN enabled? Is it possible that the MIB is misreporting?
I realize that there are many different NIC vendors/drivers that might act differently. Just wondering (in others experience) if it is somewhat normal or if there is anything on network I should be looking into as to why speeds are changing? We plan to not monitor workstation ports (only uplinks) on the switch.. but before we do, I thought I would see if what we are detecting needs to be addressed?
Here is an example from Orion of a speed changing. Seems always off hours:
6/1/2012 6:17:52 AM
event
WoRKSTATION-3750-CLUSTER - GigabitEthernet1/0/14 · 2nd Floor Patch#11 Interface Speed changed from 10000000 to 1000000000 bps
6/1/2012 2:47:52 AM
event
WoRKSTATION-3750-CLUSTER - GigabitEthernet1/0/14 · 2nd Floor Patch#11 Interface Speed changed from 1000000000 to 10000000 bps
Thanks in advance for any experienced feedback.
Colin

Ours does it all the time for some reason. We presume it's due to the port negotiating speed during PC boot from 100mb to 1g, but never really followed up.

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.

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 offset speed change in frame rate conforming?

Hi all. I am conforming video from about 25fps to 30 fps in cinema tools, before editing in FCP. Does any one know of a formula, or calculator tool that would tell me the speed change percentage to use, to get the clip to play in normal speed while editing? Is there a setting to do this automatically in FCP?

And you needn't speed change the footage at all. Simply cutting 25fps footage into a 30fps timeline will do. If you really desire a formula, to convert 25 fps to 30, you need to run it slower (less frames) so the speed is 25/30 or 5/6ths or 83% - to do it the other way, 30/25 = 6/5ths or 120%.
But, like I said, if you cut PAL footage into an NTSC timeline, it will adjust the speed appropriately - sizing too...
Patrick

Upgrade and plug ins migration ? speed changes and transitions to motion 3

I have the FCS2 upgrade on its way soon i hope..
will my natress plug ins and others migrate when i go from FCS1 to 2?
I am mid project - have done all my captures but havent got into the nitty gritty of the edit yet - you reckon its a bit risky to upgrade?
I am super keen to get the ability to easily do ramps (in Motion 3 or in FC 6) and 3d logo fly arounds. Looking fwd to being able to throw transitions and speed changes into Motion 3 - i hear that it can deal with that now - is this true?

Thanks - thats all good

Adobe Media Encoder CS4 Causing Jerky Playback with Speed Changes

Here is an Matrox AVI that was captured in Adobe Premiere Pro CS4. Watching the edited clip with a speed change of 600% looked fine when played in Premiere Pro CS4.
When I export the clip using Adobe Media Encoder CS4 as MPEG2 Blu-ray with a preset of 1440 x 1080i High Quality playback is very jerky. An export of the same clip with normal speed looks great??
Any suggestions would be greatly appreciated
Thanks
Type: Matrox AVI
File Size: 119.9 MB
Image Size: 1440 x 1080
Pixel Depth: 24
Frame Rate: 29.97
Source Audio Format: 48000 Hz - 16 bit - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Total Duration: 00;00;36;27
Average Data Rate: 3.2 MB / second
Pixel Aspect Ratio: 1.3333
Codec Type: MPEG-2 IBP
Bit Depth: 8
Scan Mode: Interlaced - Upper Field First
Actual Image Size: 1440 x 1080
Here are the specs on my workstation
Case: Coolmaster-830
Op System: Vista Ultima 64 Bit
Edit Suite: Adobe Creative Suite 4 Production Premium Line Upgrade
Adobe Premiere Pro CS 4.0.1 update before installing RT.X2 Card and 4.0 tools
Performed updates on all Adobe Production Premium Products as of 03/09/2009
Matrox RTX2 4.0 Tools
Main Display: Dell 3007 30"
DVI Monitor: Dell 2408WFP 24"
MB: ASUS P5E3 Deluxe/WiFi-AP LGA 775 Intel X38
Display Card: SAPPHIRE Radeon HD 4870 512MB GDDR5 Toxic ver.
PS: Corsair|CMPSU-1000HX 1000W
CPU: INTEL Quad Core Q9650 3G
MEM: 2Gx4|Corsair TW3X4G1333C9DHXR DDR3 (8 Gigs Total)
1 Sys Drive: Seagate Barracuda 7200.11 500GB 7200 RPM 32MB
Cache SATA 3.0Gb/s
2 Raid 0: Seagate Barracuda 7200.11 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s Using Intel's integrared Raid Controller on MB

Have you ever upgraded Adobe Premiere Pro in the middle of a project?
By the way I captured the same clip in Adobe software only mode using HDV as a capture settings. The editing mode is Adobe HDV 1080i, 29.97 frames. The results are also jerky. When I render the clip captured it is also very grainy??
Type: MPEG Movie
File Size: 196.4 MB
Image Size: 1440 x 1080
Pixel Depth: 32
Frame Rate: 29.97
Source Audio Format: 48000 Hz - compressed - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Average Data Rate: 3.2 MB / second
Pixel Aspect Ratio: 1.3333
Thanks for responding so quickly!

[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

Alert: 'Network is changed by another application'

Opening 'systemconfiguration' I get the alert
'Network is changed by another application'
and I only can stop this by quitting 'systemconfiguration' instantly.
How can I fix this?
FW

It was one of the last two Security Updates.
To stop the pop-up, Go to System Preferences: Security. Check the box next to "Require password to unlock each secure system preference." Then lock Security.
Try this cure for Security update...
http://discussions.apple.com/thread.jspa?threadID=1730909&tstart=0
The locations are actually...
/Library/Preferences/SystemConfiguration/preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/com.apple.nat.plist

Network speed changes

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