Network speed issue

Dear Experts,
We have a 10MB Data-link between our company and an external DATA-CENTER where our mail-server is hosted aswell, this 10MB link has been provided for us through an ISP.   so our issue is while we open outlook it takes 1 to 2 minutes to open,   but if we tick the (https) option on our outlook and then try to open outlook   then it is opening very fast in vew seconds.        as i think there is some sort of IPS device on the ISP or Data-Center side who filters our traffic and that is why it takes too much time while we open outlook without the https option ticked.
My question is how can i identify Where our packets are getting filtered (on the ISP or the DATA-CENTER) side ??    this is because as we contacted the ISP they say that we dont have any filtering device and ther is no issue at our end,    and the Data-Center is also claiming that there is not such issue at thier end.
So can any one tell me how can i identify where our packets are geting filtered and or where our packets get slowly processed so that i can give a proof to the ISP or data-Center that there is the main issue
Please help

How are you determining that Wireshark doesn't show anything abnormal? Have you run a packet capture on the source and destination of the transfer from the time the network seems to be working correctly to the time it ends up bogging down? Then comparing
the packets per second, transfer rate, packet size etc?
I have a bit of experience in Wireshark, but I mostly use Observer, which gives me all the info I need in one expert analysis screen. If there is a way to break down a TCP conversation and filter to a packet by packet conversation I'd look for re transmissions,
re acknowledgments, poor transfer rate etc. To me this sounds like there are a lot of re transmissions and re acknowledgements, but we can be sure until its analyzed correctly.

Similar Messages

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!

Network speed issues with TC

I have a couple gig of music in apple lossless format that I moved to shared drive on TC. The task took 20 hours for 4 gig. How can I speed up this network? If I burn a CD directly to the TC it is taking almost a hour per CD. I have an imac, mac mini, a mac notebook on the network plus a toshiba notebook and two squeeze boxes. Any advice? I figure with the toshiba off everything should be n speed.

I'm having similar issues. For months now, I have had super fast wireless speeds! 6, 7 + Meg per second. Now, suddenly, I'm barely getting 2 or 3. I thought, it might have been my ISP, so I tested my desktop, it was still getting info at speeds around 10 Meg. So then I checked out the trouble shooting guide in the users manual. It had a ton of suggestions on where to place the time capsule for optimum performance. I thought, well it always worked fine here before, but for arguments sake I'll try it. So I moved the time capsule to a location that was much more ideal according to the users manual, and... nothing... still 2 Meg speeds. It's really ******* me off, because when I go to purchase or rent a movie on my AppleTV it takes FOREVER to download, and sometimes I'll start a movie, and it stops half way through because my playback has caught up to the end of the download. This NEVER happened before, so if anyone has any suggestions... please help.

HH3 slows down network speeds

Not long ago I decided to upgrade from HH2 to HH3. I have a home network where the wired component utilises Western Digital power line devices. I have a network storage device which holds primarily music files. I regularly transfer music files around the network. Not long after installing the HH3 I noticed that file transfers were taking far longer than ever before. I used LAN Speedchecker to discover that the network speed had dropped to around 10% of previous norms. Power cycling of the HH3 solved the problem temporarily but it soon returned. Switching back to HH2 the problem disappears completely. Any suggestions as to why the HH3 may be creating the network speed issues ?

Hi Bob,
Sounds as if you might have fallen fowl of the confused hub syndrome - where the 3 x 100/10 Mb ports on what appears to be quite a few HH3A's (there is a thread not far down the speed/connection list all about it) switch between 100 and 10 Mbps..
I had a network similar to you, but all wired - my main computer connected to the gigabit hub and a 100mb port feeding a network switch that had back up hard drive - printer server and assorted others.
I found that my computer couldn't talk to the back up hard drive - this was down to the gigabit port only allowing an upload speed of 2Kbps(not a typo!). I also saw that the 100 Mbps port was sometimes only connecting at 10 Mbps.
A good point to see what connection has been made is the devices option on the HH - clicking on a device shows that info.
Not sure if this "feature" is on the new HH3B or not.
Hope this helps
Michael

Networked Database speed issue...

I apologize... I am kind of new to programming and have a limited scope of understanding when it comes to databases and sql queries. I was given the task of creating an application to perform a sorting algorithm and implemented it using LabVIEW 2013, the database toolkit, and a MS Access 2007 database. The application I wrote worked great when it was first deployed and now that it has been operational for about 2 months, it has slowed significantly. I did some testing and I think I have isolated the latency to network communication issues.
I believe it is network speed/traffic related because I copied the database locally and sorting was only about 2s - the networked copy takes about 14s!!! Also, the number of users had no impact on this number either - I created a copy of the database, renamed it, saved it to the same folder, pointed my application to that file instead and it was still 14s... The only noticeable improvement was using a local copy, which will not work for this scenario.
I spoke to a few people about it and someone suggested changing the cursor location from server based to client based (http://msdn.microsoft.com/en-us/library/windows/desktop/ms676564(v=vs.85).aspx). Only thing is, I cannot figure out which LabVIEW is using or how to change it... Is it changeable? If not, do you have any other suggestions for speeding it up? It is unlikely I will get much support from our IT department, so any improvement suggestions will have to be recommendations for change to my application.

I suppose I should have been more clear when I said sort...lol. The application is used to find a PO for a particular device (sorting to a PO). There is only one sort operation (a->z) performed in any of my sql queries (see below)
I was concerned about using the database as well - mostly because I'm not as experienced using them... The original implementation of the application used text files and flags to prevent data collisions, but we have about 10 people sorting at one time and it was creating a huge lag time.
The network location of the database (we believe) is probably what is causing most of the issue. Our IT dept keeps things very locked down and there weren't many choices for implementation methods. I was forced to use a shared folder on the network to store the database and this shared folder is accessible to everyone in our facility. Be believe the general traffic to this server is probably most of the issue we are having.
when the version 2 sort tool was deployed (the one using the database instead of text files) it took just a few seconds to return a result - on the order of 3-5s. There are now over 150,000 entries in the database, so I'm sure that too is contributing to the lag.
The database has several tables:
(1) Log Table: used strictly for logging the device sort data,
(2) Liquidation Table: lists all of the possible sort locations and the device requirements for each PO,
(3) Activity Log - used for capturing devices which shouldn't be sorted or other device condition based exceptions,
(4) Allocation table - for each model it lists whether the device should be sorted to a PO based on the priority of the PO or an allocation percentage, and
(5) Requirements table - only 3 entries. Used to control specific behavior of the sort.
I have several SQL queries in the code that hit this database...
1. Check the requirements table. The flags reside in the table to (1) stop the sorters from being able to sort devices temporarily and (2) a flag to force all devices to be cleared and/or graded before they can be sorted.
SELECT Requirements.Requirement, Requirements.Enable FROM Requirements
WHERE (((Requirements.[Start])<Now()) AND ((Requirements.[End])>Now()));
2. Check the log to see if the device was already sorted - if it is, it flags that log entry so it is not counted against a PO and can be resorted.
SELECT ID FROM LQD_Log
WHERE PO_ID > -2 AND ITEM_ID ='[ITEM ID]'
If not null, a case statement updates the PO_ID for that log entry to a value that will not count against any open POs.
3. The next query is a little more complicated. Depending on the device condition, several case statements build the SQL query string to find a PO the device can be sorted to. Since there could be multiple POs returned, I have it return the POs (at most 5 or so) sorted by priority. (there are 13 elements for each PO returned).
4. The next query checks the allocation table to see if the that model is to be sorted based on priority of the PO or by an allocation percentage.
SELECT Percent FROM Allocation_Table
WHERE CNN ='[COLOR NEUTRAL NAME OF DEVICE]'
A PO is selected in my LabVIEW code based on the POs returned and the allocation method.
The PO (Sort location) is displayed to the user. they scan the sort location and then I write the information to the log in the database - Pertinent device characteristics related to the sort decision, PO Information, user information and scanned location (21 elements).
There is very little which can be done about the location of the file... it has to be in a shared location, and it has to be able to support multiple user access. One of the programmers here recommended using an Access database for this reason and many others. I could possibly lock it down with flags again, but I'm afraid that would only contribute to the problem - I did test a copy of the database to the same network location and I saw the same types of delays, so I really do not believe it is related to multiple users accessing the file.

EA4500 – Smart Wi-Fi interface and Windows Network Map issues

I purchased this Router about 2 weeks ago as a phased upgrade of our Home Network, primarily to enhance media streaming. It has the latest firmware preinstalled from the factory. Prior to the purchase and installation of the EA4500 Router I replaced my old Motorola SurfBoard SB6120 DOCSIS 3.0 Cable Modem with a Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem. My old Linksys E2000 Router worked perfectly with the SB6141, with the exception that the E2000 wasn’t IPv6 enabled, but does have 10/100/1000Base-T Ethernet (RJ-45) and Internet ports.
The EA4500 has been installed for about 10 days and seems to have improved local network speeds and I don’t seem to be having any Internet connectivity issues. However, there are some disturbing issues with the EA4500 and the AE3000 I purchased. There are 11 devices connected through the Router; a Dell Desktop (wireless with the AE3000), a Dell Desktop (Ethernet), a Dell Laptop (wireless), 2 Canon Printers (1 Ethernet and 1 Wireless), 2 Western Digital 1TB MyBookLive Network Drives (both Ethernet), a WD TV Live Streaming Media Player (wireless), an Apple TV media player (wireless), an iPad (wireless), and an Android Smartphone (wireless).
Issue 1 – The Linksys Smart Wi-Fi interface appears to be unreliable at times!!! I’ve read about this problem here on the Community involving the EA6500, so I don’t know if this is a Linksys Server issue, as suggested in a few responses, or a bug in the Router firmware, or defective hardware. However, when the interface locks up, it can’t be accessed from a wireless or wired connection. Usually, powering down the Router and then powering it back up and restart will allow it to function again. However, at times before the interface completely locks up it shows either just a white screen or the security screen will show no firewall features enabled. This is a little scary, so I’ll do a complete reset and setup; this is becoming a pain in the rear!!!!! Is there any hope for this being fixed, in this Router, not the next generation??????????
Issue 2 - All of my network devices show up in the Router’s Device List. Except for the Apple devices they also show up, when they are online, in Windows 7 Explorer under Network and when you click on Network they are correctly displayed as Computers, Media Devices, Network Infrastructure, or Storage. However, when you click on “Open Network and Sharing Center” and then click on “See Full Map”; it fails with the response “Windows cannot create the network map. Responses from other devices on the network are delayed or there is an incompatible router on the network”; no device map is shown. When I follow the link for more information, the only thing that stands out is “A device on the network, such as a hub or switch, is not working properly or is not compatible with the Link Layer Topology Discovery (LLTD) protocol, which Windows uses to create the map. To fix this problem, disable the device, turn it off, or remove it from your network”. All of my network devices showed up on the Network Map with the old E2000. This issue is the same on all of my computers, either wired or wireless. Any known solutions for this, or is it as Windows suggests; an incompatible Router????
Thanks in advance for any insight or solutions. With the issues I’m having with the EA4500 and the AE3000; they are both probably going back to Amazon.

thebluemamba_24; Thank you for your suggestion; I finally found time yesterday to perform an extensive evaluation before I return the Router. However, rather than trying to add devices manually, my rationale was if the EA4500 can’t process them correctly, automatically, it needs to be returned anyway, so I added devices normally letting the device an Router handle the process.
In thinking through this issue, all devices on our network are detected and identified by Windows Explorer on Windows 7 computers; except of course the Apple and Android devices (Apple TV, iPad, and Smartphone). So, I wondered if one of those three devices being added to the Router’s device list was somehow causing issues or interfering with Windows 7’s ability to generate a Network Map. Therefore, my approach was to turn off or disable all devices on our network, reset the Router to factory defaults, reestablish the Router to my custom Home Network configuration using a Windows 7 PC that has LAN and Wireless access to the Router, then add one device at a time and check with each addition to see if Windows 7 could still generate a Network Map.
With the Router reset and reestablishment complete; I began the process of adding one device at a time and checking to see if a Network Map was being generated. What I discovered was when a recent addition to the network, a Western Digital WD TV Live Streaming Media Player, was connected (wirelessly), Windows 7 could no longer generate the Network Map and the failure was consistent. The only way to get the Network Map to work again was to remove power from the WD TV Live, although it remained in the EA4500’s Device List; simply turning it off didn’t help. Since I’d originally witnessed the Windows 7 Network Map working with the Linksys E2000 Router that the EA4500 replaced, I decided to test the WD TV Live with that Router. It worked initially, but it failed consistently after the first success. Interestingly, the failure indication was a little different, but nevertheless generation of the Network Map failed.
I’ve tried changing a few settings on the EA4500 as well as the WD TV Live, but nothing helped. There was a recent firmware update to the WD TV Live, so I might try rolling back the firmware to see if it makes a difference.
The Network Map issue might very well be an issue with the WD TV Live, not the Router, but after reading many threads on this Community I have reservations that the problems I’m experiencing with the Smart interface lockup will be fixed. I suspect new emerging replacement products will be the focus and these older products will be abandoned and no more firmware fixes will be forthcoming and I don’t want to spend more money for a new product just to fix old problems and get something that works properly. The Network Map issue is troublesome, but the lockup of the Router’s “Linksys Smart Wi-Fi” interface is a serious matter to me. It appears that once it locks up, the only way to correct it is a power off restart; not practical if you’re traveling and trying to access settings remotely; the selling point for this feature.
Given the problems I’m experiencing with the EA4500 and AE3000, I guess I’ll return them. Too bad, because otherwise the EA4500 seems like it’s a good Router. I’ve been brand loyal since the Linksys WRT54G came out, but after reading this Community and with my personal experience with the EA4500 and AE3000, now I’ll probably give the NETGEAR N900 equivalents a try.

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.

Home Hub 3 Speed Issue

Some 6 weeks ago I had an issue with losing my internet connection completly, and eventually after a long session with the help desk I magaged to reconnect using the direct port on the main phone socket. However since then I have had a speed issue and Ive been only getting speeds in the order of 2.3Mb.
However running the BT speed test tells me that the connection to my Home Hub 3 is running at 8.13Mb, but the connection to my computer is running at 2.18Mb.
I have tried every thing I can think of. Followed all the advice to improve the connection but nothing works. Reseting the Home Hub, reseting the factory defaults. I've closed down every program running in the background, disconnected the rest of the hardwired network, fitted a new shorter cat 6 cable. All to no avail. The speed still stays firmly at 2.18 to 2.15. down and 0.37 up.
Could their be a fault with my Home Hub?
Thaks for any advice.
Roy
Solved!
Go to Solution.

23:38:00, 29 Jul.
( 5932.320000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:37:29, 29 Jul.
( 5901.890000) CWMP: session closed due to error: No response
23:37:28, 29 Jul.
( 5900.920000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:37:28, 29 Jul.
( 5900.910000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:37:28, 29 Jul.
( 5900.480000) CWMP: Initializing transaction for event code 4 VALUE CHANGE
23:37:24, 29 Jul.
( 5896.840000) DSL is down after 2 minutes uptime
23:37:24, 29 Jul.
( 5896.840000) ETHoA is down after 2 minutes uptime
23:37:24, 29 Jul.
( 5896.200000) PPPoA is down after 2 minutes uptime [Waiting for Underlying Connection (WAN DSL - Up)]
23:37:20, 29 Jul.
( 5892.820000) PPP LCP Send Termination Request [User request]
23:36:35, 29 Jul.
( 5847.820000) CWMP: session completed successfully
23:36:34, 29 Jul.
( 5846.940000) CWMP: HTTP authentication success from https://pbthdm.bt.mo
23:36:32, 29 Jul.
IN: BLOCK [16] Remote administration (TCP [116.10.191.167]:6000->[81.154.29.9]:22 on ppp0)
23:36:32, 29 Jul.
( 5844.670000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:36:32, 29 Jul.
( 5844.660000) CWMP: Session start now. Event code(s): '6 CONNECTION REQUEST,4 VALUE CHANGE'
23:36:32, 29 Jul.
( 5844.050000) CWMP: Initializing transaction for event code 6 CONNECTION REQUEST
23:35:08, 29 Jul.
( 5760.150000) CWMP: session completed successfully
23:35:07, 29 Jul.
( 5759.850000) CWMP: HTTP authentication success from https://pbthdm.bt.mo
23:34:55, 29 Jul.
( 5746.980000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:34:55, 29 Jul.
( 5746.970000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:34:48, 29 Jul.
( 5740.780000) PPP IPCP Receive Configuration ACK
23:34:48, 29 Jul.
( 5740.580000) PPP IPCP Send Configuration ACK
23:34:48, 29 Jul.
( 5740.580000) PPP IPCP Receive Configuration Request
23:34:48, 29 Jul.
( 5740.290000) PPP IPCP Send Configuration Request
23:34:48, 29 Jul.
( 5740.290000) PPP IPCP Receive Configuration NAK
23:34:47, 29 Jul.
( 5739.870000) PPP IPCP Send Configuration ACK
23:34:47, 29 Jul.
( 5739.870000) PPP IPCP Receive Configuration Request
23:34:47, 29 Jul.
( 5738.990000) PPP IPCP Send Configuration ACK
23:34:47, 29 Jul.
( 5738.990000) PPP IPCP Receive Configuration Request
23:34:45, 29 Jul.
( 5737.420000) PPP IPCP Send Configuration Request
23:34:45, 29 Jul.
( 5737.410000) WAN operating mode is DSL
23:34:45, 29 Jul.
( 5737.410000) Last WAN operating mode was DSL
23:34:43, 29 Jul.
( 5735.310000) PPPoA is up - VPI: 0, VCI:38
23:34:43, 29 Jul.
( 5735.290000) CHAP authentication successful
23:34:43, 29 Jul.
( 5735.260000) CHAP Receive Challenge
23:34:43, 29 Jul.
( 5735.250000) Starting CHAP authentication with peer
23:34:43, 29 Jul.
( 5735.250000) PPP LCP Receive Configuration ACK
23:34:43, 29 Jul.
( 5735.240000) PPP LCP Send Configuration Request
23:34:42, 29 Jul.
( 5734.110000) PPP LCP Send Configuration ACK
23:34:42, 29 Jul.
( 5734.110000) PPP LCP Receive Configuration Request
23:34:40, 29 Jul.
( 5732.210000) PPP LCP Send Configuration ACK
23:34:40, 29 Jul.
( 5732.210000) PPP LCP Receive Configuration Request
23:34:40, 29 Jul.
( 5732.090000) PPP LCP Send Configuration Request
23:34:37, 29 Jul.
( 5729.230000) ETHoA is up - VPI: 0, VCI:35
23:34:37, 29 Jul.
( 5729.230000) DSL is up
23:34:36, 29 Jul.
( 5728.350000) DSL noise margin: 21.00 dB upstream, 10.90 dB downstream
23:34:36, 29 Jul.
( 5728.280000) DSL line rate: 448 Kbps upstream, 8128 Kbps downstream
23:34:12, 29 Jul.
( 5704.670000) CWMP: session closed due to error: No response
23:34:12, 29 Jul.
( 5704.640000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:34:12, 29 Jul.
( 5704.630000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:33:42, 29 Jul.
( 5674.150000) CWMP: session closed due to error: No response
23:33:41, 29 Jul.
( 5673.000000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:33:41, 29 Jul.
( 5672.990000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:33:40, 29 Jul.
( 5672.560000) CWMP: Initializing transaction for event code 4 VALUE CHANGE
23:33:36, 29 Jul.
( 5668.110000) DSL is down after 92 minutes uptime
23:33:36, 29 Jul.
( 5668.100000) ETHoA is down after 92 minutes uptime
23:33:35, 29 Jul.
( 5667.670000) PPPoA is down after 92 minutes uptime [Waiting for Underlying Connection (WAN DSL - Up)]
23:33:32, 29 Jul.
( 5664.200000) PPP LCP Send Termination Request [User request]
23:29:51, 29 Jul.
OUT: BLOCK [7] ICMP replay (ICMP type 3 code 1 81.153.31.203->69.171.248.65 on ppp0)
23:28:50, 29 Jul.
( 5382.020000) CWMP: session completed successfully
23:28:48, 29 Jul.
( 5380.950000) CWMP: HTTP authentication success from https://pbthdm.bt.mo
23:28:46, 29 Jul.
( 5378.860000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:28:46, 29 Jul.
( 5378.850000) CWMP: Session start now. Event code(s): '6 CONNECTION REQUEST,4 VALUE CHANGE'
23:28:46, 29 Jul.
( 5378.230000) CWMP: Initializing transaction for event code 6 CONNECTION REQUEST
23:26:03, 29 Jul.
( 5215.090000) CWMP: session completed successfully
23:26:02, 29 Jul.
This is some of the event log.

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

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!

Network speed WAY down for internet - help??

I have 3 airport extreme's set up as a WDN. It all works great. Internet is fast through a cable modem attached to the main stations WAN port.
It seems though that when "certain" users are getting into heavy internet traffic, seemingly large continuous downloads, the REST of the network is slowing down. The internet slows down to a CRAWL, so much so that eventually safari brings up the "network troublshooting" thing.
What is perplexing about this is that when I try to remote desktop to another machine on the LAN, THIS TOO has slowed to a crawl! There are no other LAN transfers or interactions between machines going on, ONLY NAT/DHCP net access.
I KNOW it is other users, because when I disconnect the internet, the network speed instantly goes back to super fast, remote desktop works great etc, then it seems somebody is starting their download again (ha ha that I just disconnected) and suddenly it's crawling. This doesn't seem right, not with only 3 - 5 users on a 3 base station system, and a 1Mb/s internet cable connection.... does it? At least, if the internet is slowing down, other LAN traffic (non internet related) should not right?? This is the part that has got me confused.
Also is there any software out there that will let me see stats from the main station in regards to:
- DHCP LAN assignments
- and upload / download traffic of each of those LAN addresses and other information.
Thanks,
Miklos.
PS Just to be clear when the internet is extremely slow it is not one particular site - email doesn't work, and the same site, reloaded again and again does not load - the rest of the network is simultaneously slow - I disconnect the internet (log off via simple software app supplied by the ISP) and within 5 - 10 seconds, network speed is visibly up - things start loading properly, and the internet - the same site, starts to load very fast.
My dilemma is how can the internet usage slow the REST of the network, when it's a very fast system! Another point: I am NOT resetting the base stations, they are remaining online and nobody is getting bumped off, I'm only disconnecting the internet feed that's ALL, so it's not like they're getting kicked off and then network speed is resuming, they are still in effect logged on to the network, they just can't access the internet.

Did you run it in store? If so, the wireless instore is notoriously bogged down/slow with all the things connected to it.
If you like my post, or solution to your issue/question, go ahead and click on the little star by my name and/or accept the post as the Solution. It makes me happy.
I'm NOT an employee of Best Buy, or Geek Squad, though I did work as an Agent for a year 5 years ago. None of my posts are to be taken as the official stance that Best Buy will take on your situation. My advice is just that, advice.
Unfortunately, that's the bad luck of any electronic, there's going to be bad Apples... wait that's a horrible pun.

Slow Networking Speed

Hey,
I am getting some problem with the Internet on my virtual machine. I tested the speed with speedtest-cli tool, its showing me
Download: 26.03 Mbit/s
Upload: 13.28 Mbit/s
but the actual speed i am getting is :
100 - 200 kbps as downloading
and upload speed is also very slow.
how can i get the fast internet speed???
kindly resolve this issue.
Thanks in advance.

Hello Hemant Thakur,
1. What is the size of the Virtual machine that you have deployed on Azure?
There could be several reasons that the VM has a network performance issues. To check if there are any issues on the platform end, I suggest that you try the steps below:
I suggest that you restart your Virtual Machine to see if it makes the difference. You can do this by logging into your Virtual Machine or from the Azure Management portal.
If this does not work, I suggest that you resize your Virtual Machine. You can refer to the link below that will give you information on how to accomplish this:
https://msdn.microsoft.com/en-us/library/dn168976(v=nav.70).aspx
If these steps do not work, we might have to further invertigate this issue. I suggest that you create a Support ticket with us. You can follow the link below to create a Support ticket:
http://azure.microsoft.com/en-in/support/options/
Thanks,
Syed Irfan Hussain

MacBook Air 2010 network speed drop sharply after download starts

My MBA 2010 started having network issue a few month ago. The symptom is:
1. Sometime, the network speed (both in and out) drops to 0B/sec suddenly and all connection died, then comes back after a few sec.
2. When downloading large files, the initial download speed was great, 2MB/s, but sharply dropped to 20KB/s after a few sec. And never increase.
I have another MacBook Pro on the same home network. Never had such issues with it. I also tried to download the same file from both machines at the same time or one after another. No matter which way, my MBP can consistently have 2MB/s speed, but my MBA only had 20K/s.
I had this issue with MBA when it was running snow leopard. And I thought it may deal with OS. So just upgraded to Mountain Lion (clean install). But still the same issue.
But when speedtesting with www.speedtest.net, MBA still works pretty good, 18mbps download, 4mbps upload. This really confuses me. I begin to suspect if my airport adapter is broken or getting flaky. Any help or suggestion will be appreciated.

Ok, when I take the MacBook Air into the room with the Airport Express the Internet Connection works well and the Airport Utility shows the Phy Connection as 802.11 a / n as opposed to 802.11 b / g / n
Does this tell me anything about why when connected to the Network via the Airport Express that I am having trouble connecting to almost any URL? Sometimes it connects but very slowly. When I do get through to the Speedtest things look Ok but with some serious valleys in the graphic.

Network speed issue

Similar Messages

Maybe you are looking for