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Wireless Bandwidth and dropped packetsappreciative. In moving large files...of any kind...of 100MB or more across my two computer home wireless network, the recieving PC sooner rather than later drops it network connection. I have a wireless Linksys router and wireless linksys cards using the N draft protocols. Signal to noise is great and "bandwidth" is over 250Mb/sec. According to Linksys, that extra bandwidth buys me nothing. I get a range improvement, but the transfer protocols (layers?) have not scaled. Lots of small files move faster than one large file. Either the internal bus speeds in the PCs are limiting what I can transfer, or some setting may be wrong. I download from a cable connection through the router and can download in excess of 20Mb/s...pretty swift. It all gets pokey beyond that. Linksys talks about packet collisions but has no specific way of fixing things other than to "slow" the rate down to avoid collisions and thereby improve throughput. Huh??? Any ideas that an ignoramous can understand? Thanks Henry Hi
Did you actually measured 250Mb/sec. (I.e. real file transfer of about 30MB/sec.) or you reporting what the Driver Report statically by default? These pages include some general info about the issues. http://www.ezlan.net/net_speed.html http://www.ezlan.net/Internet_Speed.html With some Wireless this issue is irresolvable due to quirky hardware driver combo. However you can try to increase RCwin to x2 times of what is recommended for your Internet Connection, it might help. Use this application to optimized the TCP/IP stack and deal with RCwin. TCP Optimizer - http://www.speedguide.net/downloads.php P.S. While I am aware that you are talking about Local Transfer the TCP/IP has to be optimized according to the Internet connection otherwise you would lose Internet bandwidth. Doubling the RCwin might improve Local Transfer and usually do not affect the Internet connection (YMMV). Jack (MS, MVP-Networking) <HLAMUTHNOSPAM@EARTHLINK.NET> wrote in message Show quoteHide quote news:e4udi4pfrv86utlmk90ssovlipjna9sg4k@4ax.com... > If someone could enlighten me on the following, I would be > appreciative. In moving large files...of any kind...of 100MB or more > across my two computer home wireless network, the recieving PC sooner > rather than later drops it network connection. I have a wireless > Linksys router and wireless linksys cards using the N draft protocols. > Signal to noise is great and "bandwidth" is over 250Mb/sec. > > According to Linksys, that extra bandwidth buys me nothing. I get a > range improvement, but the transfer protocols (layers?) have not > scaled. Lots of small files move faster than one large file. Either > the internal bus speeds in the PCs are limiting what I can transfer, > or some setting may be wrong. I download from a cable connection > through the router and can download in excess of 20Mb/s...pretty > swift. It all gets pokey beyond that. Linksys talks about packet > collisions but has no specific way of fixing things other than to > "slow" the rate down to avoid collisions and thereby improve > throughput. Huh??? > > Any ideas that an ignoramous can understand? > > Thanks > > Henry The wireless management client reports this...the popup context window
with the network icon in the tray. I did mean megabits. It is the potential bandwidth. The "real" transfer bandwidth must be much smaller. I understand the basic notion of network management, but I don't really know how the home networks work. In the olden days, with mainframe network management, when traffic took up about 70% of the available bandwidth, management issues slowed throughput to zero. It is how the information flow scales...not truly bandwidth in an electronic sense. I will check your links and see if they enlighten me. Like I mentioned, it isn't download speeds, it is transfer speeds. I can download to either computer at up to 20 Megabytes/sec but if I take a large file and move it from one computer to the other, the rates drop to...lets see...250MB in 2 min...that is maybe 1.5 - 2 MB/sec transfer rate...maybe ten times slower than I might expect an unused link to handle. It isn't as though there is a lot of contention for bandwidth...or maybe there is. I have tested the transfer speed by turning off my security and virus protection on the network pc's and all other applications including downloads. The rate is just pegged at the ~1.5 MB/sec. Seems slow to me. Henry On Fri, 21 Nov 2008 16:14:15 -0500, "Jack \(MVP-Networking\)." <j***@discussiongroup.com> wrote: Show quoteHide quote >Hi >Did you actually measured 250Mb/sec. (I.e. real file transfer of about >30MB/sec.) or you reporting what the Driver Report statically by default? >These pages include some general info about the issues. >http://www.ezlan.net/net_speed.html >http://www.ezlan.net/Internet_Speed.html >With some Wireless this issue is irresolvable due to quirky hardware driver >combo. >However you can try to increase RCwin to x2 times of what is recommended for >your Internet Connection, it might help. >Use this application to optimized the TCP/IP stack and deal with RCwin. TCP >Optimizer - http://www.speedguide.net/downloads.php >P.S. While I am aware that you are talking about Local Transfer the TCP/IP >has to be optimized according to the Internet connection otherwise you would >lose Internet bandwidth. Doubling the RCwin might improve Local Transfer and >usually do not affect the Internet connection (YMMV). >Jack (MS, MVP-Networking) > ><HLAMUTHNOSPAM@EARTHLINK.NET> wrote in message >news:e4udi4pfrv86utlmk90ssovlipjna9sg4k@4ax.com... >> If someone could enlighten me on the following, I would be >> appreciative. In moving large files...of any kind...of 100MB or more >> across my two computer home wireless network, the recieving PC sooner >> rather than later drops it network connection. I have a wireless >> Linksys router and wireless linksys cards using the N draft protocols. >> Signal to noise is great and "bandwidth" is over 250Mb/sec. >> >> According to Linksys, that extra bandwidth buys me nothing. I get a >> range improvement, but the transfer protocols (layers?) have not >> scaled. Lots of small files move faster than one large file. Either >> the internal bus speeds in the PCs are limiting what I can transfer, >> or some setting may be wrong. I download from a cable connection >> through the router and can download in excess of 20Mb/s...pretty >> swift. It all gets pokey beyond that. Linksys talks about packet >> collisions but has no specific way of fixing things other than to >> "slow" the rate down to avoid collisions and thereby improve >> throughput. Huh??? >> >> Any ideas that an ignoramous can understand? >> >> Thanks >> >> Henry I don't seem to have a reason for a slow network. I downloaded the
optimizer, used it on both PCs, and if anything have a slower transfer rate. I am mystified. I changed the connection speed to reflect my true internet connectivity..which was initially showing as quite low compared to 15-20Mb/sec. I also have no idea what RcWin is or where to find it to check or adjust its setting. Can you help me out there?? Thanks. Henry On Fri, 21 Nov 2008 16:14:15 -0500, "Jack \(MVP-Networking\)." <j***@discussiongroup.com> wrote: Show quoteHide quote >Hi >Did you actually measured 250Mb/sec. (I.e. real file transfer of about >30MB/sec.) or you reporting what the Driver Report statically by default? >These pages include some general info about the issues. >http://www.ezlan.net/net_speed.html >http://www.ezlan.net/Internet_Speed.html >With some Wireless this issue is irresolvable due to quirky hardware driver >combo. >However you can try to increase RCwin to x2 times of what is recommended for >your Internet Connection, it might help. >Use this application to optimized the TCP/IP stack and deal with RCwin. TCP >Optimizer - http://www.speedguide.net/downloads.php >P.S. While I am aware that you are talking about Local Transfer the TCP/IP >has to be optimized according to the Internet connection otherwise you would >lose Internet bandwidth. Doubling the RCwin might improve Local Transfer and >usually do not affect the Internet connection (YMMV). >Jack (MS, MVP-Networking) > ><HLAMUTHNOSPAM@EARTHLINK.NET> wrote in message >news:e4udi4pfrv86utlmk90ssovlipjna9sg4k@4ax.com... >> If someone could enlighten me on the following, I would be >> appreciative. In moving large files...of any kind...of 100MB or more >> across my two computer home wireless network, the recieving PC sooner >> rather than later drops it network connection. I have a wireless >> Linksys router and wireless linksys cards using the N draft protocols. >> Signal to noise is great and "bandwidth" is over 250Mb/sec. >> >> According to Linksys, that extra bandwidth buys me nothing. I get a >> range improvement, but the transfer protocols (layers?) have not >> scaled. Lots of small files move faster than one large file. Either >> the internal bus speeds in the PCs are limiting what I can transfer, >> or some setting may be wrong. I download from a cable connection >> through the router and can download in excess of 20Mb/s...pretty >> swift. It all gets pokey beyond that. Linksys talks about packet >> collisions but has no specific way of fixing things other than to >> "slow" the rate down to avoid collisions and thereby improve >> throughput. Huh??? >> >> Any ideas that an ignoramous can understand? >> >> Thanks >> >> Henry <HLAMUTHNOSPAM@EARTHLINK.NET> wrote in message
news:e4udi4pfrv86utlmk90ssovlipjna9sg4k@4ax.com... There is no such thing as collisions with wireless. The WAP the nics are > swift. It all gets pokey beyond that. Linksys talks about packet > collisions but has no specific way of fixing things other than to > "slow" the rate down to avoid collisions and thereby improve > throughput. Huh??? connected to controls the traffic and "who" can "send" and "when". The Nics (unlike with wired) do not decide "on their own" when to send. So, whatever the problem is,...it is not collisions. These are laptops,...this means there are power-saver features on the nics,...maybe the nics are "going to sleep" and not recovering properly. -- Phillip Windell www.wandtv.com The views expressed, are my own and not those of my employer, or Microsoft, or anyone else associated with me, including my cats. ----------------------------------------------------- Interesting. These PCs are desktops, but I get your point. I have
tried to pause any sleep interuptions like shutting off monitors, etc. The issue seems to be when I try and move a folder and not just the files in it...I get a message about the path being too deep, which tells me it doesn't like folder but then it gags on the files, too. What about RWin...what is it and where do I find it within XP, etc?? Thanks. Henry On Mon, 24 Nov 2008 14:03:32 -0600, "Phillip Windell" <philwind***@hotmail.com> wrote: Show quoteHide quote ><HLAMUTHNOSPAM@EARTHLINK.NET> wrote in message >news:e4udi4pfrv86utlmk90ssovlipjna9sg4k@4ax.com... >> swift. It all gets pokey beyond that. Linksys talks about packet >> collisions but has no specific way of fixing things other than to >> "slow" the rate down to avoid collisions and thereby improve >> throughput. Huh??? > >There is no such thing as collisions with wireless. The WAP the nics are >connected to controls the traffic and "who" can "send" and "when". The Nics >(unlike with wired) do not decide "on their own" when to send. > >So, whatever the problem is,...it is not collisions. > >These are laptops,...this means there are power-saver features on the >nics,...maybe the nics are "going to sleep" and not recovering properly. <HLAMUTHNOSPAM@EARTHLINK.NET> wrote in message
news:ih5mi41et3u5nnrp3sdhfk5712ct8tkcic@4ax.com... Desktops have these features too.> Interesting. These PCs are desktops, but I get your point. I have > tried to pause any sleep interuptions like shutting off monitors, etc. Properties of Network Places Properties of "Local Area Connection" (or however you have it named) "Configure" Button next to Nic Name Power Management Tab "Uncheck" the boxes > The issue seems to be when I try and move a folder and not just the I don't have an answer for that. Maybe it is telling the truth. Maybe the > files in it...I get a message about the path being too deep, path *is* too deep. -- Phillip Windell www.wandtv.com The views expressed, are my own and not those of my employer, or Microsoft, or anyone else associated with me, including my cats. ----------------------------------------------------- 
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