linksys WRT54G v4 Speed limit

Discussion in 'Cisco/Linksys Wireless Routers' started by Anonymous, Feb 14, 2006.

  1. Anonymous

    Anonymous Guest

    linksys WRT54G v4 Speed limit is 54 Mbps.

    But, the 4 ports(wired) of WRT54G is 10/100 Mbps switch port.

    And why can't I use the Internet at 100Mbps ?

    My Internet speed is 90Mbps without linksys router.

    25Mbps with linksys router + DD-WRT v23 (firmware)

    52Mbps with linksys router + v4.30.1 HyperWRT 2.1b1 +tofu13c (firmware)

    54Mbps with linksys router + original firmware Version v4.20.8

    Is that hareware limit? Or software?

    I know some high speed routers below the price of linksys but it's very unstable. (85Mbps on my PC)

    You can check the result of my test (
  2. NateHoy

    NateHoy Network Guru Member

    The WRT54G V4 is a solid Linux box running a 200 mhz processor. Your tested numbers are actually higher than numbers I've seen elsewhere, some reports are as low as 15mbps.

    You are running firmly into a hardware limitation. This is a *consumer* router. For your speeds, you need something much bigger and more expensive, or you can get an old PC and load up M0n0wall, Smoothwall, IPCop, or any one of a dozen open source firewall packages.
  3. Anonymous

    Anonymous Guest

    Thank you for your answer.

    More Informations:
    It's not a wireless connection speed.

    Wireless connection speed is 15~19Mbps (You're right.)

    It's the wired connection speed with the port of WRT54G.

    And another tested router is sitecom WL-143 Wireless Network Router.

    It uses CX86202 CPU (180mhz). It's consumer router,too.

    But, sadly it's not stable in really high speed.

    It can't stand long time in my test.

    Perhaps TCP stack or linux kernel can be optimized.

    I heard that linksys new router WRTH54GS is very fast and stable.
    ( )

    I can buy this product in my country now.

    But a little expensive ($100 US) and I bought WRT54G a month ago.

    I don't know what cpu type is used in WRTH54GS.
  4. NateHoy

    NateHoy Network Guru Member

    Most of the reports I've seen (and there aren't many of them, since connections over 15mbps are few and far between in the consumer space) have reported about ~15-16mbps throughput on the WIRED side of the router (WAN connection).

    I'm pretty sure everything on that little box is optimized already.

    Never run into the WRTH54GS, and I don't know what hardware or OS it is based on, but if it lives up to the marketing blurbs it night be worthwhile for you.
  5. t4thfavor

    t4thfavor Network Guru Member

    make sure QoS is off its been weird on that box with all the firmwares. ethernet standard has a bit of overhead that will take away from your actual performance. as well as when the usage of an ethernet cable gets in the range of 70-90% then you get collisions and dropped packets.

    you will need to get a faster more capable router

    I work for the General Motors Network Engineering Center and I kinda know what im talking about when i say that your internet speed will lie to you.

    Edit: the ipcop/moonwall sounds like a killer solution for you. and then use your wrt as an ap only.
  6. Anonymous

    Anonymous Guest

    If firmware is optimized, the removal of TCP overhead would be the reason why another router is faster but unstable.

    Until last year linksys router was no problem at all.

    But, my ISP upgraded the Internet service with 100 Megabits per second for the same price because of new ISP. Before upgrading the service my Internet speed was 3.5Megabits per second. (ADSL Light service)

    I think I should wait until a new router comes.
  7. t4thfavor

    t4thfavor Network Guru Member

    most things on the net can not serve that fast anyways so you shouldnt notice much difference
  8. NateHoy

    NateHoy Network Guru Member

    You cannot remove "TCP Overhead". That is things like acknowledgments, packet headers, etc. Remove those and you have a bunch of disorganized data that doesn't know where to go, or whether it got there.

    A jump from 3.5 to 100 would most certainly push you past the speed limit of that router. The question now is, do you need the full speed? If you do, you'll need far more serious hardware than a 200 megahertz processor in an embedded device. Even with the SPI firewall turned off, simple routing is going to overwhelm that processor if you get anywhere NEAR 100mbit.

    So, you can put up with the "slow" speeds that are more than an order of magnitude faster than most of us could dream of, or you could take an old PC and load up M0n0wall, Smoothwall, IPCop, or whatever, pick up a cheap switch or use the WRT54GS as a switch, and call it a love story.

    Or you can send me your WRT54GS and I promise to find it a good home. (grin)

    Seriously, I wish I had your problem. (grumbles) 100mbit connection and he complains that he can "only" get 50mbit, when the rest of us are stuck at under 5mbit. (kidding!)
  9. Anonymous

    Anonymous Guest

    Actually I feel no difference at all (between 3.5 Mbps and 90Mbps. Web page loading or real time streaming or downloading the file from abroad…etc)

    Except I send big files to another 100Mbps users and use Edonkey2000 and download from some fast server.

    Thank you for your advice.
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