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wrt54gl speed - want your opinion

Discussion in 'Cisco/Linksys Wireless Routers' started by qarews, Jan 27, 2007.

  1. qarews

    qarews LI Guru Member

    hi all

    my test config:
    router vrt45gl 1.1 - tomato 1.04 firmware
    wifi laptop card intel pro/wireless 3945abg

    after lots of tests and optimizations i am wondering
    my maximum WLAN speed is 29Mb/s flat out graphs and stable

    where is the limitation in achieving more?
    as the router is called wrt54gl ...
    where are the 36, 48, 54 standards?:rolleyes:

    why is it not called wrt24gl
    in what conditions can the 54 be achieved?

    just waitin for some opinions

    :)
    CPU Load (1 / 5 / 15 mins) 0.43 / 0.50 / 0.30
    Total / Free Memory 14.18 MB / 3,644.00 KB (25.10%)
    :):)
    LAN 2 LAN tops at 100mbit/s flat out
    WAN test made 2 feet away from the router 75-80 quality
    -96db noise floor

    PS: have tested in almost every way , even without encryption
    ; also disabled logging, qos .. telnet .. dhcp .... all
     
  2. swinn

    swinn Network Guru Member

    You fail to take in account the overhead. You won't see 54Mbps speeds and your 29Mbps is pretty darn good. On an all-G network it will be mid-20's on average and on a mixed B/G network it will be much lower. Encryption will lower it some as well.
     
  3. ka9yhd

    ka9yhd LI Guru Member

    Also what type of connection to the Internet do you have? If it is a DSL line with PPPoE this will also slow things down a bit.

    When using PPPoE the PPP packet is encapsulated inside the eithernet packet and must be disassembled and put back together in the correct order, and this uses some cpu overhead.
     
  4. qarews

    qarews LI Guru Member

    yup, so i should be happy :)

    frame burst enabled on router
    throughput enhancement enabled on wifi card

    done some more tests
    very little difference between encryptions [about 28-29Mbps for all]
    wep i lose only 100kbytes/s
    wpa2 i lose only 150-200kbytes/s

    also tested on my kitchen 2 brick walls away [10 meters]
    about the :eek: same speed [another 100kbytes/s lost]

    i have cable-modem connection 4mbps
    only tested this for file transfers

    wouldn't it be nice to actually go to 54 as the router states :biggrin:

    btw what is this overhead you refer to?
     
  5. ka9yhd

    ka9yhd LI Guru Member

    Overhead is cpu usage.
     
  6. ifican

    ifican Network Guru Member

    The 54 you see in the name is because it lives up to the 802.11g standard. It has been shown many ways over that all of the wrt lines see a maximum throughput of roughly 30Mbps. Overhead is just that, any data needed to take what you want to send and get it there reliably to somewhere else, (data is encapsulated many times over to get it where its suppose to go). And thats not counting ecryption as stated, which adds more overhead. As stated on a 100Mb network you will see about 75mb maximum throughput on the inside and thats just a plane jane network with no other limiting factors.
     
  7. qarews

    qarews LI Guru Member

    ah
    now i see this is a good speed

    but do you thing the cpu is the real limitation
    does this mean the router cpu is used at it's full potential?

    lan 2 lan goes up to 100 really ... ok maybe 99.8
    100 it's a standard ... right
    so 54 is also a standard ... am i not right? .. well it seems not really

    i will test wan to lan and wan 2 wlan .. and see

    all this things are just arghhhhhh
    1 same situation with the lcd response time ...
    2 same situation with some DVDs+/-R/RW [not all]
    3 same with the cellphone battery life
    [well 2 ad 3 are questionable but 1 is exactly the same as wireless speed specifications]


    do not get me wrong, i like my router
    but i just want to see other peoples opinions, and i want to ... voice my concerns
    marketing marketing marketing .... and all the user gets are some not achievable numbers
    and this is from linksys ... well, what can we expect from no names? or other not so good brands
     
  8. qarews

    qarews LI Guru Member

    i have read more on the net

    the reality is that 54 is the signaling rate not the transfer rate ...

    so yes 54 is a standard ... but it;s just the way the measuring is done
     

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