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Thread: LAN help?

  1. #1
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    LAN help?

    need some help with my LAN - got 2 x dlink- DGS-1005D switched , and eveyone has onboard gigabit nic`s (except the wife she`s on 100 base) - the problem is file transfers - they seem to stop at 12 MB/s and dont even creep higher - even when from mine (1gbit) via gigabit switch to NAS (also on gigabit)


    any suggestions ?

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    Does he need a reason? Funkstar's Avatar
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    Re: LAN help?

    edit Google fail :/

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    Re: LAN help?

    would that be disable RDC? doesnt do anything as its for offline files....

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    Does he need a reason? Funkstar's Avatar
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    Re: LAN help?

    I googled "DGS-1005D" but it returned a link to the DES-1005D which is 10/100 so thought that was the problem until I re-read everything and edited the post.

    What NAS do you have? Just because it connects at gigabit speeds, doesn't mean it can actually transfer at that rate, most of them can't.

    What do you mean by "2 x dlink- DGS-1005D switched"?

    How is everything connected?

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    Re: LAN help?

    Well 12Mb implies it's running at 100Mbps rather than 1Gbps, so it sounds like there is a setup error and it's set up for 100mbps.

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    Re: LAN help?

    router is gaeway to internet , connected to the first DGS-1005 via 1 cable , coming off the switch is 3xcat5e cables - 1 is my pc , 1 to xbox and 1 to the second switch upstairs (10 meter run) so 4 of the ports connected.

    coming off the second switch is the Arkura NAS box and the wife and kids pc (3 x cat 5e cables)

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    Re: LAN help?

    Disconnect your switch from your router, power cycle your switches, check the sync speed on your computers.. if it syncs at 1gbps then you can reconnect the switch to the router.

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    Re: LAN help?

    only problem with that is dhcp is assigned from the router by default

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    Re: LAN help?

    Quote Originally Posted by HalloweenJack View Post
    only problem with that is dhcp is assigned from the router by default
    Yeah, I figured that.. but it should still sync the line speed without dhcp, no?
    you can always do a ipconfig /renew afterwards

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    Re: LAN help?

    cycled power on all - both dlink switches are showing `green (meaning 1000base) connections to each other , 1000 base to mine and 100 base to the xbox (orange) , upstairs its 1000 base to the kids pc and arkara nas and 100 base to the wifes pc.

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    Re: LAN help?

    Run a speed test on your network with something like this http://www.passmark.com/products/pt.htm
    I just googled this quickly and it seems to do what you need, there's a 30 day trial on it.

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    Re: LAN help?

    speed test is coming up at

    12MB/s

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    Re: LAN help?

    I'm no network expert, but you're clearly limited to 100 Mbit speeds at some point along the way.
    (12 MegaBytes = 12 x 8 = 96 MegaBits).

    My Netgear Gigabit switch saw a dramatic improvement in transfer speeds between my PC and NAS, from (previously) 11.5 MB/s to (now) around 35 to 45 MB/s. Clearly, you are still limited at some point.

    I'm perplexed that your lights are indicating Gigabit speeds as working (my switch does the same - very handy). This leaves me wondering if there is a software issue somewhere in Windows? (IE everything really is connecting at gigabit speeds in the hardware, but a software layer is then reducing this).
    My other thought was a setting in your Dlink, however since it's a switch then I assume that its simply plug-and-play, with no settings to be able to change. Hmmm. A thinker.
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    Re: LAN help?

    You could try connecting 2 comps directly and testing that way to start eliminating..
    That and having just 2 devices connected to the switch, you can always set up the ip addresses manually and put them in the same subnet if you disconnect your router.

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    Re: LAN help?

    right , today did this:


    router off - dhcp on NAS used , NAS>switch>my pc

    still 10>12 MB/s

    replace cable (and move everything ) with 5m of cat6 - still 10>12MB/s

    both switches show gigabit connected , NAS and my pc show NIC`s are gigabit connected - oh FFS.#


    tried jumbo frame sizes as well.

  16. #16
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    Re: LAN help?

    And you say you get these speeds between machines too (ie so we can rule out that the NAS is a bit of a duffer)?

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