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  1. #1
    Untangler swmspam's Avatar
    Join Date
    Mar 2008

    Default Ethernet: Mbps (10/100) vs. Gbps (10/100/1000)

    My Untangle boxes use Gbps (10/100/1000) ethernet ports. I was wondering if this was necessary, so I did some work.

    Obviously, the WAN port can be 10/100, because the WAN itself operates a maximum of 5-6Mbps. That leaves the DMZ and LAN ports to worry about. Our system is currently using UT in transparent mode, with m0n0wall handing the routing, so we'll look at that, too.

    Running the LAN in Gpbs (10/100/1000) mode doesn't buy any speed advantages. (In reality, it is not really Gbps, because the PCI 33MHz speed limitation. PCI-E or PCI-X hardware with an advanced chipset can actually clock true Gbps speeds.)

    The LAN is useful for high speed only when accessing the UT internet cache. Otherwise, the Gbps offers very little real-world speed advantages, because the speed bottleneck is the WAN throughput.

    However, the DMZ offers reasons to use Gbps. If you're using a pinhole to reach the DMZ from the LAN, Gbps will give faster DMZ/LAN file transactions. It depends on how often you access your DMZ from the LAN if this is useful to you.

    So, my conclusion:

    WAN: just fine using 10/100 hardware
    LAN: 10/100 hardware satisfactory
    DMZ/LAN: 10/100/1000 hardware desirable if lots of LAN to DMZ transactions through a pinhole

    agree? disagree?

  2. #2
    Join Date
    Jun 2008



    we're still on a 100 LAN for our network... we were thinking about going GB for the new network...

    Is your GB LAN totally GB certified.. ie is every piece of hardware equipped with GB, including switches and hubs... and is your cabling GB certified..

    these could also bottleneck your speeds..

  3. #3
    Untangle Ninja sky-knight's Avatar
    Join Date
    Apr 2008
    Phoenix, AZ


    GB to the desktop is foolish unless you're dealing with a graphics department. I have been using GB between servers and to the switch for a couple years now and that provides a significant performance boost.

    Think of it this way, if your server has a 100mbit link to the switch all your clients are sharing that 100mbit. So if you have 10 clients accessing said server at once immediately their individual theoretical bandwidth is 100/10 = 10mbit.

    Now swap that switch out with a decent switch that has a few gbit ports on it and move that server up to 1000mbit and now the math is 1000/10 = 100mbit. You give a 10 user lan full 100mbit access to their files and they will love you for it. This upgrade is really inexpensive as well.

    That switch is cheap and it works really well for small biz and even mid biz if it is placed correctly.
    Rob Sandling, BS:SWE, MCP
    Phone: 866-794-8879 x201

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