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Maximum DHCP Users Required

Discussion in 'Cisco/Linksys Wireless Routers' started by RickTick, Jan 31, 2007.

  1. RickTick

    RickTick LI Guru Member

    Desktop HP 510n wired
    Laptop Compaq V5101 US Sometimes wired, sometimes wireless
    Network Printer HP C5180 wired
    Router Linksys WRT54G -V6 WPA2 Personal, AES

    On set up/Basic Settings there is a box to input the maximum number of DHCP users.

    Do I need one, two , three or four. for the above described network.

    So that I can learn, would appreciate an explanation as to why/how I need the number required. BTW, did not find any reference in search.

    Forgot to add: The network printer is new and I have tried all three numbers, but seem to get an error message of ip address conflict sometimes, and inability to connect sometimes. Have not been able to relate it to the number of users. Don't know if this is related.
  2. ifican

    ifican Network Guru Member

    Technically you would need 4, reason being the laptop would need 2, one when its wired and one for when its wireless. Anytime you use a different NIC, whether it be wired or wireless you will have to have a different ip. But i would not just limit it to that, you my find a friend or relative comes over and wants to use your connection, you say sure just plug in and forget that you only allowed what you need for you network and then spend the next hour or more trying to figure out why it doesnt work for said friend (i know cause i have done this to myself before). As far as your printer goes check the cable used to connect it, dhcp is a uniform standard, so if it works sometimes and not others, its either the router, the printer or the cable thats causing the grief.
  3. RickTick

    RickTick LI Guru Member

    I kind of figured 4 also, but it seems to do ok on 2 or 3. All connections are built in to the laptop and the desktop. Not a big deal, more interested in the why than the actual min. (See below also)

    Main reason for asking (should have put this in post originally), does limiting the DHCPs allowed help any from a security standpoint? Either way, why does Linksys let one control this?
  4. ifican

    ifican Network Guru Member

    It will work with 2 or 3 but thats all you get access with is 2 or 3 devices depending on how you have it set.

    Does it help with security, from a purely security standpoint yes, however its nothing that cant be gotten around if one really wanted too. If you run secured wireless there is no need to worry there as long as you have a sufficient wireless key. From the wired side you need physical access to get an ip so unless that is a concern it is no issue. Personally i dont worry about it, i usually set mine to 25. That gives me plenty of ip's for any testing i may do or want to do at any given time. As to why linksys does it thats a good question and my guess would be to follow suit as most vendors now do. Is there a need, generally no but if you are one of those paranoid types you can limit dhcp scope, limit connectivity by mac and dynamically assign static ip's by mac if you so desire.

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