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  1. #1
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    DHCP on a Linux server, when to use?

    Hi,

    If this post is not on the right boards, mods pls move this.

    Anyway, I'm helping a friend of mine with his new office. I will be using a Cisco/Juniper appliance for the router that supports SSL VPN. As far I understand, most of these appliance (from Cisco/Juniper) already supports DHCP? I'd like to know on why is it some uses DHCP server that's on Linux/Windows box?

    I mean, why use a Linux/Windows server for DHCP when your Router can offer that service?

  2. #2
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    DHCP may not always suitable, as the IP will be dynamic. Most prefer static IP to be set for their workstations.
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  3. #3
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    Quote Originally Posted by spykee View Post
    Hi,

    If this post is not on the right boards, mods pls move this.

    Anyway, I'm helping a friend of mine with his new office. I will be using a Cisco/Juniper appliance for the router that supports SSL VPN. As far I understand, most of these appliance (from Cisco/Juniper) already supports DHCP? I'd like to know on why is it some uses DHCP server that's on Linux/Windows box?

    I mean, why use a Linux/Windows server for DHCP when your Router can offer that service?

    Also,
    If the router was to fail, Then the network would be unusable for any new devices.
    You would still want intra-site communication to work, without the router, Your internet / wan would be stuff and any new users would also be stuffed.

    Another thing is people like to split services up.
    A router - Routes.
    A printer - prints.
    a DHCP server - hands out addresses / dns etc.
    a phone - phones.
    etc etc.
    Live Chat Support Software for your Business website - IMsupporting.com

  4. #4
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    ok, that makes sense. thanks lynxus.

  5. #5
    Join Date
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    New Zealand
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    The main reason for using a server over a router for DHCP is ease of management, another is memory and cpu. Large scale DHCP deployment is much easier on a server.
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  6. #6
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    Quote Originally Posted by spykee View Post
    Hi,

    If this post is not on the right boards, mods pls move this.

    Anyway, I'm helping a friend of mine with his new office. I will be using a Cisco/Juniper appliance for the router that supports SSL VPN. As far I understand, most of these appliance (from Cisco/Juniper) already supports DHCP? I'd like to know on why is it some uses DHCP server that's on Linux/Windows box?

    I mean, why use a Linux/Windows server for DHCP when your Router can offer that service?

    Hi spykee,
    I cannot comment on the specific DHCP implementation that the mentioned Cisco/Juniper device might have, however in most cases a separate service on a Linux/Windows server will provide a lot more features.

    To name a few:
    - Segregate DHCP clients into groups by type of hardware(MAC address), operating system, custom tag.
    - Specify separate DHCP pools for the different groups
    - Pass different DHCP options (gateway, dns, ntp, custom) to the different groups
    - Deny a DHCP lease to certain clients
    - Other which I'm probably forgetting
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