IP aliases on a DHCP'ed interface

Discussion in 'Server Networking' started by Vide, Apr 22, 2009.

  1. LOL! I'll keep that in mind!


    Ace Fekay [Microsoft Certified Trainer], Apr 28, 2009
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  2. You're right, this is a technical challenge that adds a complexity that will
    be difficult or problematic to manage. Separate internal interfaces on the
    router with each interface connected to their own switch for each respective
    subnet would make more sense, otherwise I foresee difficulty managing this
    setup as described.

    Ace Fekay [Microsoft Certified Trainer], Apr 28, 2009
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  3. Vide

    Vide Guest

    I have far more hosts that a /24 could handle, and no, I don't want to split
    subnets, the hosts belong to the same LAN and so I want them to be in the
    same subnet. I will not change my mind about that (anyway if you have any
    objection, fell free to expose them.. only fools never change their minds :)
    Yeah, I'll go through the classic DMZ way. Thanks for the time spent on my
    Vide, Apr 28, 2009
  4. That,...is just not even close to being a good reason.
    There is no point in me explaining why that is a bad I dea if you aren't
    willing to listen. It would be a waste of my time and would probably just
    "annoy" me.

    But,....the Ethernet performance curve starts to dive after 250-300
    hosts...and you would be adding full networks (/24),...you wouldn't be
    splitting anything.
    Well, it isn't really a DMZ since there is no accompanying firewalling
    (unless what you have been calling a "router" is really a firewall),..but
    yes,..as far as the Topology goes it looks a little similar. But what you
    are really doing is adding the additional segments that you said above that
    you wouldn't do. You are effectively just adding the segment to
    your LAN with your router sitting between them.

    Phillip Windell

    The views expressed, are my own and not those of my employer, or Microsoft,
    or anyone else associated with me, including my cats.
    Phillip Windell, Apr 28, 2009
  5. Vide

    Ron Earwood

    Oct 13, 2011
    Likes Received:
    Like Mr. Windell, I too have a specific reason to have a DHCP supplied NIC that would be more than useful to have upon it an additional static IP.

    Let me explain...

    Within the facility are several high availability SAN environments utilizing UNIX based hardware. Like my desktop unit, the primary NIC on these redundant server pairs live on the house network and receive their IPs via DHCP. The manufacturer of these servers infused an IPMI interface on the same primary NIC interface via a dedicated ROM based OS. While IPMI can have many uses, the primary use here is for automated fail-over (power control). In as such, the IPMI addresses are static and setup as a subnet island (a tight subnet mask) so that random machines on the house network cannot inadvertently cause havoc. There are many times, however (remember IPMI's other uses?), where having access to IPMI's web-based console redirection or manual power control from a management station (such as my desk PC) is beneficial.

    As has been previously stated, I could setup my desktop machine to be pure static but the reason for this writing is to present an argument for why Microsoft might want to implement such a feature. There are valid applications for such a feature, I've read quite a few now on different blogs. I know that the way it currently is, is the way it's always been but as a systems designer myself, I know that just because it's always been that way doesn't mean it has to stay that way. I know that I'm constantly evolving our appliance.


    Ron Earwood
    Ron Earwood, Oct 13, 2011
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