Re: Requesting new IP address RH 9

From: Matthew Saltzman (mjs_at_ces.clemson.edu)
Date: 01/11/04

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    To: RedHat List <redhat-list@redhat.com>
Date: Sat, 10 Jan 2004 18:10:09 -0500 (EST)

    On Fri, 9 Jan 2004, John Nichel wrote:

    > Hi,
    >
    > I'm trying to get one of my RH boxes to request a new IP address from
    > the upstream DHCP server, but I've run into a snag. I've tried
    > restarting the network, and using ifdown/ifup for the particular network
    > card, but I keep getting the same IP. I seem to remember a command in
    > RH 7.x like 'dhcpcd', but it doesn't seem to be installed with RH 9, and
    > I can't find a package for it. I've googled, but can't find anything

    The DHCP client package in RH9 is dhclient-3.0pl2-6.14. If that's
    installed, you should only need to run redhat-config-network and check
    that you want to get IP settings using DHCP.

    > that I haven't already tried to give me a NEW ip address (I don't want
    > to get the same one).

    As others have pointed out, if you were getting your IP from DHCP before,
    you probably won't get a new address when you restart the interface. If
    you had a static address before, you *should* get a new address when you
    DHCP for it. The only reason I can think of that that wouldn't happen
    would be if you actually were using a DHCP address (maybe copied from a
    working DCHP on the Windows side of a dual boot) but were storing it
    statically because you hadn't figured out how to DHCP on the Linux side.

    There is a way to force-relinquish a DHCP lease (read the dhclient man
    page), but I don't think that will guarantee that you don't get the same
    IP on the next request. 

    -- 
		Matthew Saltzman
Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs
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