remove
AARON RILEY
riley6902 at hotmail.com
Fri Jun 16 20:05:33 UTC 2006
remove
>From: Simon Hobson <dhcp at thehobsons.co.uk>
>Reply-To: dhcp-users at isc.org
>To: dhcp-users at isc.org
>Subject: Re: how respond only to specific clients
>Date: Fri, 16 Jun 2006 07:51:23 +0100
>
>Carl Karsten wrote:
>
> > > All your hosts you want to supply dhcp to will need to be defined in
>a
> >> host statement. You'll need one of these for each known host.
> >>
> >> Something like this should do it:
> >>
> >> host foo1 { hardware ethernet aa.bb.cc.dd.ee.ff; }
> >> host foo2 { .... }
> >> ...
> >>
> >> subnet 192.168.0.1 netmask 255.255.255.0 {
> >> pool {
> >> option routers 192.168.0.1;
> >> option ...
> >> ignore unknown-clients;
> >> range 192.168.0.10 192.168.0.254;
> >> }
> >> }
> >>
> >> Repeat for as many hosts and subnets as required.
>
> >Don't you need that whole thing wrapped in a group { .. } ?
>
>No. That is optional, and would typically be used when you want to
>add/change some option(s) for a bunch of hosts - perhaps you want to
>give 'known' hosts a longer lease time. Instead of adding options to
>each host statement, you put them in a group and add the options to
>the group.
>
> >Also, what is going to make it " look for another dhcp server." ?
>
>The client will broadcast for a server to give it an offer. If
>there's more than one server then they should all reply (if
>configured). If this server is configured not to answer, and another
>one does, then the client will automatically use the offer it gets
>from the other server.
>
>So really there is no such thing as 'looking for another server', it
>all comes under looking for any and all servers that service the
>subnet.
>
> >I don't think what is being requested can be done, at least not reliably.
> the
> >"look for another dhcp server" sounds like "broad cast again and see if
>the
> >other server responds quicker this time" and there isnt anything
> >preventing that
> >from happening the first time.
>
>It does work, as described above. No special settings other than
>configuring which servers will consider/ignore which clients.
>
>Simon
>
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