Hi John:
In my dhcpd.conf, I have
"deny unknown-clients;" and I have an entry for each of my node like
this:
subnet 192.168.0.0 netmask
255.255.255.0 {
group
{
host
g0002{
hardware ethernet
00:90:4F:01:59:00;
fixed-address
192.168.0.218;
filename
"pxelinux.0";
option routers
192.168.0.1;
option domain-name
"yourdomain.com";
}
So far it seems to have
worked with 2 DHCP servers running on the same network - of course, each DHCP
server is only responsible for a subset of nodes. However I guess this may
not work for Allen since he has no control over the corporate DHCP server - he
needs to ensure that it does not give IPs dynamically, which may not be possible
to do.
Cheers,
Bernard
no, to prevent giving out ips that you don't really own on a private
network you have to only allow certain mac addresses to get ips.
unfortunatly, when you do that, the dhcp client is not bright enough to try
again and maybe get another server...so you end up denying the dhcp request and
they get no ip.
or you can give out for another network, essentially running two subnets
over the same wire, and then the poor clients can't route. Trust me...I
did this. :)
On Jan 5, 2006, at 11:47 AM, Bernard Li wrote:
Correct me if I'm wrong,
but I think as long as the DHCP servers aren't both handing out IPs
dynamically and they don't have the same IP reservations, it should be
fine having more than one DHCP servers in one network. Of course it
could just be that I haven't had any issues... yet. :-)
Cheers,
Bernard
Bernard Li wrote:
> Hi Allen:
>
>
You mention that you cannot use a custom DHCP - can you use the
>
_existing_ one then for this purpose?
That would make things easier,
but unfortunately I can't modify the
existing network in any way. The
clusters I am using are normally
inside corporate networking environments
where I can not modify the
existing DHCP system in any way. It would
be possible to get standard
network settings from it (IP, domain, gateway,
etc), but I can not
extend it to return custom information like the image
server information.
To make thinks even more difficult, I can't create
a "local" DHCP server
because it would be on the same network as "normal"
server. Also I am
not in a setup where I am able to create a private
subnet for the
cluster and hide them behind a dual-homed control node or
anything like
that.
Is this type of setup that abnormal for using
SystemImager?
-Allen
>
> If you go with the
"static DHCP" route, you should just need a DHCP
> server for initial
deployment, as the IP address should then be
> hardcoded on the node's
network files so subsequently the nodes will
> boot fine without a DHCP
server. Perhaps this is one route you can take?
>
>
Cheers,
>
> Bernard
>
>
------------------------------------------------------------------------
>
*From:* [EMAIL PROTECTED]
on behalf of Allen
> Bierbaum
> *Sent:* Wed 04/01/2006
16:21
> *To:* sisuite-users@lists.sourceforge.net
>
*Cc:* [EMAIL PROTECTED]
>
*Subject:* [Sisuite-users] Interactive SystemImager installs with
CD
>
> I recently started investigating the use of SystemImager to
standardize
> the installation and maintenance method for a number of
clusters I use.
> So far it looks very close to what I want but I have
run into an issue
> where I am not going to be able to use a custom DHCP
server with my
> clusters. Instead I would like to use a boot CD
to start the installs
> and then interactively provide the hostname and
other minimal
> information during the installation process. I can
do this manually by
> using a local.cfg file but this seems like
something that could be made
> a little less painful. Looking
through the list archive I found the
> following
postings:
>
> HP CD: http://marc.theaimsgroup.com/?m=109467156214191
>
Jan Ekholm: http://marc.theaimsgroup.com/?m=109508123028725
>
>
Jan's method sounds like what I want (or at least a start), but the
>
details of this method were never posted. Can anyone provide
more
> extensive details as to how I would accomplish this? I am
more then
> willing to test it out and post the complete results and
associated
> instructions/files on the wiki for people to use in the
future.
>
> Thanks,
> Allen
>
>
>
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