Thank you

Ip helper is not an option and I have vlan tagging already set.  I created dhcp 
template for each subet and that's all working.   Finally I have dhcp-tag setup 
for dhcp and hosts are in correct group.

The only thing I need is a way to work with pxe and kickstart.  I am thinking 
that pxe might work with dhcp-tag but no clue how to do kickstart.  What I 
would like to see is a variable I can use for the tree in profile so that 
install tree's ip changes base on vlan tag the host is coming from.

----- Original Message -----
From: [email protected] 
<[email protected]>
To: cobbler mailing list <[email protected]>
Sent: Tue Aug 10 20:07:14 2010
Subject: Re: Cobbler on multi-segmented network.


On Tue, 10 Aug 2010 16:47:36 -0500, <[email protected]>
wrote:
> Hey
> 
> I am wondering if anybody can give me a suggestion as to which way is
> best to proceed.
> I have a server on a multi-segment network. I.E. it has a lot of VLANs
> connected to it.
> On this server I installed cobbler. What I want to do is have each
> server that needs to be installed automatically pick the right
> pxe/kickstart options.
> I am not sure if there is a way to script this, without having a profile
> for each segment. I would prefer to avoid that and have a single "if
> then" structure in a template for the pxe menu and kickstart.
> 
> Is there any variable that cobbler has an access to that I could use to
> do this? (for instance ability to read the IP of the host).

Are you using tagged vlans?  Personally, I would not set cobbler up that
way, as it becomes a maintenance headache.  If you're using Cisco hardware,
you can configure your switches to use the "ip helper" command to forward
layer 2 traffic to a layer 3 host, so you can do things like DHCP and PXE
across segments.

In your case, if you're using tagged vlans, you'll have to create a vlan
interface for every vlan you want to build things on, and configure dhcpd
networks for each of them in dhcpd.template (also add the vlan interface to
your dhcpd settings, /etc/sysconfig/dhcpd if you're using RHEL or similar).
 Then you can use the dhcp tags variable to pin systems to a specific dhcp
network.  The down side is, everytime you add a new network, you have to
update your dhcpd.template, settings, etc., thus the maintenance
headache.


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