Re: [Ani-users] multiple dhcp user defined options
Status: Beta
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From: Hagen M. <h.m...@su...> - 2005-02-02 22:29:05
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hello, Marc Petitmermet wrote: |> the possibility is to define user classes for the dhcp-options on |> your dhcp-server, e.g. (linux dhcpd.conf): | | | you have to know that we have zero control over the dhcpd server | because it is managed centrally. they can provide us with the | necessary options but they must remain unchanged as long as | possible (they don't have the time to change these parameters all | the time) and that it must be scalable (multiple ani setups in the | same subnet). But that's it: With user classes you has really a good scalability, i.e. much better than with the finite available DHCP options. As in my last example shown, we use the user classes to provide different installation environments even in the same subnet. For every DHCP option you can define multiple user classes and this way you can allocate one DHCP with multiple values. And if you have the user-classes well defined, they can remain unchanged (it's the same with further DHCP options). | i was told that their dhcpd server does not have an option "user | class" but that they might figure out some other options later | which could be used for this task. hmmm, what kind of DHCP server do they use? Usually Linux as well as Windows DHCP servers are providing DHCP user classes.... Are you sure? You have to know, that 's much harder to provide more DHCP options and with this approach there are a lot of disadvantages: - - DHCP options are only finite available (lesser scalability, see http://docsrv.sco.com/NET_tcpip/dhcpC.udef.html) - - Different sources on the boot media - - Different sources in the installation environment (server side) - - Hard to distinguish the different media - - Lot of work to make the different media/environments On the other side DHCP user classes are really scalable and its already implemented in ANI. The sources are the same for every installation environment, hence you have less work with the maintenance. In Ani.cf[012] you can see which boot media has which user class. And the only disadvantage is, that you have different boot media for different installation environments, but it's the same disadvantage if you use more DHCP options. If you really want to do that work, I'll tell you which sources you have to change. (Don't do it!!) - -- Hagen -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCAVQnJ31vBDLS4wQRAsmIAJ0dK0CJB5K4DflSQBK0G/HmM9Z+kACg6fzZ sPoUGnno16dZ9jiKBl2fZU4= =KcRW -----END PGP SIGNATURE----- |