On Wed, 2 Apr 2003, John wrote: > > On Wed, 2 Apr 2003, Tony Nugent wrote: > > But in the end, wouldn't it be much easier to have a dhcpd server > > allocate static IPs based on the HW address, then have the > > host-specific ks.cfg file available based on IP rather than HW > > addresses? (This is the more traditional approach). > > As I've already pointed out, you cannot rely on MAC addresses unless you > have the knowledge that the server and client are on the same piece of > wire. We are using static IP addresses and we fill our dhcpd.conf file via a script that does SNMP queries to the switch the client nodes are connected to. This script reads out the MAC address and the port the switch sees it on. Because I know our cabeling, I know which IP address is supposed to be assigned to a particular host (= switch port). I am using this mechanism in real time for new machines: Machined does DHCP broadcast during PXE -> initializes switch port -> fills switch CAM table -> SNMP read -> fill dhcpd.conf -> kick dhcp server -> serve IP address to PXE client. Oh, before you ask: the script works for Cisco 6509s only. See http://www.slac.stanford.edu/~alfw/PXE-Kickstart/ for more details. -- Alf. ----------------------------------------------------------------------- Alf Wachsmann | e-mail: alfw@xxxxxxxxxxxxxxxxx SLAC Computing Service | Phone: +1-650-926-4802 2575 Sand Hill Road, M/S 97 | FAX: +1-650-926-3329 Menlo Park, CA 94025, USA | Office: Bldg. 50/323 ----------------------------------------------------------------------- http://www.slac.stanford.edu/~alfw (PGP) -----------------------------------------------------------------------
