Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for-v4-03
Ted Lemon <mellon@fugue.com> Thu, 12 August 2004 22:53 UTC
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From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for-v4-03
Date: Thu, 12 Aug 2004 15:42:55 -0700
To: "David W. Hankins" <David_Hankins@isc.org>
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In the case of a PXE boot like the one you describe, the right answer for the ISP is to configure the DHCP server to put PXE clients in a special class, and not offer service to clients in that class. Then you don't have to worry about inappropriately responding to PXE clients that you can't actually configure. This is really the same problem as the well-known RAS server problem. One nice side effect of ignoring PXE clients is that since the boot now has to time out, the user will probably notice the incorrect boot order. This probably goes unnoticed with the current configuration because PXE probably gives up immediately when it gets a response with no PXE boot information in it. An additional advantage of PXE is that it gives up quickly, so you don't have to worry about endless DHCPDISCOVERs in your log files. My experience over the years is that when customers feel they need to hack the DHCP server sources, it's usually because they aren't aware that it's already possible to configure the server to address the problem they're having. I think this is true somewhat independently of the server implementation - it's certainly just as true of the Nominum DHCP server as it is of the ISC DHCP server, and I think it's also true of Cisco's DHCP server. _______________________________________________ dhcwg mailing list dhcwg@ietf.org https://www1.ietf.org/mailman/listinfo/dhcwg
- [dhcwg] Comments on draft-ietf-dhc-3315id-for-v4-… David W. Hankins
- RE: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Bernie Volz
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Ted Lemon
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… David W. Hankins
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Ted Lemon
- RE: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Bernie Volz
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… David W. Hankins
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… David W. Hankins
- RE: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Bernie Volz
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… David W. Hankins
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Ted Lemon
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… David W. Hankins
- Re: [dhcwg] Comments on draft-ietf-dhc-3315id-for… Ted Lemon