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Re: [dhcwg] RFC 3942 notice: GNU GRUB, DHCP option 150

From: Ted Lemon
Subject: Re: [dhcwg] RFC 3942 notice: GNU GRUB, DHCP option 150
Date: Wed, 16 Mar 2005 10:47:47 -0700

On Mar 16, 2005, at 4:49 AM, Timothy Legge wrote:
Noted. It looks like we all get to apply for a new option code when the process becomes available.

A couple of points. First, it's fine for all three users of code 150 to submit informational drafts describing what they are doing. Second, since there are three conflicting uses, I would suggest that the people responsible for them switch to the standard vendor-specific encapsulated options mechanism, or if the option they are using is something that ought to be more widely implemented, I would suggest writing a standards-track draft describing what you want to do.

In the case of GRUB, specifically, what I would suggest is that new versions of GRUB should send a vendor-class-identifier option, and should be prepared to receive a vendor-specific encapsulated option. However, it should also request option 150. This allows for backwards compatibility, but allows for a migration away from option 150. Since, if I understand it correctly, GRUB is a second-stage boot loader, it should be the case that over time versions of GRUB that *require* option 150 will go out of use, meaning that server administrators will be in a position to safely discontinue use of option 150.

However, please note that there is no requirement on you to follow my suggestion here. It's just a suggestion. It's perfectly permissible for you to just write up an i-d documenting what you're doing now and leave it at that - the only reason I suggest the other option is that as use of GRUB possibly becomes more widespread, the conflict between the three uses of option 150 will become more of a problem. Using vendor-specific options resolves the conflict, so in the long run I think it's better for the end user.

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