Re: [dhcwg] Re: one more comment about the lifetime option

Stig Venaas <Stig.Venaas@uninett.no> Fri, 03 September 2004 08:12 UTC

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Date: Fri, 3 Sep 2004 09:56:17 +0200
From: Stig Venaas <Stig.Venaas@uninett.no>
To: "JINMEI Tatuya / ?$B?@L@C#:H" <jinmei@isl.rdc.toshiba.co.jp>
Subject: Re: [dhcwg] Re: one more comment about the lifetime option
Message-ID: <20040903075617.GA22032@sverresborg.uninett.no>
References: <y7vy8jt3u2u.wl@ocean.jinmei.org> <000701c490ea$db453770$6501a8c0@amer.cisco.com> <y7vacw75081.wl@ocean.jinmei.org>
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Cc: dhcwg@ietf.org, Bernie Volz <volz@cisco.com>, "'Ted Lemon'" <mellon@nominum.com>
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On Fri, Sep 03, 2004 at 03:35:10PM +0900, JINMEI Tatuya / ?$B?@L@C#:H wrote:
> >>>>> On Thu, 2 Sep 2004 08:46:24 -0400, 
> >>>>> "Bernie Volz" <volz@cisco.com> said:
> 
> >> An authentication 
> >> option can be used with Information-request and can have sub-options.
> 
> > That's news to me and I don't see where this is possible based on RFC 3315.
> 
> Ah, okay, I was wrong.  The authentication option is a variable-length
> option but does not take a sub-option according to RFC3315.
> 
> > But in any case, its no big deal to specify that the option is restricted to
> > the message level.
> 
> That's correct.  But at the same time, I believe we all agree that
> there is no reason to allow the lifetime (or refresh timer) option
> appearing as a sub-option.

Yes, I don't mind adding some wording to the fact. It's against the
whole idea to use it as a sub-option.

I must say though that I'm a little bit surprised this came up. I'm
not that into the world of DHCP, but I don't recall seeing specs for
other options saying this, and I had thought that they should only
be used as sub-options if specified as such. Or is the idea that in
general, any option could be used as a sub-option?

I think though that the IRT (lifetime) option might appear to make
sense as a sub-option, while many other options pretty obviously
don't make sense. So I'm happy to add the wording, just to avoid
possible misuse.

Stig

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