[ntpwg] [dhcwg] Re: Network Time Protocol (NTP) OptionsforDHCPv6

[David W. Hankins]

On Tue, Nov 27, 2007 at 10:00:34PM -0500, Danny Mayer wrote:
> This was the next question to ask of course. How many of the addresses
> in the reply are cached for distribution as appropriate? With the pool

Precisely as many as appear in the DNS reply.  There is no upper or
arbitrary limit internally, so DNS limits apply.  If the query is
made via TCP, I understand the DNS reply packet can be up to 64KB,
of which a subset would be actual answers.

Note that although the construction of the option contents from DNS
names has no internal limit, the resulting data buffer may be too
large to fit into a DHCP reply packet (~312 bytes, possibly another
192 bytes) particularly with other higher priority configuration
values present.  In this situation, the data is omitted entirely
rather than truncated for inclusion.

-- 
Ash bugud-gul durbatuluk agh burzum-ishi krimpatul.
-- 
David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins
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