[ntpwg] [dhcwg] Re: Network Time Protocol (NTP) Options for DHCPv6

[Danny Mayer]

Brian Utterback wrote:
> Benoit Lourdelet (blourdel) wrote:
>> Considering a central DHCP server, the use of remote-id [RFC4649] or
>> just link-id may tell the server from where the request is coming then
>> giving it the knowledge of the delay to
>> apply.
>> In the case of a DHCP server hosted by the first hop, the DHCP server is
>> well positioned to know the delay.   
> 
> Oh, agreed, it is possible for the delay to be known. 

I consider that it is most unlikely for the DHCP server to know the
delay. Consider DHCP server D, client C and NTP server N. Each are in
different locations on the physical wire (wireless and other medium are
  similar). D may know its own delay to N but C is elsewhere on the
wire. You might be able to figure out the delay between D and C but how
does it relate to the delay between C and N? They are in different
locations on the wire. Is C closer to N, further away, on another
segment of the network?

Danny