[ntpwg] [dhcwg] draft-gayraud-dhcpv6-ntp-opt-01.txt

Danny Mayer mayer at ntp.isc.org
Sun Mar 16 03:48:20 UTC 2008


Bernie Volz (volz) wrote:
>> What would be the use of this? It doesn't have anythnig to do with NTP 
>> since NTP doesn't care about domains. Can you clarify?
>  
> I think the general thought is that domain names can get you an address
> or addresses. So, why can't an NTP client (or server) make use of DNS to
> lookup the domain name (FQDN) and make use of the addresses? [While a
> perfect user of a domain name would adhere to the TTL of the information
> and re-query when the TTL is up to obtain the newest information, this
> rarely happens - the application is more likely to look up the name once
> and then use the address it found.]
> 

You used the term domain name rather than FQDN which is what confused 
me. I make a careful distinction between the two (when I put my DNS hat on).

> Or, are you saying that NTP servers (or SNTP servers if any exists)
> aren't ever entered in the DNS?
> 

NTP almost alway uses FQDN and look up the addresses in DNS. Use of the 
pool for example requires DNS lookups.

Danny


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