[ntpwg] Additional text for SNTP

[Danny Mayer]

Brian Utterback wrote:
> 
> 
> Danny Mayer wrote:
>> I'd like to propose additional text be added to section 14 on SNTP in 
>> the NTPv4 protocol draft. I'm requesting this addition due to an issue 
>> that came up last week with an SNTP client.
>>
>> Suggested text:
>>
>> "An SNTP client MUST only send mode 3 packets (client) and MUST only 
>> accept mode 4 (server) and mode 5 (broadcast) packets. An SNTP client 
>> MAY send or receive mode 6 (NTP control) packet. All other packet 
>> modes MUST be ignored.
>>
>> An SNTP server MUST not send mode 3 (client) packets."
> 
> 
> Could you explain the intent to me, because the wording you used seems 
> contradictory. The first sentence says that a SNTP client must send only 
> one type of packet and the second sentence says that it is okay for a 
> SNTP client to send another type as well.

I'm trying to say that it can only send client queries but it can also 
respond to status queries (which is what mode 6 and 7 do). Can you word 
this better?


  If the second paragraph is
> true, then doesn't that mean that all SNTP servers must have a refclock?
> 

That's exactly what the spec says about SNTP servers.

Danny