[ntpwg] Documents, slides, etc. from WG meeting

[Brad Knowles]

On 10/23/07, Danny Mayer wrote:

>>  A long discussion at end of meeting discussing the future of
>>  timekeeping here in the IETF.  Is the future 1588 over IP?
>>  NTP over IP?  No consensus was reached.
>
>  Could some explain exactly what that means? Is this a question of
>  certain protocols (DNS and Kerberos come immediately to mind) that
>  require that two interacting servers keep their clocks within X minutes
>  of each other in order for various security requirements to work
>  correctly or ro be assumed to be valid? Is it something else?

Well, NTP is inherently an IP protocol.  From reading the IEEE 1588 
page, it's not clear whether this works over IP or not, although it 
does seem to work over Ethernet (and maybe others?).  But IEEE 1588 
seems to focus on ultra-high resolution, like sub-microsecond or even 
sub-nanosecond.  Meinberg appears to have a clock that does both NTP 
and IEEE 1588.

But I'm not seeing how IEEE 1588 can provide synchronization to an 
outside reference, and I'm not seeing how it can be used outside of 
certain limited circumstances on a pretty much pure Ethernet network.

-- 
Brad Knowles <brad at shub-internet.org>
LinkedIn Profile: <http://tinyurl.com/y8kpxu>