[ntp:questions] Re: NTP, Mac OS X & Cisco 837

viz viz at REMOVEBLOCK.pacific.net.au
Wed Apr 13 02:00:58 UTC 2005




On 12/4/05 9:57 PM, in article LMadnaaVd-A3KsbfRVn-sA at comcast.com, "Richard
B. Gilbert" <rgilbert88 at comcast.net> wrote:

> viz wrote:
> 
>> Description: Newbie (to NTP) wanting to set up NTP on a Mac G5, and to have
>> it act as a broadcast server for a Cisco 837 router running SNTP. Mac ver
>> 10.3.8; NTP ver 4.1.1, Cisco 837 ver 12.3(2)XC2
>> 
>> Problem: Cannot get my Mac to synch with Sydney located timeservers
>> 130.155.98.13 or 130.155.98.1
>> 
>> ntptrace
>> localhost: stratum 16, offset 0.000070, synch distance 0.08113
>> 0.0.0.0:        *Not Synchronized*
>> 
>> Cannot get my router to lock on at all and thinking that if I can get the
>> Mac set up properly I can get the router to synch off that. Feasible?
>> 
>> Couple of things:
>> 
>> - I need a basic config manual suitable for a newbie ;) (not XNTP).
>> 
>> - Need some hints on getting the router to synch with the Mac
>> 
>> I understand that it is difficult to get the Mac to ignore the GUI config -
>> any work-arounds?
>> 
>> 
>> Any takers? :)
>> 
>> /viz
>> 
>>  
>> 
> I believe I recall reading that you can configure a Cisco router to use
> NTP by telling it "
> enable ntp <IP address of server>
> "
> I have never done this myself so proceed with caution.  It may also be
> worth noting that many people feel that routers should devote their
> resources to routing and not to keeping time.  Again, I have never been
> responsible for a Cisco router and done know if this is a caution based
> on experience or simply prejudice.

The router quite happily will configure for sntp:

Sntp server <IP>

However SNTP has its limitations including I believe drift control.

I am one of those anal retentive pedants who has to have every clock in the
office/house/wrist synchronized. A psychiatrist would have a field day with
me...! :)

/viz




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