[cisco-voip] Checking NTP status on CCM

[Micah Bennett]

Wes

 

Thanks for the info.  I will keep that in mind when we do an upgrade on
the CCM platform.  

 

Everything is working good.  Our Pub is pointed to our secure (Keyed)
clock referencing the security key in the ntp.conf file.  All subs and
crs servers are pointed to the Publisher.  

 

Micah Bennett

Telecommunications Admin

Automated License Systems

 

  _____  

From: Wes Sisk [mailto:wsisk at cisco.com] 
Sent: Friday, May 16, 2008 1:44 PM
To: Micah Bennett
Cc: Robert Kulagowski; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Checking NTP status on CCM

 

You *can* because you have full access to the servers, however
understand that any upgrade will overwrite the configuration file. See
CSCsb66270.  It is very important for your CM servers to be time
synched, even if it's the wrong time. This is why the basic
recommendation is:
1. all subs synch to pub
2. pub *may* sync to another clock source.

It's generally not a good idea to sync all servers independently because
of the variations that become possible (different ntp sources, ...)

/Wes

Micah Bennett wrote: 

I agree that that document says not to, but this document says the
opposite.  Page 7 of 8 near the bottom in reference to the configuration
for CCM 4.2 and earlier.  That is where the confusion lies.  
 
In my TAC case I also asked if I can just point all my servers straight
to the clock servers using the NTP.conf file that is on each box.  No
answers back yet on any of my TAC questions. 
 
Micah Bennett
Telecommunications Admin
Automated License Systems
 
-----Original Message-----
From: Robert Kulagowski [mailto:rkulagow at gmail.com] 
Sent: Tuesday, May 13, 2008 9:13 AM
To: Micah Bennett
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Checking NTP status on CCM
 
Micah Bennett wrote:
  

	Hello all
	 
	My CCM publisher server is pointed to our two NTP servers (via
the 
	NTP.conf) file.  My two CCM subscriber servers and my two IPCC
servers
	    

 
  

	are pointed to the CCM Publisher as their NTP source.
	    

 
According to 
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_configurat
ion_example09186a008009470f.shtml
 
Don't do that:
"
Note: You cannot use NTP to synchronize between two Cisco CallManagers. 
The NTP that is installed in Cisco CallManager is a client NTP service 
and only synchronizes to an NTP server.
"
 
 
 
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