[c-nsp] NTP Config

[Jay Hennigan]

Hitesh Vinzoda wrote:
>  hey Guyz,
> Thanks for your suggestions... but we are going pretty deep inside.
> 
> i dont want to sync my 6509 to sync with any public time sources.

If not, why bother running NTP at all?  The clock in your "master" 6509 
will drift, making your timestamps meaningless.

> i want 1 out of 4 6509 to act as NTP master and want redundancy in the core
> for NTP and want my 350 LAN devices to be able to update the time from NTP
> server (6509).

Then your configuration will accomplish that.  All of your 6509s in the 
group will be synchronized to the (almost certainly inaccurate) time of 
the master, and will happily feed that to the 350 LAN devices.  Garbage 
in, garbage out.  Your configuration will only guarantee IDENTICAL 
garbage throughout your network.

If you're hesitant to connect to a public time server over the Internet, 
then consider using a GPS or WWVB clock locally.  This doesn't expose 
your network to the public Internet.

> Please advice

If your sole purpose is to ensure that all 6509s and your LAN devices 
display the *SAME* time, then your initial proposal will work.  If you 
want to also ensure that they display the *CORRECT* time, you will need 
to incorporate an authoritative time source into the network.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
Impulse Internet Service  -  http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV