[j-nsp] NTP Sources placement in MPLS network

[Jared Mauch]

We have servers in each location with NTP synced to local stratum 1 or 2 clocks. Customers are given an anycast ip that points to these for time sources. We configure routers to point at these local sources. 

Jared Mauch

> On Nov 19, 2013, at 6:53 AM, Yham <yhameed81 at gmail.com> wrote:
> 
> Thanks Jared. I am planning deploy ntp source that will point to global NTP.
> 
> I am curious to know where service provider with mpls network position the NTP?  Any best practices ?
> 
> Regards
> 
> 
>> On Mon, Nov 18, 2013 at 5:57 PM, Jared Mauch <jared at puck.nether.net> wrote:
>> In this case you can sync to any other device or devices that are globally reachable.  Typically you can just use some IP that doesn’t often change, e.g.: loopback.  If you are running 100% of the network, you can also use the ‘ntp broadcast’ and similar interface commands to listen/send this data hop-by-hop.
>> 
>> There’s lots of ways to do this, and not necessarily a ‘wrong’ way.
>> 
>> - Jared
>> 
>> On Nov 18, 2013, at 5:54 PM, Yham <yhameed81 at gmail.com> wrote:
>> 
>> > Thank Jared,
>> >
>> > NTP is only needed to synchronize the logs so on event of failure, logs from related devices can be correlated.
>> >
>> > Thanks
>> >
>> >
>> >
>> > On Mon, Nov 18, 2013 at 2:52 PM, Jared Mauch <jared at puck.nether.net> wrote:
>> > This all depends on what you need the clocking for.
>> >
>> > If you want just generic time for accurate logs?
>> >
>> > Depending on what you want to do, there's cheap NTP clocks like this:
>> >
>> > http://www.netburnerstore.com/product_p/pk70ex-ntp.htm
>> >
>> > For about $350 (including S/H in the US) you get a GPS clock.  With the right location/antenna you can get signal through some roofs.
>> >
>> > There's a variety of higher-end timing options depending on what you need.
>> >
>> > - Jared
>> >
>> > On Nov 18, 2013, at 2:33 PM, Yham <yhameed81 at gmail.com> wrote:
>> >
>> >> Hi Guys,
>> >>
>> >>
>> >> In a SP environment where there are hundreds of PEs and P devices that got
>> >> hundreds of customers VRFs, what is the best place to connect NTP sources.
>> >> The place i can think of is connecting with VPNv4 Route Reflectors because
>> >> they exist on top of hierarchy and so clock can travel downward from RR to
>> >> PEs and P and from PEs to CEs and further down if required.
>> >>
>> >> Any thoughts on this please.
>> >>
>> >> Regards
>> >> _______________________________________________
>> >> juniper-nsp mailing list juniper-nsp at puck.nether.net
>> >> https://puck.nether.net/mailman/listinfo/juniper-nsp
>> >
>> >
>