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 <yhamee...@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 <ja...@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 <yhamee...@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 <ja...@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 <yhamee...@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-...@puck.nether.net >> >> https://puck.nether.net/mailman/listinfo/juniper-nsp >> > >> > > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
