We've used 6500s (Sup2 then Sup720) to provide time for 200+ internal clients for years, never had an issue. This is our core router providing time at our largest site to perhaps 400 devices:
327 3011968 40515977 74 0.00% 0.00% 0.00% 0 NTP It's pretty efficient, but we're not doing authentication either. For thousands of devices, an appliance might be better, though a modern ISR with a fast CPU (probably want a calendar chip in it) would probably be fine too. Note that Cisco doesn't seem to support the advanced features of NTPv4 from what I can tell such as PKI-based auth. An appliance is apt to support those. The beauty of most appliances is that they're easy to manage. If it fails, download the latest ISO from company, burn it, boot appliance, restore it and you're back in business in an hour or so. Keep in mind a linux kernel running just ntpd and some management necessities like ssh and http is pretty reliable. Hardly any I/O, just a simple function it does. Chuck -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Miehs Sent: Friday, June 22, 2012 7:14 PM To: [email protected] Subject: [c-nsp] NTP Servers Hi Guys Perhaps a little off topic - Are any of you using NTP appliances? I am in an enterprise environment. We have also considered using a couple of my 6500s but my gut tells me that is not a good thing (tm). We will be getting a stratum 1 feed from a local datacenter provider - and was looking at the various NTP boxes around - many of which with the ability to take a GSM clock source. Any thoughts on which one of these is stable? Thanks Andrew _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
