Jasper, actually it's not NMEA, it's been a long time ago since I noticed the feature :)
as per http://www.cisco.com/en/US/partner/docs/ios/12_2/configfun/command/reference/frf012.html#wp1123799 two protocols are supported - Trimble Palisade and Telecom Solutions (and possibly other vendors talking those protocols) you'll find more searching cco for the 'ntp refclock' command, enjoy ;-) -- deejay > -----Original Message----- > From: Jasper Koolschijn [mailto:jkoolsch...@routit.nl] > Sent: Monday, February 07, 2011 3:24 PM > To: Daniska, Tomas > Cc: Kimaru Mansour > Subject: RE: [c-nsp] NTP Server Recommendation? > > Hi Deejee, > > I have been looking al over the internet but other than the HDSPA card > for 3G networks is cant find an suitable IOS for NMEA Could you please > give me some directions on where to find this option. > > We sure would like to test the capability of the NMEA over the Cisco CPU > to get an perfect time on the network. Like an Stratum 2. > > Kind regards, > > > Jasper Koolschijn > > Technical Engineer > Core Networking > RoutIT BV > Maxwellstraat 51 > 6716 BX Ede > Phone: +31 (0) 88 437 2636 > Email: jas...@routit.nl > Visit us @ www.routit.nl > > > -----Oorspronkelijk bericht----- > Van: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp- > boun...@puck.nether.net] Namens Daniska, Tomas > Verzonden: maandag 7 februari 2011 10:21 > Aan: Michael Vinogradsky > CC: cisco-nsp@puck.nether.net > Onderwerp: Re: [c-nsp] NTP Server Recommendation? > > some time ago i have noticed that IOS is to support NMEA over async > ports, so one can buy an inexpensive GPS receiver and gets a perfect > synchronized clock... but never managed to try it out myself > > -- > > deejay > > > -----Original Message----- > > From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp- > > boun...@puck.nether.net] On Behalf Of Michael Vinogradsky > > Sent: Sunday, February 06, 2011 6:27 PM > > To: Phil Mayers > > Cc: cisco-nsp@puck.nether.net > > Subject: Re: [c-nsp] NTP Server Recommendation? > > > > So 3 it will be. I'll probably go with cisco routers. I appreciate the > > feedback! > > > > On Feb 5, 2011, at 7:19 PM, "Phil Mayers" <p.may...@imperial.ac.uk> > > wrote: > > > > > On 02/05/2011 11:32 PM, Michael Vinogradsky wrote: > > >> The design would be comprised of two redundant NTP server in > > >> separate geographic locations. The budget in the ballpark of two > 2800 routers. > > >> Precision is not that important. > > > > > > Two NTP servers is a bad number. If one malfunctions... how does a > > > client know which one to trust? Have at least 3. > > > > > > I would recommend ntpd on a Linux box or boxes. It will handle very > > high > > > numbers of NTP clients and is the reference implementation, with > > > very comprehensive config guides. > > > > > > Unless you have very specialist needs, it is unlikely you need a > > > local clock source; there are almost certainly good local tier1 NTP > > > servers you can sync to (pick at least 5; have each of your > > > at-least-3 local servers act as client to them, and peer to each > > > other) _______________________________________________ > > > 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/ > > > > > > Confidentiality Notice: This e-mail message, including any > > attachments, is for the sole use of the intended recipient(s) and may > > contain confidential and privileged information. Any unauthorized > > review, use, disclosure or distribution is prohibited. If you are not > > the intended recipient, please contact the sender by reply e-mail and > > destroy all copies of the original message. > > > > _______________________________________________ > > 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/ > > _______________________________________________ > 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/ _______________________________________________ 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/