This seems to be 2 different things and often confused and blurred together...
1 - As I understand it, NTP is typically used for achieving a consistent clock source across devices such that date/time stamps of logs and various things (I heard even licenses in IOS XR could potentially be affected by bad clock (what isn't really expired could appear to be expired if wrong clock is there)) are consistent. 2 - the idea of network synchronization or network clocking is typically an idea/reality related to networks that pass traffic where synchronicity is needed....tdm networks used this....t1's.... xmitter and rcvr have to be locked-in with one another or you have bad user experience....pattern slips, errors, other things. I believe it's the accurate clocking of the oscillator (I think known as phase lock loop or something like that) that has to be there in order to understand where the REAL frame begins and ends..... I think this is opposite that of Asynchronous communications where I believe a clock isn't used but rather the clocking is achieved by looking at a leading, well known, bit pattern in the actual frame header so that the frame sort of tells the rcv'ing device when to start reading it in and where frame begins and ends. I believe Ethernet is considered to be asynchronous with its preamble/sfd telling the rcvr when to start reading in the frame and to stop reading that frame... Aaron -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of ujjwal maghaiya Sent: Wednesday, April 11, 2012 8:04 AM To: [email protected] Subject: [c-nsp] ip synchronisation hi, could anyone clarify me 1.)how synchronisation is achieved in CISCO networks. if it is NTP then how? 2.) whats the impact of ip clock in telecommunication network. _______________________________________________ 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/
