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NTP design questions !

kthned
Participant
Participant

Hi

Few questions on NTP design

what value is added by configuring multiple ntp servers apart from redundancy e.g.

ntp server 1.1.1.1

ntp server 2.2.2.2

ntp server 3.3.3.3

what value is added by configuring multiple ntp peer apart from redundancy e.g.

ntp peer 1.1.1.1

ntp peer 2.2.2.2

ntp peer 3.3.3.3

What value is added by configuing booth server and peer ?

ntp server 1.1.1.1

ntp server 2.2.2.2

ntp peer 2.2.2.2

ntp peer 3.3.3.3

Regards,

Umair

1 Accepted Solution

Accepted Solutions

Richard Burts
Hall of Fame Guru Hall of Fame Guru
Hall of Fame Guru

Umair

The answer to your first two questions is pretty much the same. If you configure two servers (or two peers) and the time that they report is quite different then how do you know which one to believe. But if three are configured and one is quite different then you can assume safely that it is incorrect and not believe it.

HTH

Rick

Sent from Cisco Technical Support iPhone App

HTH

Rick

View solution in original post

2 Replies 2

ngoldwat
Enthusiast
Enthusiast

Hi,

Here is a NTP Best Practices document along with the RFC.

I also responded on this general topic a few days ago.  You can find the post here.

Richard Burts
Hall of Fame Guru Hall of Fame Guru
Hall of Fame Guru

Umair

The answer to your first two questions is pretty much the same. If you configure two servers (or two peers) and the time that they report is quite different then how do you know which one to believe. But if three are configured and one is quite different then you can assume safely that it is incorrect and not believe it.

HTH

Rick

Sent from Cisco Technical Support iPhone App

HTH

Rick
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