[ntp:questions] NTP Peering Queries
David Woolley
david at ex.djwhome.demon.co.uk.invalid
Tue Feb 24 22:33:04 UTC 2009
kiran shirol wrote:
> NTP experts,
>
> I have a few queries regarding NTP.
>
>>>> I have a following setup.
> 1. Valid NTP server
> 2. Device1 where i configure a NTP server with "ntp server" command.
> 3. Another Device2 where I configure Device1's IP address in "ntp
> peer" config.
> Question : Will Device2 be synced with Device1's clock ? How does
> the peer protocol work ?
Yes. I don't think there is any realistic difference from server.
>
>>>> I have the following setup
> 1. Valid NTP server
> 2. Device1 where I configure a NTP server with "ntp server" command.
> 3. In Device2 I configure Device1's IP in "ntp peer" command.
> 4. In Device1 I configure Device2's IP in "ntp peer" command.
> Question: How does the peering protocol work here. Does Device1 sync
> the clock of Device2 ?
Yes. Again there is a trivial loop and no independent source for device 2.
>
>>>> I have the following setup
> 1. Device1 where I configure Device2's IP in "ntp peer"
> configuration.
> 2. Device2 where I configure Device1's IP in "ntp peer"
> configuration.
> 3. No "ntp server" configuration and Device1 and Device2 both are in
> the same stratum.
> Question : How does the peer protocol work here ? And Which clock
> would be used to sync the time ?
Both machines will free run independently.
You need to use orphan mode, and a recent (possibly development version)
ntpd to gain anything useful in this configuration.
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