viktor@shearson.com (Viktor Dukhovni) (04/22/91)
We are considering installing a stratum NTP server running
on a Sun Workstation attached to a radio clock. We are NOT connected
to the internet, and so cannot talk to any of the existing stratum 1
servers.
Here are the questions:
1) Is anyone running xntpd as a stratum 1 server on Sun hardware?
Any known problems?
2) Whose clock are you using, is it directly supported by xntp,
or did you write your own driver? Did you need to modify the SunOS
kernel (to reduce terminal driver latency or some such?) can this
be done without source?
3) What happens when the radio clock fails? What happens when
the stratum 1 server fails? That is do we need more than
one radio clock server assuming that synchronizion is more
important than accuracy, that is we are willing to keep
"network average time" until the clock is fixed.
4) Is there any reason why I should look at ntpd instead of xntpd.
Basically most NTP documents are addressed to the Internet connected
audience, we have an internet of our own and need to start from scratch.
Our network has ~700 nodes, at least half in New York,
the rest scattered between London, Tokyo, and five domestic branches.
New York is roughly 20 subnets on two campuses liked by T1 lines.
How would you set up NTP for a small internet of this kind?
How much bandwidth would NTP comsume to London and Tokyo? (The lines
are 19.2kb/s satellite links ) What is a reasonable polling rate
if only 0.5% (100bps) is available for NTP?
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