[ntp:questions] server and peer lines correct?
jason at extremeoverclocking.com
Sun Apr 6 15:13:01 UTC 2014
Charles Swiger wrote:
> Your comment means a discussion of best practices of configuring
> these stratum-1s is also beyond the scope of answers to your post.
> Odd, but have this as you would....
Charles, my S1 servers are a mixture of NTP appliances and other hardware that do not run the standard NTP distribution. They don't
have the ability to configure peering and such. That's why I said it's beyond the scope of my post / question. ;)
> Don't bother using more than one iburst entry per server.
I think your wording is a little confusing. Are you saying only use iburst on one remote server and not all of them?
I was reading the NTP docs last night and came across a couple interesting notes. First it says not to use iburst with peer lines.
Also it says the most stable behavior for symmetric active mode is to set maxpoll 6 for both peers. I'll probably give it a try and
see how things turn out.
> Start everything up; wait a while; run?
What I meant was, is there a way to see / verify if the association with a remote machine is a peer-peer vs server-client? Other
than looking in the configuration file? The regular ntpq -p output doesn't show any differentiation?
remote refid st t when poll reach delay offset jitter
+192.168.88.231 .GPS. 1 u 252 256 377 1.018 -0.212 0.246
+192.168.88.232 .GPS. 1 u 239 256 377 1.018 -0.255 0.340
*192.168.88.233 .GPS. 1 u 80 256 377 1.118 -0.234 0.250
+192.168.88.234 .GPS. 1 u 196 256 377 0.960 -0.175 0.311
+192.168.88.235 192.168.88.234 2 u 15 16 376 0.858 -0.179 0.070
+192.168.88.60 192.168.88.233 2 u 39 256 377 0.407 -0.179 0.345
> They'll be fine for several days. However, if all of the S1s
> go down for an extended duration, and there are no other sources
> of time available to the S2s, then the S2 servers will increase
> their dispersion estimate, which will eventually cause downstream
> clients to prefer other time sources.
There are no time sources listed in any configs that are outside of the local LAN. I supposed I could add some external NTP servers
like you mention to my S2 group, but the thing that nags me is they are usually always off by a couple ms, I guess due to network
delay and uncertainty and such.
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