[ntp:questions] orphan mode and layered redundancy
Florin Andrei
florin at andrei.myip.org
Fri May 27 23:13:15 UTC 2011
I ended up doing this:
On the local NTP servers A ... F:
###################################
restrict default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict bunch mask 255.255.0.0 nomodify notrap
restrict of mask 255.255.0.0 nomodify notrap
restrict internal mask 255.255.255.0 nomodify notrap
restrict networks mask 255.255.255.0 nomodify notrap
pool us.pool.ntp.org iburst preempt prefer
peer A iburst
peer B iburst
peer C iburst
peer D iburst
peer E iburst
peer F iburst
tos orphan 10
driftfile /var/lib/ntp/drift
###################################
On the cluster members X ... Z:
###################################
server A iburst prefer
server B iburst prefer
server C iburst prefer
server D iburst prefer
server E iburst prefer
server F iburst prefer
peer X iburst
peer Y iburst
peer Z iburst
tos orphan 12
restrict A nomodify notrap nopeer noquery
restrict B nomodify notrap nopeer noquery
restrict C nomodify notrap nopeer noquery
restrict D nomodify notrap nopeer noquery
restrict E nomodify notrap nopeer noquery
restrict F nomodify notrap nopeer noquery
restrict X nomodify notrap
restrict Y nomodify notrap
restrict Z nomodify notrap
restrict 127.0.0.1
restrict default ignore
driftfile /var/lib/ntp/drift
###################################
The stratums for the tos orphan were chosen kind of arbitrarily.
--
Florin Andrei
http://florin.myip.org/
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