Forum Discussion
Daniel_Ao_10370
Nimbostratus
NimbostratusNTP Server Health Monitor
I would like to load balance my internal NTP servers in BIGIP. How to monitor NTP service in F5?
In addition, I found that there is an udp monitor in BIGIP, how does udp monitor works?
bruce__12158Nimbostratus
NimbostratusPosted By Danny Trinh on 06/08/2009 2:47 PM
and replace "nslookup..." line with "ntpdate -q $node_ip | grep adjust > /dev/null 2>&1"
I found (at least on v10.0.1) that it was better to check on the exit errorlevel to see if a node was responding correctly.
"ntpdate -q $node_ip"
status=$?
It's also advisable to use simple persistence across NTP nodes rather than RR etc. NTP clients typically send 3 requests in quick succession, you want all of these to arrive at the same host to avoid jitter which will make your client untrust the source.
