Forum Discussion
NimbostratusNTP Time Difference between Active and Passive Nodes
Hello,
I need some help. I have a two F5 (Active- Passive) and they are configured to have same NTP server. Active one is showing correct time, however the standby is showing 3 minutes of difference compare to the Active appliance. Even I sync the time manually, it slowly experience delay, and time difference start getting increased between both of the appliances.
Because of the 3 minutes differences, when I tried to sync the devices I get an warning saying that:
System Times of Devices Do Not Match One or more system times of the devices in the device trust do not match the system time of the local device.
Auto or manual device group sync operations may fail. Verify that the NTP Settings on all devices are properly configured and that the system times are equal.
/Common/f5-01 is 3 seconds ahead.
I have tried to query the ntp server from both appliance but that didn't work. According to result of Ntpq -np, both devices can reach and take time from NTP.
Is there anyone have the same problem before?
Thank you.
SnlCirrostratus
try below on standby device
verify the route for ntp server and its reachable via same as active device path
netstat -rn
tmsh list /sys management-route
tmsh show /net route
verify NTP sync
ntpq -np
finally try to restart the ntp daemon on standby device
bigstart restart ntpd
CananHi Snl,
Ntp server is reachable via management, path is the same in both appliance. I have tried to restart ntp daemon on both appliences but it didn't work.
Dario_GarridoNoctilucent
When the difference is too big, sometimes is not possible to synchronize. I recommend you to force the datetime manually and after that, try to check using NTP
https://support.f5.com/csp/article/K3381
BTW, you can check your NTP reachability with this command
# ntpdate -q <ntp_server_ip>
KR,
Dario.