NTP

NTP Servers

time[1-3].ventureresearch.com

time1 through time3 are set up on vm-linux-prod, embedded-prod, embedded-dev respectively. These should be used for any external device deployments.

You can use this ntp.conf:

# This is the most basic ntp configuration file
# The driftfile must remain in a place specific to this
# machine - it records the machine specific clock error
driftfile /etc/ntp.drift
# This obtains a random server which will be close
# (in IP terms) to the machine.  Add other servers
# as required, or change this.
server time1.ventureresearch.com
server time2.ventureresearch.com
server time3.ventureresearch.com
# Using local hardware clock as fallback
# Disable this when using ntpd -q -g -x as ntpdate or it will sync to itself
server 127.127.1.0
fudge 127.127.1.0 stratum 14
# Defining a default security setting
restrict default

# loosen up the restrictions
tos maxdist 10

unit updating

• Check the current offset:

ntpdate -uq pool.ntp.org 

• Install ntpq:

[ ! -x /usr/bin/ntpq ] && opkg install ntp-bin

• Look at peers - if it is only LOCAL or there is one server that is bad!

ntpq -p

• Copy new ntp.conf file:

scp venture@10.19.6.1:~/ntp.conf.cellular /etc/ntp.conf

• Restart ntp:

/etc/init.d/ntpd restart

• Check peers again, look for VR IPs (216.74..., 209.253...)

ntpq -p

• After a minute or three, check time again, it should match.

ntpdate -uq  pool.ntp.org