We have configured our Core Router 7206 as NTP master which provides clocking to all the network devices (around 3000 devices ) in our Network.
NTP Source IP on the router is the GiG Interface, but we are facing a problem on it that the router always falls behind 5 to 10 mins of the current time.
We always have to correct it after 3 to 4 days.
when we check the NTP status it shows syncronized but it still falls behind.
Kindly suggest any workaround so that the router clock does not fall behind.