So, about three months ago I set our 1751 router as the NTP server of our domain for both our AVVID phone system and our Microsoft Active Directory domain. Been working excellent up until last night. Our company's building had a power cycle and the router got rebooted. Not a huge issue, since it's actually been rebooted a couple of times since becoming the ntp server.
After it's reboot, the time somehow jumped ahead an hour according to all the devices that sync with it. Phone calls stopped working and Active Directory pretty much became useless.
I finally had to break all the devices off of syncing with the router and set them back to the way they were (phone servers sync with each other, active directory doesn't sync with anything externally). It took a few hours to get everything stable again, and I'm still working on parts this morning.
My concern is, why the heck the time jump ahead an hour on our Cisco Router?
Here's what I've had setup now for three months, we're in Central Standard Time:
ntp clock-period 17179971
ntp server 220.127.116.11
and I set the "clock timezone CDT -6"
It's been like that for three months and everything was fine till last night when it went out of wack.
Anyone seen this before, or anything like it with using a router as an NTP server?