Buy or Renew
Buy or Renew
Cisco + Splunk: It’s a new day for your data. Learn more.
 
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
2639
Views
0
Helpful
1
Replies

NTP Error: failed validity tests

riverar
Level 1
Level 1

‎02-26-2008 06:02 AM - edited ‎03-05-2019 09:23 PM

Hi,

I have a very simple NTP config that consists of these commands:

ntp source vlan 210

ntp update-calendar

ntp server xxx.xxx.234.10 prefer

ntp server xxx.xxx.234.12

The clock remains unsynchronized. Host xxx.xxx.234.10 is a firewall that gets its time from an internet source. I've verified with our firewall team that there is a rule in place on their firewall to allow my router to get NTP from their firewall.

If I debug NTP, I get this error:

NTP: packet from xxx.xxx.234.10 failed validity tests 20

Peer/Server Clock unsynchronized

Anyone know what that means? I've tried looking it up and got no good tips.

Thanks in advanced for any help.

Labels:
0 Helpful
1 Reply 1

Richard Burts
Hall of Fame
Hall of Fame

‎02-26-2008 08:44 AM

Ron

According to some notes I have the NTP error code of 0x20 indicates Peer clock unsynchronized (common for unsynched server)

Is it possible that your firewall has lost NTP sync with its server?

HTH

Rick

HTH

Rick
0 Helpful
Customers Also Viewed These Support Documents
Review Cisco Networking products for a $25 gift card