Out of Sync Errors

[navneet_78]

iam getting errors " NTP sync is lost " on the Router. How do i resolve this??

Feb 18 09:31:21 GMT: %NTP-5-PEERSYNC: NTP synced to peer 192.35.38.141

Feb 18 12:38:46 GMT: %NTP-4-UNSYNC: NTP sync is lost

Feb 18 12:39:46 GMT: %NTP-5-PEERSYNC: NTP synced to peer 192.35.38.41

Feb 18 12:39:46 GMT: %NTP-6-PEERREACH: Peer 192.35.38.41 is reachable

Feb 18 12:39:50 GMT: %NTP-6-PEERREACH: Peer 192.35.38.141 is reachable

Feb 18 21:48:48 GMT: %NTP-5-PEERSYNC: NTP synced to peer 192.35.38.41

Feb 19 00:55:51 GMT: %NTP-5-PEERSYNC: NTP synced to peer 192.35.38.41

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This error is coming quite often in irregular intervals.

[Richard Burts]

Navneet

I had very similar symptoms where routers would report sync lost and sync to server. I opened a case with Cisco TAC about it but was not able to identify the cause. I upgraded the IOS to a new version and this symptom stopped. What version of IOS are you running when you see this?

HTH

Rick

[navneet_78]

Iam using a 12.3 version. Is there no other alternative to these errors?

[Richard Burts]

Navneet

I would suggest that you try a later version of 12.3 (that solved it for me) or you might consider opening a case with Cisco TAC on this issue and see what they suggest.

HTH

Rick

[suresh natarajan]

Hi ,

I am often getting this kind of log in my router. how can i stop or what its meaning this? it doesn't say sync lost and all.

Sep  3 05:51:53: %NTP-5-PEERSYNC: NTP synced to peer 10.1.1.4

Sep  3 05:51:53: %NTP-6-PEERREACH: Peer 10.1.1.4 is reachable

Sep  3 05:52:10: %NTP-5-PEERSYNC: NTP synced to peer 15.19.100.103

Sep  3 05:52:10: %NTP-6-PEERREACH: Peer 15.19.100.103 is reachable

Sep  3 05:52:13: %NTP-6-PEERREACH: Peer 15.19.100.102 is reachable

If you some know , please reply thanks.

Regards,

Suresh

[Richard Burts]

Suresh

What model of router is this and what version of IOS is it running?

Are you getting any indication of issues with NTP? If you periodically issue the show ntp status command, does it show that the NTP peer is in sync or does it indicate any issue?

As I have said in previous posts in this thread I have seen log messages about this periodically lling peer information when there is no real problem with NTP.  My suggestion would be to upgrade to a different version of code and see if the log messages change.

HTH

Rick