Cisco Switch went offline and came back online. No issues seen in logs

[Ranamohit54]

Hi Team

Please answer to me considering i am a fresher working as a Network Engineer.

We have a switch which went offline at one of the site of our customer. based on our monitoring it went offline and but eventually it came a back online after a while .

I have checked the switch uptime , its more than an year . I cant seems to find any logs within the switch to why it went offline . can you please let me know what checks can i do remotely . Please answer considering i am a fresher still in learning phase

[Ranamohit54]

Uptime
1 year, 16 weeks, 5 days, 2 hours, 35 minutes
Uptime for this control processor is 1 year, 16 weeks, 5 days, 2 hours, 37 minutes
System returned to ROM by Power Failure or Unknown at 09:33:50 nz Fri Mar 31 2023
System restarted at 12:22:10 Pacific Mon Apr 3 2023.
!
Logs are as below for today
303304: Jul 28 14:15:34.792: NTP Core (INFO): 0.0.0.0 C62C 0C clock_step
303305: Jul 28 14:15:34.793: NTP Core (NOTICE): Clock synchronization lost.
303306: .Jul 28 14:23:17.792: NTP Core (INFO): 10.128.0.1 8035 85 restart timeout
303307: .Jul 28 14:29:49.792: NTP Core (INFO): 10.128.0.1 8044 84 reachable
303308: .Jul 28 14:29:49.793: NTP Core (INFO): 10.128.0.1 965A 8A sys_peer
303309: .Jul 28 14:29:49.793: NTP Core (NOTICE): Clock is synchronized.

[Leo Laohoo]

What is the model of the switch?

[balaji.bandi]

We have a switch which went offline at one of the site of our customer. based on our monitoring it went offline and but eventually it came a back online after a while .

as per the information, the switch was up for several days, so this could IP connectivity issue between your NMS and device.

or as per the output device it self lost IP connectivity to reach other part of the network.