After upgrade from CUCM 8.5 to 8.6,NTP server causes database replication issues

[Junhua Chen]

When  I upgrade CUCM from 8.5 version to 8.6,database report show pub status is 2--good, sub status is 0--initializing,then I try to rebooted the sub server,but issue persist,then I also try below step to try to fix the problem,but fail;

1/utils dbreplication stop on sub

2/utils dbreplication stop on pub

3/utils dbreplication reset all on pub

So,how can I do other troubleshooting steps?please help!

[Aman Soi]

Hi ,

NTP could be the issue.

it is showing at Stratum 11 in Pub.

regds,

aman

[Jonathan Schulenberg]

The publisher must be synchronized to an NTPv4 server - not Windows which only offers SNTP - in stratum three or better. Cisco has configured the OS to consider anything lower than stratum five as unreliable. Since the subscriber gets time from the pub then it cannot be lower than:

• source (stratum 3)
  • CUCM Publisher (stratum 4)
    • CUCM Subscribers (stratum 5)

Fix NTP and then try cleaning up the replication.

https://supportforums.cisco.com/document/52421/troubleshooting-cucm-database-replication-linux-appliance-model