HA config sync issue in lab

Thanks for help!!

But both these virtual appliances are on same VM so I assume time is in sync. I am currently unable to add internet connectivity to my appliances. Is defining NTP is mandatory?

Thanks Hemant

Your configuration synchronization (ConfigSync) operation may not function properly if the network time protocol (NTP) server is not configured on all the devices in a device group.

Configuring an NTP server is required for all device group members. If a BIG-IP system with no defined NTP server is added to a device group, the device group members may fail to synchronize their configuration, and the system in which no NTP server is configured will log the listed error message.

Refer--->https://support.f5.com/csp/article/K51323327

Ok, so I have now defined external NTP servers in both the device but problem remains same.

Device trust group remains in sync where as failover group is not able to sync.

Below are the logs from current active.

Mon Dec 24 11:40:00 IST 2018noticebigip1mcpd[4237]0107168eUnable to do incremental sync, reverting to full load for device group /Common/device-group-failover-2c1fa5e3ab07 device %cmi-mcpd-peer-/Common/bigip2.test.com from commit id { 30 6638437165593595024 /Common/bigip2.test.com } to commit id { 731 6638437410619421304 /Common/bigip1.test.com }. Mon Dec 24 11:40:05 IST 2018noticebigip1mcpd[4237]0107168eUnable to do incremental sync, reverting to full load for device group /Common/device-group-failover-2c1fa5e3ab07 device %cmi-mcpd-peer-/Common/bigip2.test.com from commit id { 30 6638437165593595024 /Common/bigip2.test.com } to commit id { 731 6638437410619421304 /Common/bigip1.test.com }. Mon Dec 24 11:40:40 IST 2018noticebigip1mcpd[4237]0107168eUnable to do incremental sync, reverting to full load for device group /Common/device-group-failover-2c1fa5e3ab07 device %cmi-mcpd-peer-/Common/bigip2.test.com from commit id { 30 6638437165593595024 /Common/bigip2.test.com } to commit id { 731 6638437410619421304 /Common/bigip1.test.com }. Mon Dec 24 11:40:57 IST 2018noticebigip1mcpd[4237]0107168eUnable to do incremental sync, reverting to full load for device group /Common/device-group-failover-2c1fa5e3ab07 device %cmi-mcpd-peer-/Common/bigip2.test.com from commit id { 30 6638437165593595024 /Common/bigip2.test.com } to commit id { 731 6638437410619421304 /Common/bigip1.test.com }. Mon Dec 24 11:41:01 IST 2018noticebigip1mcpd[4237]0107168eUnable to do incremental sync, reverting to full load for device group /Common/device-group-failover-2c1fa5e3ab07 device %cmi-mcpd-peer-/Common/bigip2.test.com from commit id { 30 6638437165593595024 /Common/bigip2.test.com } to commit id { 731 6638437410619421304 /Common/bigip1.test.com }.