Updation from R410.1 to R410.2 and now DSA no longer works. Both servers are on the same release R410.2 but ServerB will not communicate at all with other DSA servers. ServerA is working correctly. When a ping is done to the other DSA Servers it fails, but works with IP address.
Based on my experience it may caused because of The installation cleared out the Default gateway address from serverB. Add the correct Default address back and reboot. This fixed this issue