snapmirror replication transfer failed to complete

Snapmirror failed to update while giving the error replication transfer failed to complete.

I have checked everything on both source and destination.It is s VSM relationship and space,hosts entry,ontap version,snapmirror.conf entry,host access are not the issues.

I am not able to telnet filer to filer on 10566 to check port status.

Any ideas?

Data ONTAP Release 8.1.2P4 7-Mode --------Destination

Data ONTAP Release 7.3.7P3  -------------------Source