Failed to migrate VM to the upgrade host Red Hat Virtualization Host 4.1 (el7.4)?

Issue

• After upgrading the host to latest RHVH 4.1 Red Hat Virtualization Host 4.1 (el7.4), the VM migration fails with following error:

2017-08-15 12:01:05,940-0700 INFO  (migsrc/9bc74b77) [virt.vm] (vmId='<vm_id>') starting migration to qemu+tls://<hostname>/system with miguri tcp://<hostname> (migration:480)
2017-08-15 12:01:05,947-0700 ERROR (migsrc/9bc74b77) [virt.vm] (vmId='<vm_id>') operation failed: Failed to connect to remote libvirt URI qemu+tls://<hostname>/system: unable to connect to server at '<hostname>:16514': No route to host (migration:287)
2017-08-15 12:01:06,018-0700 INFO  (jsonrpc/7) [vdsm.api] START migrate(params={u'incomingLimit': 1, u'src': u'<hostname>', u'dstqemu': u'<hostname>', u'autoConverge': u'true', u'tunneled': u'false', u'enableGuestEvents': True, u'dst': u'<hostname>:54321', u'convergenceSchedule': {u'init': [{u'params': [u'100'], u'name': u'setDowntime'}], u'stalling': [{u'action': {u'params': [u'150'], u'name': u'setDowntime'}, u'limit': 1}, {u'action': {u'params': [u'200'], u'name': u'setDowntime'}, u'limit': 2}, {u'action': {u'params': [u'300'], u'name': u'setDowntime'}, u'limit': 3}, {u'action': {u'params': [u'400'], u'name': u'setDowntime'}, u'limit': 4}, {u'action': {u'params': [u'500'], u'name': u'setDowntime'}, u'limit': 6}, {u'action': {u'params': [u'5000'], u'name': u'setDowntime'}, u'limit': -1}, {u'action': {u'params': [], u'name': u'abort'}, u'limit': -1}]}, u'vmId': u'<vm_id>', u'abortOnError': u'true', u'outgoingLimit': 1, u'compressed': u'true', u'method': u'online', 'mode': 'remote'}) from=::ffff:<IP>,43434 (api:46)
2017-08-15 12:01:06,021-0700 INFO  (jsonrpc/7) [vdsm.api] FINISH migrate return={'status': {'message': 'Migration in progress', 'code': 0}, 'progress': 0} from=::ffff:165.235.64.35,43434 (api:52)
2017-08-15 12:01:06,021-0700 INFO  (jsonrpc/7) [jsonrpc.JsonRpcServer] RPC call VM.migrate succeeded in 0.00 seconds (__init__:539)
2017-08-15 12:01:06,837-0700 ERROR (migsrc/9bc74b77) [virt.vm] (vmId='<vm_id>') Failed to migrate (migration:429)
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 411, in run
    self._startUnderlyingMigration(time.time())
  File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 487, in _startUnderlyingMigration
    self._perform_with_conv_schedule(duri, muri)
  File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 563, in _perform_with_conv_schedule
    self._perform_migration(duri, muri)
  File "/usr/lib/python2.7/site-packages/vdsm/virt/migration.py", line 529, in _perform_migration
    self._vm._dom.migrateToURI3(duri, params, flags)
  File "/usr/lib/python2.7/site-packages/vdsm/virt/virdomain.py", line 69, in f
    ret = attr(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 123, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 941, in wrapper
    return func(inst, *args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1939, in migrateToURI3
    if ret == -1: raise libvirtError ('virDomainMigrateToURI3() failed', dom=self)
libvirtError: operation failed: Failed to connect to remote libvirt URI qemu+tls://<hostname>/system: unable to connect to server at '<hostname>:16514': No route to host