Why brick ports changed after configuring I/O and management encryption in Red Hat Gluster Storage 3.1 ?

Issue

• Why brick ports changed after configuring I/O and management encryption in Red Hat Gluster Storage 3.1 ?

~snippet from glusterd logs,

var/log/glusterfs/etc-glusterfs-glusterd.vol.log:[2016-01-26 10:43:00.906060] I [MSGID: 106144] [glusterd-pmap.c:274:pmap_registry_remove] 0-pmap: removing brick /bricks/brick_pv01-test/brick_pv01-test-_lv01 on port 49170

~snippet from mount logs,

media-pv01-test.log:[2016-01-26 16:18:41.150149] I [rpc-clnt.c:1851:rpc_clnt_reconfig] 0-pv01-test-client-1: changing port to 49170 (from 0)
media-pv01-test.log:[2016-01-26 16:18:42.176595] I [rpc-clnt.c:1851:rpc_clnt_reconfig] 0-pv01-test-client-0: changing port to 49170 (from 0)
media-pv01-test.log:[2016-01-26 16:18:45.404244] I [rpc-clnt.c:1851:rpc_clnt_reconfig] 0-pv01-test-client-1: changing port to 49170 (from 0)