glusterd is intermittently not starting up during reboot

Issue

During reboots, glusterd may not start with the following 'Network is unreachable' error:

[2016-09-16 13:42:11.023424] I [MSGID: 106513] [glusterd-store.c:2071:glusterd_restore_op_version] 0-glusterd: retrieved op-version: 30712
[2016-09-16 13:42:12.394043] I [MSGID: 106498] [glusterd-handler.c:3640:glusterd_friend_add_from_peerinfo] 0-management: connect returned 0
[2016-09-16 13:42:12.419668] I [rpc-clnt.c:984:rpc_clnt_connection_init] 0-management: setting frame-timeout to 600
[2016-09-16 13:42:12.424096] W [socket.c:984:__socket_keepalive] 0-socket: failed to set TCP_USER_TIMEOUT -1000 on socket 13, Invalid argument
[2016-09-16 13:42:12.424122] E [socket.c:3091:socket_connect] 0-management: Failed to set keep-alive: Invalid argument
[2016-09-16 13:42:12.424586] E [socket.c:3147:socket_connect] 0-management: connection attempt on  failed, (Network is unreachable)