Issues seen with physically rebooting OLT (power-cycle)

Noticed following issues with OLT reboot on a successful installed SEBA POD

• Rebooted OLT after a successful authentication/DHCP and Ping, pings failed after OLT reboot and ONU states was shown as UNKNOWN in GUI
• ONOS did not show any respective flows for the OLT. UNI ports were missing.
• But OLT/ONU states were shown fine in the VOLTHA
• ATT Service instances do not come up until `device-remove` remove is performed in ONOS
• Noticed that after `device-remove` , flows on the OLT show EAPOL as if authentication needed to be performed for the existing subscriber

Logs from ONOS

onos> devices
id=of:000000000ac004ce, available=true, local-status=connected 18m49s ago, role=MASTER, type=SWITCH, mfr=VOLTHA Project, hw=, sw=, serial=10.192.4.206:9191, chassis=ac004ce, driver=voltha, channelId=10.233.71.61:51
894, locType=none, managementAddress=10.233.71.61, name=olt-1, protocol=OF_13
id=of:0000cc37ab5b6da8, available=true, local-status=connected 10h23m ago, role=MASTER, type=SWITCH, mfr=Accton Corp., hw=x86-64-accton-as6712-32x-r0, sw=ofdpa 3.0.5.5+accton1.7-1, serial=671232X1534021, chassis=cc
37ab5b6da8, driver=ofdpa3, channelId=10.233.102.128:57408, locType=none, managementAddress=10.233.102.128, name=Fabric Switch - 1, protocol=OF_13
onos>

onos> ports -e
id=of:000000000ac004ce, available=true, local-status=connected 21m59s ago, role=MASTER, type=SWITCH, mfr=VOLTHA Project, hw=, sw=, serial=10.192.4.206:9191, chassis=ac004ce, driver=voltha, channelId=10.233.71.61:51
894, locType=none, managementAddress=10.233.71.61, name=olt-1, protocol=OF_13
port=65536, state=enabled, type=fiber, speed=0 , adminState=enabled, portMac=00:00:00:01:00:00, portName=nni-65536
id=of:0000cc37ab5b6da8, available=true, local-status=connected 10h26m ago, role=MASTER, type=SWITCH, mfr=Accton Corp., hw=x86-64-accton-as6712-32x-r0, sw=ofdpa 3.0.5.5+accton1.7-1, serial=671232X1534021, chassis=cc
37ab5b6da8, driver=ofdpa3, channelId=10.233.102.128:57408, locType=none, managementAddress=10.233.102.128, name=Fabric Switch - 1, protocol=OF_13
port=1, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port1
port=2, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port2
port=3, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port3
port=4, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port4
port=7, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port7
port=8, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port8

onos> device-remove of:000000000ac004ce
onos> ports -e
id=of:000000000ac004ce, available=true, local-status=connected 7s ago, role=MASTER, type=SWITCH, mfr=VOLTHA Project, hw=, sw=, serial=10.192.4.206:9191, chassis=ac004ce, driver=voltha, channelId=10.233.71.61:55226,
locType=none, managementAddress=10.233.71.61, name=olt-1, protocol=OF_13
port=16, state=enabled, type=fiber, speed=0 , adminState=enabled, portMac=08:00:00:00:00:10, portName=ALPHe3d1cfa7
port=65536, state=enabled, type=fiber, speed=0 , adminState=enabled, portMac=00:00:00:01:00:00, portName=nni-65536
id=of:0000cc37ab5b6da8, available=true, local-status=connected 10h27m ago, role=MASTER, type=SWITCH, mfr=Accton Corp., hw=x86-64-accton-as6712-32x-r0, sw=ofdpa 3.0.5.5+accton1.7-1, serial=671232X1534021, chassis=cc
37ab5b6da8, driver=ofdpa3, channelId=10.233.102.128:57408, locType=none, managementAddress=10.233.102.128, name=Fabric Switch - 1, protocol=OF_13
port=1, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port1
port=2, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port2
port=3, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port3
port=4, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port4
port=7, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port7
port=8, state=enabled, type=fiber, speed=40000 , adminState=enabled, portMac=cc:37:ab:5b:6d:a9, portName=port8

onos> flows -s
deviceId=of:000000000ac004ce, flowRuleCount=3
ADDED, bytes=0, packets=0, table=0, priority=10000, selector=[IN_PORT:16, ETH_TYPE:eapol], treatment=[immediate=[OUTPUT:CONTROLLER]]
ADDED, bytes=0, packets=0, table=0, priority=10000, selector=[IN_PORT:65536, ETH_TYPE:ipv4, IP_PROTO:17, UDP_SRC:67, UDP_DST:68], treatment=[immediate=[OUTPUT:CONTROLLER]]
ADDED, bytes=0, packets=0, table=0, priority=10000, selector=[IN_PORT:65536, ETH_TYPE:lldp], treatment=[immediate=[OUTPUT:CONTROLLER]]
deviceId=of:0000cc37ab5b6da8, flowRuleCount=65
ADDED, bytes=0, packets=0, table=10, priority=32768, selector=[IN_PORT:2, VLAN_VID:4090], treatment=[transition=TABLE:20]
ADDED, bytes=0, packets=0, table=10, priority=32768, selector=[IN_PORT:1, VLAN_VID:4094], treatment=[transition=TABLE:20]