Juniper. Восстановление сбойного стека EX2200 Virtual Chassis

Имеется стек из 4-х коммутаторов EX2200.
После перезагрузки перестал пинговаться и работать.

root@sw7> show virtual-chassis

Preprovisioned Virtual Chassis
Virtual Chassis ID: 5d8f.d099.8a4f
Virtual Chassis Mode: Enabled
                                           Mstr           Mixed Neighbor List
Member ID  Status   Serial No    Model     prio  Role      Mode ID  Interface
0 (FPC 0)  Inactive CT0216330160 ex2200-48p-4g 129 Linecard  NA  3  vcp-255/0/0
                                                                 1  vcp-255/0/1
1 (FPC 1)  Prsnt    CT0216330173 ex2200-48p-4g   0 Linecard  NA  0  vcp-255/0/0
2 (FPC 2)  Prsnt    CT0216330564 ex2200-48p-4g 129 Master*   NA  3  vcp-255/0/1
3 (FPC 3)  Prsnt    CT0216310214 ex2200-48p-4g   0 Linecard  NA  2  vcp-255/0/0
                                                                 0  vcp-255/0/1

Как видно, FPC 0 рабочая, но имеет статус Inactive.

root@sw7> show version
fpc0:
--------------------------------------------------------------------------
Hostname: sw7
Model: ex2200-48p-4g
JUNOS Base OS boot [12.3R9.4]
JUNOS Base OS Software Suite [12.3R9.4]
JUNOS Kernel Software Suite [12.3R9.4]
JUNOS Crypto Software Suite [12.3R9.4]
JUNOS Online Documentation [12.3R9.4]
JUNOS Enterprise Software Suite [12.3R9.4]
JUNOS Packet Forwarding Engine Enterprise Software Suite [12.3R9.4]
JUNOS Routing Software Suite [12.3R9.4]
JUNOS Web Management [12.3R9.4]
JUNOS FIPS mode utilities [12.3R9.4]

fpc1:
--------------------------------------------------------------------------
Hostname: sw7
Model: ex2200-48p-4g
JUNOS Base OS boot [12.3R12.4]
JUNOS Base OS Software Suite [12.3R12.4]
JUNOS Kernel Software Suite [12.3R12.4]
JUNOS Crypto Software Suite [12.3R12.4]
JUNOS Online Documentation [12.3R12.4]
JUNOS Enterprise Software Suite [12.3R12.4]
JUNOS Packet Forwarding Engine Enterprise Software Suite [12.3R12.4]
JUNOS Routing Software Suite [12.3R12.4]
JUNOS Web Management [12.3R12.4]
JUNOS FIPS mode utilities [12.3R12.4]

fpc2:
--------------------------------------------------------------------------
Hostname: sw7
Model: ex2200-48p-4g
JUNOS Base OS boot [12.3R12.4]
JUNOS Base OS Software Suite [12.3R12.4]
JUNOS Kernel Software Suite [12.3R12.4]
JUNOS Crypto Software Suite [12.3R12.4]
JUNOS Online Documentation [12.3R12.4]
JUNOS Enterprise Software Suite [12.3R12.4]
JUNOS Packet Forwarding Engine Enterprise Software Suite [12.3R12.4]
JUNOS Routing Software Suite [12.3R12.4]
JUNOS Web Management [12.3R12.4]
JUNOS FIPS mode utilities [12.3R12.4]

fpc3:
--------------------------------------------------------------------------
Hostname: sw7
Model: ex2200-48p-4g
JUNOS Base OS boot [12.3R12.4]
JUNOS Base OS Software Suite [12.3R12.4]
JUNOS Kernel Software Suite [12.3R12.4]
JUNOS Crypto Software Suite [12.3R12.4]
JUNOS Online Documentation [12.3R12.4]
JUNOS Enterprise Software Suite [12.3R12.4]
JUNOS Packet Forwarding Engine Enterprise Software Suite [12.3R12.4]
JUNOS Routing Software Suite [12.3R12.4]
JUNOS Web Management [12.3R12.4]
JUNOS FIPS mode utilities [12.3R12.4]

{master:2}

После ребута FPC 0 откатилась на бэкапную прошивку.
Для восстановления понадобится файл прошивки версии 12.3R12.4:
jinstall-ex-2200-12.3R12.4-domestic-signed.tgz

Консолью подключаемся к fpc0.
Подготавливаем порт на fpc1:

delete interfaces ge-1/0/2 unit 0 family ethernet-switching vlan members users
set interfaces ge-1/0/2 unit 0 family ethernet-switching vlan members mgmt

Подключаем ноут, даём ему адрес из management сети, и заливаем прошивку через SCP в директорию /var/tmp

root@sw7> file list /var/tmp

/var/tmp:
.snap/
gres-tp/
install/
jinstall-ex-2200-12.3R12.4-domestic-signed.tgz
pics/
rtsdb/
vi.recover/

Установка прошивки на fpc0:

request system software add /var/tmp/jinstall-ex-2200-12.3R12.4-domestic-signed.tgz member 0 reboot

Во время установки fpc0 сама два раза ребутнется, и без перезагрузки остальных нод кластер восстановится.