Hello all!
May be someone have faced with the same problem.
I have a virtual-chassis from two EX4600 switches with 3 expansion modules (EX4600-EM-8F)
>show virtual-chassis
Preprovisioned Virtual Chassis
Virtual Chassis ID: 658d.d87e.4b80
Virtual Chassis Mode: Enabled
Mstr Mixed Route Neighbor List
Member ID Status Serial No Model prio Role Mode Mode ID Interface
1 (FPC 1) Prsnt TC3717030047 ex4600-40f 129 Master* N VC 2 vcp-255/0/24
2 vcp-255/0/25
2 (FPC 2) Prsnt TC3717030140 ex4600-40f 129 Backup N VC 1 vcp-255/0/24
1 vcp-255/0/25
> show chassis fpc pic-status
Slot 1 Online EX4600-40F
PIC 0 Online 24x10G-4x40G
PIC 1 Online EX4600-EM-8F
PIC 2 Online EX4600-EM-8F
Slot 2 Online EX4600-40F
PIC 0 Online 24x10G-4x40G
PIC 1 Online EX4600-EM-8F
When I tried to add fourth expansion module, my backup switch became offline and dissapeared from a chassis. When I removed this additional module, a switch became online. Is that problem of a switch or a module? I created a case in JTAC, but they will solve this case after weekend.