We have ex2200-48p-4g 4-member VC.
show virtual-chassis
Preprovisioned Virtual Chassis
Virtual Chassis ID: 53c4.a597.02bb
Virtual Chassis Mode: Enabled
Mstr Mixed Route Neighbor List
Member ID Status Serial No Model prio Role Mode Mode ID Interface
0 (FPC 0) Prsnt CT********79 ex2200-48p-4g 129 Master* NA VC 1 vcp-255/1/2
2 vcp-255/1/3
1 (FPC 1) Prsnt CT********70 ex2200-48p-4g 129 Backup NA VC 0 vcp-255/1/2
3 vcp-255/1/3
2 (FPC 2) Prsnt CT********46 ex2200-48p-4g 0 Linecard NA VC 3 vcp-255/1/2
0 vcp-255/1/3
3 (FPC 3) Prsnt CT********45 ex2200-48p-4g 0 Linecard NA VC 1 vcp-255/1/2
2 vcp-255/1/3
After Junos downgrading from 15.1R5-S3.4 to 12.3R12-S7 LACP on sfp uplinks stopped working.
show lacp interfaces ae32 error: device ae32 not found
Booting VC back to 15.1R5-S3.4 from alternate slice brings LAG on sfp ports back...
show lacp interfaces ae32
Aggregated interface: ae32
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
ge-0/1/0 Actor No No Yes Yes Yes Yes Fast Active
ge-0/1/0 Partner No No Yes Yes Yes Yes Fast Active
ge-1/1/0 Actor No No Yes Yes Yes Yes Fast Active
ge-1/1/0 Partner No No Yes Yes Yes Yes Fast Active
LACP protocol: Receive State Transmit State Mux State
ge-0/1/0 Current Fast periodic Collecting distributing
ge-1/1/0 Current Fast periodic Collecting distributingLACP on regular copper ports (PIC 0 48x 10/100/1000 Base-T) works fine in both Junos versions.