FWIW, I have a VLAN tagged L3 interface on a LAG working on a SRX300 (remote end is a Cisco 3064):
me@somebox> show configuration interfaces ae10
vlan-tagging;
aggregated-ether-options {
lacp {
active;
periodic fast;
}
}
unit 10 {
vlan-id 10;
family inet {
address 10.10.0.2/24;
}
}
unit 20 {
vlan-id 20;
family inet {
address 10.20.0.2/24;
}
}
me@somebox> show lacp interfaces
Aggregated interface: ae10
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
ge-0/0/2 Actor No No Yes Yes Yes Yes Fast Active
ge-0/0/2 Partner No No Yes Yes Yes Yes Fast Active
ge-0/0/1 Actor No No Yes Yes Yes Yes Fast Active
ge-0/0/1 Partner No No Yes Yes Yes Yes Fast Active
LACP protocol: Receive State Transmit State Mux State
ge-0/0/2 Current Fast periodic Collecting distributing
ge-0/0/1 Current Fast periodic Collecting distributing