The following may be suitable:
set chassis aggregated-devices ethernet device-count 1
set interfaces ae0 aggregated-ether-options lacp active
set interfaces ae0 unit 0 family inet address 192.168.100.254/24
set interfaces ge-2/0/0 gigether-options 802.3ad ae0
set interfaces ge-2/0/1 gigether-options 802.3ad ae0
set security zones security-zone trust interface ae0 host-inbound-traffic system-services all
You can instead define a vlan instead and attach this to your ae0.0:
set chassis aggregated-devices ethernet device-count 1
set interfaces ae0 aggregated-ether-options lacp active
set interfaces ae0 unit 0 family ethernet-switching port-mode trunk vlan members all
set interfaces ae0 unit 0 family ethernet-switching native-vlan-id 100
set interfaces ge-2/0/0 gigether-options 802.3ad ae0
set interfaces ge-2/0/1 gigether-options 802.3ad ae0
set interfaces vlan.100 family inet 192.168.100.254/24
set vlans vlan100 vlan-id 100 l3-interface vlan.100
set security zones security-zone trust interface vlan.100 host-inbound-traffic system-services all
For the above make sure you have a trust intra-zone security policy permitting traffic.
"show lacp interfaces" will show your ae0 status (in this case it is down):
Aggregated interface: ae0
LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity
ge-2/0/0 Actor No Yes No No No Yes Fast Active
ge-2/0/0 Partner No Yes No No No Yes Fast Passive
ge-2/0/1 Actor No Yes No No No Yes Fast Active
ge-2/0/1 Partner No Yes No No No Yes Fast Passive
LACP protocol: Receive State Transmit State Mux State
ge-2/0/0 Defaulted Fast periodic Detached
ge-2/0/1 Port disabled No periodic Detached
Hope this helps!
mikevaus