I have 2 ae channels one to a 3rd party switch and another to a 3rd party firewall; both show one of the physical ports as waiting; cannot get both channels to come up.

switch> show configuration | display set | match ae0
set interfaces ge-0/2/0 gigether-options 802.3ad ae0
set interfaces ge-0/2/1 gigether-options 802.3ad ae0
set interfaces ae0 description <host>
set interfaces ae0 aggregated-ether-options link-speed 1g
set interfaces ae0 aggregated-ether-options lacp active
set interfaces ae0 aggregated-ether-options lacp periodic slow
set interfaces ae0 aggregated-ether-options lacp link-protection
set interfaces ae0 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae0 unit 0 family ethernet-switching vlan members all

• After disabling Link Protection of Aggregated, we got both "childs" up and properly sending/receiving traffic.

• The feature mentioned above is to have a master and backup interface ("childs") while sending traffic over the lag.

Reference: Configuring Aggregated Ethernet Minimum Links