#set chassis aggregated-devices ethernet device-count 5 < number of ae interfaces want to create between srx and cisco>
#set interfaces ae0 aggregated-ether-options lacp active < dynamic monitor the LAG>
# set interfaces ge-1/0/0 gigether-options 802.3ad ae0 < bindign the phyical interfaces into ae>
# set interfaces ge-2/0/0 gigether-options 802.3ad ae0
#set interface ae0 vlan-tagging unit 100 vlan-id 100 family inet address 10.0.0.1/30 < vlan tagging and sub interface configuration and binding the ip address>
#set interface ae0 vlan-tagging unit 200 vlan-id 200 family inet address 20.0.0.1/30
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/interfaces-layer3-subinterfaces-qfx-series-cli.html
https://www.juniper.net/documentation/en_US/junos/topics/concept/interfaces-layer3-subinterfaces-ex-series.html