Junos OS

Using the below config I wanted to mirror port ge-0/1/0.0 to ge-0/1/1.0 and ge-0/1/2.0.
The commands used are:

set forwarding-options analyzer MyCapture1 input ingress interface ge-0/1/0.0
set forwarding-options analyzer MyCapture1 input egress interface ge-0/1/0.0
set forwarding-options analyzer MyCapture1 output vlan 999
set forwarding-options port-mirroring instance inst1 family ethernet-switching output vlan 999              
set vlans vlan999 vlan-id 999
set interfaces ge-0/1/1 unit 0 family ethernet-switching vlan members 999
set interfaces ge-0/1/2 unit 0 family ethernet-switching vlan members 999
set firewall family ethernet-switching filter f1 term t1 from interface ge-0/1/0.0
set firewall family ethernet-switching filter f1 term t1 then port-mirror-instance inst
set interfaces ge-0/1/1 unit 0 family ethernet-switching vlan members default
set interfaces ge-0/1/2 unit 0 family ethernet-switching vlan members default
set forwarding-options analyzer MyCapture1 output next-hop-group nhg1
set forwarding-options next-hop-group nhg1 group-type layer-2
set forwarding-options next-hop-group nhg1 interface ge-0/1/1.0
set forwarding-options next-hop-group nhg1 interface ge-0/1/2.0

Will it honour mirroring on layer2 next-hop-group nhg1?
or should I add port numbers ge-0/1/1.0 and ge-0/1/2.0 to vlan 999?

I followed the doc: 1:N Port Mirroring to Multiple Destinations on Switches | Junos OS | Juniper Networks