Hi,
from what I see you are expecting the fe-0/0/3 port to be able to reach 192.168.100.1 as directly connected. In this case you are mixing switched ports with layer3-termination on physical interfaces.
To get it working i would suggest something like this config (can be with errors as it has been written in hand without cli validation):
delete interface fe-0/0/3
delete interface fe-0/0/4
set interface fe-0/0/3.0 family ethernet-switching vlan members vlan100
set interface fe-0/0/4.0 family ethernet-switching port-mode trunk
set interface fe-0/0/4.0 family ethernet-switching vlan members vlan100
set interface fe-0/0/4.0 family ethernet-switching vlan members vlan10
set vlans vlan100 l3-interface vlan.100
set vlans vlan10 l3-interface vlan.10
set interface vlan.10 family inet address 172.16.10.1/24
set interface vlan.100 family inet address 192.168.100.1/24
Changes done:
- delete all previous config from fe-0/0/3 and fe-0/0/4
- changes fe-0/0/4 to a switching trunk port with vlan10 and vlan100.
- changes fe-0/0/3 to a switching access port in vlan 100
- created two layer3 vlan-interfaces and attached them to a vlan
Also remember to change security zones to match vlan.XX interfaces instead of logical interfaces on fe-0/0/4.
Let us know how you progress and if other issues arises 🙂