New to opnsense but I feel have a reasonable grasp of the networking fundamentals of what's going on.
I'm working from what seems to be a poplular set of instructions from homenetworkguy
I have opnsense running on a 4-port minipc. I have 3 of the ports configured as follows:
igc0 - WAN - plugged into my AT&T modem/router
igc1 - LAN - plugged into port 1 on my switch
igc2 - the parent for all VLAN traffic - plugged into port 8 on my switch
I have a handful of VLAN tags configured but I'm just trying to test one of them, tag 20.
20 - vlan02
50 - vlan05
On the switch I have it configured as follows:
ports 1, 2, untagged LAN (Switch calls this VLAN 1) - When I plug in to port 2 I get an IP in the LAN IP block and can access the internet as expected
port 3, untagged VLAN 20 with PVID set to 20
ports 4-7, untagged VLAN 50 with PVID set to 50
port 8, tagged with all VLANs enabled, PVID set to 1
When I plug in to port 3 on the switch (VLAN 20) I don't get an IP.
I found the opnsense interface to do a pcap on vlan02 and igc2.
At no point in anything I've tried do I see any packets captured on vlan02 at all.
On igc2 I do see DHCP broadcasts tagged with vlan 20 so it seems like the switch is configured correctly and adding the vlan tag and sending it out port 8 to the router. Nothing is responding on the router and, as I mentioned, nothing is showing up on vlan02 (TAG 20). I'm guessing I've misconfigured opnsense somewhere.
I tried manually setting the IP to 192.168.20.99/255.255.255.0 with 192.168.20.1 as the gateway.
Tried to ping 192.168.20.1. I see in igc2 a bunch of ARP requests coming in tagged as VLAN 20 as expected.
I tried taking the switch out of the equation. I configured my client to use VLAN 20 and plugged it directly into eth2/igc2. Seeing the exact same behavior. DHCP requests with VLAN 20 show up on the pcap. Manually setting the IP, I see ARPs with VLAN 20 tagged.
In the screen shots I grabbed VLAN50 but VLAN 20 is configured the same with just different IP ranges.
Ok, it seems like I'm limited to only 256kb in total images on the entire thread so I've uploaded pictures here instead:
https://imgur.com/a/DTmy9fx
Someone on Discord was able to help me out. There wasn't anything wrong with the configuration. I just had to click apply everywhere one more time to make it extra applied.