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Ah, as simple dont do ifconfing again or destroy :)
so simple 09-script in erly scripts to do networking and well either - fix php (interfaces.inc or/and interfaces.lib.inc) or make a ifconfing - relly a /bin/sh script to
exit 0 when touching my "special" interfaces
or
do work when other stuff when really needed, but, well not a nice thing to do, my KVM and SR-IOV does not like my OPNSense.

i whould do some tests with ha and speed vs cpu usage - or when do packets drop - but well - i really like my SR-IOV :) - maybe time to upgrade KVM, bios of my DELLS and my Intel firmware to see if it is fixed in layer above, as very normal thing to do in vm-guest host - ifconfig up, or ifconfig destroy. :)

Thanks again for your time on this,.

Nope, this is not dedicated for OPNSense.
I've got there vyos, vyatta (versions differ, and ages apart), vSRX and some linux host (just to test as machine inside).
vSRX obviouse - uses the SR-IOV and DPDK, OPNSense "only" as VF taken down.

Simply i do search why - it do works like that.

networking stops - if i go to single user (simply S as boot) and setup network, then exit - OPNSense goes up with very same config.

my "lan" and "wan" are more like this: APP ( n x vlans, MGMT, storage vlan - not used there, internet - i do have a tiny /24 and ASN on my own)

if only bridge is supported, then what the heck, whould use a bride.

Any way - is there a doc saying - how do i test every step in config - step by step i whould like to pass dome "DEBUG" flag to startup scripts - maybe some offload or anything fancy being setup, i've tested and i can easy reproduce this behavior in this (25.7) and prefious one version of OPNSense.

also: i've got TWO cards, with 10G so - i whould then give a try for LAGG (redundancy, not - speed).

in terms of speed my needs are modest, 300 Mbps "at peek" x 2 ( 300 in and 300 out) traffic is symetrical, small packets (VoIP mostly).

thanks for your time on this, yeap this is perfectly FBSD:

<code> fconfig ixv0.4123 create vlan 4123 vlandev ixv0 inet 172.41.23.1/16 up </code>

but opnsense tries to do this:
<code>root@:/ # ifconfig ixv0_vlan4030 inet 172.30.0.246/16 up
ifconfig: interface ixv0_vlan4030 does not exist
root@:/ #
root@:/ # ifconfig ixv0_vlan4033 create vlan 4033 vlandev ixv0
ifconfig: SIOCIFCREATE2 (ixv0_vlan4033): Invalid argument
root@:/ # ifconfig ixv0
ixv0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
        options=4e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6,HWSTATS,MEXTPG>
        ether 52:54:00:e8:7a:fc
        inet 192.168.252.252 netmask 0xffffffff broadcast 192.168.252.252
        media: Ethernet autoselect (10Gbase-T <full-duplex>)
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
root@:/ # ifconfig ixv0_vlan4030 create vlan 4030 vlandev ixv0
ifconfig: SIOCIFCREATE2 (ixv0_vlan4030): Invalid argument
root@:/ # ifconfig ixv0.vlan4030 create vlan 4030 vlandev ixv0
ifconfig: invalid vlan tag
root@:/ # ifconfig ixv0.4030 create vlan 4030 vlandev ixv0
ixv0: link state changed to DOWN
ixv0: link state changed to UP
root@:/ #
</code>

so interfaces named like ixv0_vlan4030 are bad idea for fBSD imvho.

no, i cant do anything in GUI as i need gui to configure, as this is KVM so i do have - a serial console and CLI (and that is fine) - simply vlan config from there is not working.

do i need to vi /conf/config.xml ? i really whould like not to, but what the heck, could try.

Hello i do have a clean:
OPNsense-25.7-serial-amd64.img.bz2                 22-Jul-2025 07:12 

i do have a SRV-IO capable interface, a KVM/QEMU hypervisor

i do see in hyperbvisor an interface
06:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
06:00.1 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
i see functions

06:10.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
06:10.1 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
(..)
06:10.7 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)

I could use any linux and bind to any VF.
I could install a vSRX demo and use VF. So - i assume my network is working, i do see vlans.

But when i install opnsense i see only unttaged traffic on ixv0, i see info from my switch like name from my switch - so i thing - my network works.

so in cli, in single user mode i just say:

# ifconfig ixv0.4123 create vlan 4123 vlandev ixv0 inet 172.41.23.1/16 up

i do have woking devices in 4123 vlan (also on same hypervisor with same PF, on a different VF but - running linux os)

but - i dont see any traffic that is tagged with - any vlan (even vlan 1)

Any hints, what should i check, even is this connifg supported or working (passing down one VF from hypervisor to VM inside) ?
Maybe i do need to paste any sniplets, condfig, dmesg etc ?