Nvidia Shield internet access on VLAN computer has not, anyone has explanation ?

[waldorf]

It is related to a long post from yesterday https://forum.opnsense.org/index.php?topic=44215.msg220486#msg220486
I try to narrow down what's happening but have no explanation yet for this behavior.

Related to the issue in the previous post I took a second Shield and put it on my desk (easier testing).  Connected it with a cable to an access port on the 192.168.3.x network.  The shield gets the following network config through DHCP:

IP 192.168.3.61
GW  192.168.3.1
DNS 192.168.3.1
subnet mask 255.255.255.0

It can play Netflix. I could install a browser through the playstore and search using Google.

Then disconnect the network cable, put the same cable into a (Windows 11) laptop. It gets the same network configuration via DHCP (Except IP address)
I can ping network devices in the same network (goes not via the firewall)
- Gateway ping does not work
- Browser does not work
- Ping on WAN IP addresses such as 8.8.8.8 does not work

Manually configured using another IP address, which was 1 higher than the Shield: no difference.

Somehow it seems related to the VLAN config in OPNsense, another VLAN just works.

I try to think of an explanation why quite some functionality on the Shield does work, but not on a computer.

Anyone an idea ?

[waldorf]

To answer my own question. It turned out it was caused by the "enable static ARP" which was enabled and which does a little bit more than only mapping IP addresses to MAC addresses.