I have an OPNsense router's LAN (192.168.0.1) connected to 10gbe port on my switch and a couple of devices (A, B) connected to the same switch via 25gbe ports. OPNsense acts as a DHCP server. Does anyone know when devices A (192.168.0.2) and B (192.168.0.3) transfer files between each other are they limited by the 10gbe OPNsense router to switch connection or they can use full bandwidth of 25gbe switching capacity?
They will use the full bandwidth. A router is not involved in communication of devices in the same broadcast domain.
Thank you so much for your reply. That is great news for me, however what if there are some firewall rules for LAN or some DNS server installed as a plugin in OPNsense? Shouldn't all traffic go through OPNsense 192.168.0.1 interface?
Devices that share a network, e.g. a PC with 192.168.0.2 and a PC with 192.168.0.3 communicate directly with each other. No firewall rules, no filtering. Only traffic that goes through a firewall, e.g. from your LAN to the Internet or vice versa, can be filtered.
There are of course filtering switches if that is necessary.