I have installed Proxmox on the host(Dell R630) machine and can access the internet from Proxmox via MikroTik(CCR2004-1G-2XS-PCIe) ether1. I have connected a laptop to the server’s ether4 port. Both server ether3 and ether4 are bridged with MikroTik ether1. However, I cannot access the internet from the laptop. Can you suggest if this setup is possible and what might be causing the issue?
CCR2004-1G-2XS-PCIe by default comes with SFP28-1 and SFP28-2 physical ports configured as pass-through to ether-pcie1 and ether-pcie2. Card also makes two extra pcie ports to host -
ether-pcie3 and ether-pcie4. When inserted in Linux host it will make 4 network interfaces of which first two are linked to physical ports.
Please check if servers ether4 is actually different NIC and not one of those virtual ports that come from CCR2004 PCIe card. For me it looks like you have connected virtual port instead of physical port that goes to laptop.