LAN Interface static ip

I’ve removed ether5 from lan bridge, and assigned 192.168.88.5 ip to it
But I can’t connect to this ip from my pc, and in there is an “ether5 unreachable” message in the routes list gateway col.
Where I’m wrong ?

What IP has your computer?
No DHCP on that interface means no traffic if your computer is not manually configured.

My pc has been also configured with static ip from the same network (say 192.168.88.7), but they didn’t see each other.
The problem disapeared when I switched them to another net (not the default one 192.168.88.0)

You can’t have[*] router member of two IP subnets that have same network address … e.g. you can’t have 192.168.88.1/24 on bridge and 192.168.88.1/24 on ether5 … router doesn’t know which of the two subnets have to be used to access another device member of one of these two subnets. This is networking basics.

[*] It is possible to actually make it happen, but the setup is pretty awkward and not for the faint of heart. So just don’t try to do it.