Port Vlans allowed on trunk . I am very sorry to ask you this simple question. Here’s the output for the port-security status for int fa0/2. I know there is a way while on a switch to have a computer plugged into it, unplug the network cable then i can see which port changed its status from up … S1# show interfaces fastethernet0/1 FastEthernet0/1 is up, line protocol is up Hardware is Fast Ethernet, address is 0022.91c4.0e01 (bia 0022.91c4.0e01)MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,