I have 3 questions about my 3550 switch:
i)I saw interface VLAN 1 is showing interface up but line protocol down, tried many ways including reset shut and unshut interface, but working
ii)After creating another vlan, also showing up and down.
iii)I connected router and switch via strait cable, the port light shows green but from the information when I issued "show ip interface brief"
I saw the port is down&down.
Anybody got the same problem defore?