Here is a nube question:
refer to a scheme:
Router Eth0 <---------> Fa0/1 Switch
I enter "shutdown" command on Fa0/1 interface of a switch,after that i see from Router:
router#sh int ethernet 0
Ethernet0 is up, line protocol is down
The manual only says that the "shutdown" command switches off all functions on interface.
What is the physical basis of the processing of this command ?
As I see, it only switches off Layer2 protocol (802.3). Doesn't it turns off the TX/RX circuits on interface controller?