Switch Interface Status Facts

You can use the interface status to understand connectivity problems and quickly see whether the link between the device and the network is operational.  Use the following commands to view the interface status:

Use...

To...

switch#show interfaces

List a large set of information about each interface.

switch#show interface status

View summary information about the interface status.

switch#show ip interfaces

View a small set of information about each IP interface.

switch#show ip interfaces brief

View a single line of information about each IP interface.

The following table summarizes some possible conditions indicated by the interface status for Ethernet interfaces:

Line status

Protocol status

Interface status

Indicates...

administratively down

down

disabled

The interface is administratively disabled with the shutdown command.

down

down

notconnect

There is a hardware or network connection problem (Physical layer), such as:

  • No cable is connected.
  • The cable is connected but is improperly wired (or broken) so that signals cannot be sent or received correctly.
  • The device on the other end of the cable is powered off or the other interface is administratively shut down.

down

down

err-disabled

Port security has disabled the switch port.

up

up

connected

The interface is working correctly and a live connection is present.

Credit: Testout 640-802 CCNA Notes