Port Up / Down Commands

Overview

Use these commands to administratively shut down or bring up a switch port. Useful when you need to power-cycle a PoE device, isolate a port, or troubleshoot a link.

Cisco IOS / Catalyst

# Enter interface configuration
switch# configure terminal
switch(config)# interface GigabitEthernet1/0/5

# Shut down the port (disable)
switch(config-if)# shutdown

# Bring the port back up
switch(config-if)# no shutdown

# Verify port status
switch(config-if)# end
switch# show interface GigabitEthernet1/0/5 status

Shorthand: Interface names can be abbreviated — gi1/0/5 instead of GigabitEthernet1/0/5, or fa0/5 for FastEthernet.

Cisco Meraki

Meraki switches are managed via Dashboard only:

1. Go to Switch > Switches, select the switch

2. Click the Ports tab

3. Click the port number to open its settings

4. Toggle Port Enabled off/on

5. Click Update

HP / Aruba ProCurve

# Enter interface configuration
switch# configure
switch(config)# interface 5

# Disable the port
switch(eth-5)# disable

# Enable the port
switch(eth-5)# enable

# Verify status
switch(eth-5)# exit
switch# show interface 5

Tips

• Shutting down a PoE port and bringing it back up is often the fastest way to reboot a camera or access reader without physically unplugging

• Always confirm the correct port before shutting down — verify with show mac address-table interface gi1/0/5 (Cisco) to see what device is connected

• On Cisco: use show interface status to see all port states at a glance