Cisco Nexus 9000 Series - Verifying the Switchport Blocking Configuration; Configuration Example for Switchport Blocking

PurposeCommand or Action
switch# interface ethernet 1/1
switch(config-if)#
Prevents the flooding of unknown multicast or unicast
packets on the specified interface.
[no] switchport block {multicast | unicast}
Example:
Step 3
Use the no form of this command to resume normal
forwarding on the port.
switch(config-if)# switchport block unicast
Displays the switchport blocking configuration.
(Optional) show interface [ethernet slot/port |
port-channel number] switchport
Step 4
Example:
switch(config-if)# show interface ethernet 1/1
switchport
Copies the running configuration to the startup
configuration.
(Optional) copy running-config startup-config
Example:
Step 5
switch(config-if)# copy running-config
startup-config
Verifying the Switchport Blocking Configuration
To display switchport blocking configuration information, perform one of the following tasks:
PurposeCommand
Displays the switchport blocking
configuration for all interfaces.
show interface switchport
Displays the switchport blocking
configuration for the specified
interface.
show interface {ethernet slot/port | port-channel number} switchport
Displays the switchport blocking
configuration in the running
configuration.
show running-config interface [ethernet slot/port | port-channel
number]
Configuration Example for Switchport Blocking
The following example shows how to block multicast and unicast flooding on Ethernet interface 1/2 and how
to verify the configuration:
switch# configure terminal
switch(config)# interface ethernet 1/2
switch(config-if)# switchport block multicast
switch(config-if)# switchport block unicast
switch(config-if)# show running-config interface ethernet 1/2
!Command: show running-config interface Ethernet1/2
!Time: Wed Apr 15 16:25:48 2015
Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.x
451
Configuring Switchport Blocking
Verifying the Switchport Blocking Configuration