Cisco Catalyst 9500 Series

Procedure
PurposeCommand or Action
Enables privileged EXEC mode. Enter your
password if prompted.
enable
Example:
Device> enable
Step 1
Enters the global configuration mode.configure terminal
Example:
Device# configure terminal
Step 2
Enables the use of subnet zero for interface
addresses and routing updates.
ip subnet-zero
Example:
Device(config)# ip subnet-zero
Step 3
Returns to privileged EXEC mode.end
Example:
Device(config)# end
Step 4
Verifies your entries.show running-config
Example:
Device# show running-config
Step 5
(Optional) Saves your entries in the
configuration file.
copy running-config startup-config
Example:
Device# copy running-config
Step 6
startup-config
Disabling Classless Routing
To prevent the Device from forwarding packets destined for unrecognized subnets to the best supernet route
possible, you can disable classless routing behavior.
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
62
Configuring IP Unicast Routing
Assigning IP Addresses to Network Interfaces