Cisco Catalyst 9500 Series

Establishing an IP Broadcast Address
The most popular IP broadcast address (and the default) is an address consisting of all ones (255.255.255.255).
However, the Device can be configured to generate any form of IP broadcast address.
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
Enters interface configuration mode, and
specifies the interface to configure.
interface interface-id
Example:
Device(config)# interface
gigabitethernet 1/0/1
Step 3
Enters a broadcast address different from the
default, for example 128.1.255.255.
ip broadcast-address ip-address
Example:
Device(config-if)# ip broadcast-address
128.1.255.255
Step 4
Returns to privileged EXEC mode.end
Example:
Device(config)# end
Step 5
Verifies the broadcast address on the interface
or all interfaces.
show ip interface [interface-id]
Example:
Device# show ip interface
Step 6
(Optional) Saves your entries in the
configuration file.
copy running-config startup-config
Example:
Device# copy running-config
Step 7
startup-config
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
75
Configuring IP Unicast Routing
Configuring Broadcast Packet Handling