Cisco Catalyst 9500 series Configuration Manual page 96

Configuring Summary Addresses and Split Horizon
If split horizon is enabled, neither autosummary nor interface IP summary addresses are advertised.
Note
Procedure
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
86
Command or Action
enable
Example:
Device> enable
configure terminal
Example:
Device# configure terminal
interface interface-id
Example:
Device(config)# interface gigabitethernet
1/0/1
ip address ip-address subnet-mask
Example:
Device(config-if)# ip address 10.1.1.10
255.255.255.0
ip summary-address rip ip address ip-network
mask
Example:
Device(config-if)# ip summary-address rip
ip address 10.1.1.30 255.255.255.0
no ip split horizon
Example:
Device(config-if)# no ip split horizon
end
Example:
Device(config)# end
Configuring IP Unicast Routing
Purpose
Enables privileged EXEC mode. Enter your
password if prompted.
Enters the global configuration mode.
Enters interface configuration mode, and
specifies the Layer 3 interface to configure.
Configures the IP address and IP subnet.
Configures the IP address to be
summarized and the IP network mask.
Disables split horizon on the interface.
Returns to privileged EXEC mode.