Configuration Example For Summary Addresses And Split Horizon - Cisco Catalyst 9500 series Configuration Manual

Configuration Example for Summary Addresses and Split Horizon

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Configuration Example for Summary Addresses and Split Horizon
In this example, the major net is 10.0.0.0. The summary address 10.2.0.0 overrides the autosummary address
of 10.0.0.0 so that 10.2.0.0 is advertised out interface Gigabit Ethernet port 2, and 10.0.0.0 is not advertised.
In the example, if the interface is still in Layer 2 mode (the default), you must enter a no switchport interface
configuration command before entering the ip address interface configuration command.
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
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Command or Action
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
no ip split-horizon
Example:
Device(config-if)# no ip split-horizon
end
Example:
Device(config)# end
show ip interface interface-id
Example:
Device# show ip interface gigabitethernet
1/0/1
copy running-config startup-config
Example:
Device# copy running-config startup-config
Configuring IP Unicast Routing
Purpose
Enters interface configuration mode, and
specifies the interface to configure.
Configures the IP address and IP subnet.
Disables split horizon on the interface.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the
configuration file.