Configuring Logical Interfaces Logical Interfaces Configurations
Configuration Guide
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2.2.2 Configuring IPv4 Parameters of the Interface
Follow these steps to configure the IPv4 parameters of the interface.
Step 1 configure
Enter global configuration mode.
Step 2 interface {
interface-type
} {
interface-number
}
Enter layer 3 interface configuration mode.
interface-type
: Type of the layer 3 interface, including fastEthernet, gigabitEthernet,
ten-gigabitEthernet, loopback and VLAN.
interface-number:
Number of the interface.
Step 3 Automatically assign an IP Address for the interface via DHCP or BOOTP:
ip address-alloc { dhcp | bootp }
Specify the IP Address assignment mode of the interface.
dhcp: Specify the Layer 3 interface to obtain an IPv4 address from the DHCP Server.
bootp: Specify the Layer 3 interface to obtain an IPv4 address from the BOOTP Server.
Manually assign an IP Address for the interface:
ip address {
ip-addr
} {
mask
} [ secondary ]
Configure the IP address and subnet mask for the specified interface manually.
ip-addr
: Specify thse IP address of the Layer 3 interface.
mask
: Specify the subnet mask of the Layer 3 interface.
secondary: Specify the interface’s secondary IP address which allows you to have two
logical subnets using one physical subnet. If this parameter is omitted here, the configured
IP address is the interface’s primary address.
Step 4 show ip interface brief
Verify the summary information of the Layer 3 interfaces.
Step 5 end
Return to privileged EXEC mode.
Step 6 copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to configure the IPv4 parameters of a routed port,
including setting a static IP address for the port and enabling the Layer 3 capabilities:
Switch#configure
Switch(config)#interface gigabitEthernet 1/0/1
Switch(config-if)#no switchport
Switch(config-if)#ip address 192.168.0.100 255.255.255.0
Switch(config-if)#show ip interface brief
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