Adding a Logical Interface

For a physical interface to function, you must configure at least one logical interface on that device. . You can also configure other logical interface properties.

The logical properties of an interface are the characteristics that do not apply to the physical interface. Logical properties include:

IP address or addresses associated with the interface. A logical interface can be configured with an IPv6 address, IPv4 address, or both. The IP specification requires a unique address on every interface of each system attached to an IP network, so that traffic can be correctly routed. Individual hosts such as home computers must have a single IP address assigned. Devices must have a unique IP address for every interface.
Virtual LAN (VLAN) tagging

To create logical interface for a physical interface:

Select Resources > Devices .
The Devices page appears.
Click the device name that you want to configure.
The Device-Name page appears
Click the Configuration tab.
The Physical Interfaces, Routing Instances, and Zones tab appears.
Click Physical Interfaces tab.
The Physical Interfaces page appears.
Select a physical interface and click View/Configure.
The Logical Interfaces page appears.
Click the plus icon (+) .
The Create Logical Interface page appears.
Complete the configuration settings according to the guidelines provided inTable 1.
Click OK to save the changes.

Table 1: Fields on the Logical Interfaces Page
Field	Description
Basic Information
Unit	Enter the number of the logical interface. Range: 0 through 2,147,483,647.
Description	Enter a description for the logical interface. The maximum number of characters is 255.
VLAN ID	Enter the VLAN ID for the 802.1q VLAN tags.
IPv4 Address	Click the plus icon (+) . The Add - Address(IPv4) page appears.
IPv4 Address	Enter an IPv4 address for the logical interface.
Subnet	Enter the subnet for the IPv4 address. Range: 0 through 32
Primary	Select this check box to mark the IPv4 address as the primary address of the protocol on the logical interface. If the logical unit has more than one IP address, the primary IP address is used by default as the source address when packet transfer originates from the interface and the destination address does not indicate the subnet.
Preferred	Select this check box to specify that the IPv4 address is the preferred address for the logical interface. If you configure more than one IP address on the same subnet, the preferred source address is chosen by default as the source address when you initiate frame transfers to destinations on the subnet.
IPv6 Address	Click the plus icon (+) . The Add - Address(IPv6) page appears.
IPv6 Address	Enter an IPv6 address for the logical interface.
Subnet	Enter the subnet for the IPv6 address. Range: 0 through 32
Primary	Select this check box to specify that the IPv6 address is the primary address of the protocol on the logical interface. If the logical unit has more than one IP address, the primary IP address is used by default as the source address when packet transfer originates from the interface and the destination address does not indicate the subnet.
Preferred	Select this check box to specify that the IPv6 address is the preferred address for the logical interface. If you configure more than one IP address on the same subnet, the preferred source address is chosen by default as the source address when you initiate frame transfers to destinations on the subnet.