Understanding Interface Logical Properties

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

• Protocol families running on the interface (including any protocol-specific MTUs)
• 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
• Any firewall filters or routing policies that are operating on the interface

Related Topics

• Junos OS Feature Support Reference for SRX Series and J Series Devices
• Understanding Interfaces
• Understanding Protocol Families
• Understanding IPv4 Addressing
• Understanding IPv6 Addressing
• Understanding Virtual LANs
• Configuring the Interface Address in the Junos Network Interfaces Configuration Guide