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Configuring a Layer 3 Logical Interface

Devices use Layer 3 logical interfaces to divide a physical interface into multiple logical interfaces, each corresponding to a VLAN. Layer 3 logical interfaces route traffic between subnets.

To configure Layer 3 logical interfaces, enable VLAN tagging and partition one or more physical ports into multiple logical interfaces, each corresponding to a VLAN ID.

Before you begin, make sure you set up your VLANs. See Configuring VLANs.

To configure Layer 3 logical interfaces:

  1. Enable VLAN tagging:
    [edit interfaces interface-name]
    user@switch# set vlan-tagging
  2. Bind each VLAN ID to a logical interface:
    [edit interfaces interface-name]
    user@switch# set unit logical-unit-number vlan-id vlan-id-number

Published: 2015-03-02