SNR S2989G-48TX-RPS [163/553] Layer 3 interface configuration task list

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S2989G-24TX Operation Manual

Chapter 3 IP services Configuration

3-1

Chapter 3 IP services Configuration

3.1

Layer 3 Interface

3.1.1

Introduction to Layer 3 Interface

Layer 3 interface can be created on switch. The Layer 3 interface is not a physical

interface but a virtual interface. Layer 3 interface is built on VLANs. The Layer 3 interface

can contain one or more layer 2 ports which belong to the same VLAN, or contain no layer

2 ports. At least one of the Layer 2 ports contained in Layer 3 interface should be in UP

state for Layer 3 interface in UP state, otherwise, Layer 3 interface will be in DOWN state.

All layer 3 interfaces in the switch use the same MAC address by default, this address is

selected from the reserved MAC address while creating Layer 3 interface. The Layer 3

interface is the base for layer 3 protocols. The switch can use the IP addresses set in the

layer 3 interfaces to communicate with the other devices via IP. The switch can forward IP

packets between different Layer 3 interfaces. Loopback interface belongs to Layer 3

interface.

3.1.2

Layer 3 Interface Configuration Task List

Layer 3 Interface Configuration Task List:

1. Create Layer 3 interface

2. Bandwidth for Layer 3 Interface configuration

3. Configure VLAN interface description

4. Open or close the VLAN interface

5. VRF configuration

(1) Create VRF instance and enter VPN view

(2) Configure RD of VRF instance (optional)

(3) Configure RT of VRF instance (optional)

(4) Configure the relation between VRF instance and the interface

1. Create Layer 3 Interface

Command

Explanation

Global Mode

interface vlan <vlan-id>

no interface vlan <vlan-id>

Creates a VLAN interface (VLAN interface is a Layer 3

interface); the no command deletes the VLAN interface