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AR500, AR510, and AR530 V200R007 CLI-based Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring transparent bridge, MAC table, link aggregation, VLANs, STP/RSTP/MSTP, and so on.The document provides the configuration procedures and configuration examples to illustrate the service configuration methods and application scenario.
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Using VLANIF Interfaces to Implement Inter-VLAN Layer 3 Connectivity

Using VLANIF Interfaces to Implement Inter-VLAN Layer 3 Connectivity

VLANIF interfaces are used to implement inter-VLAN Layer 3 connectivity when devices are connected to the same router or different routers.

Inter-VLAN Layer 3 Connectivity Between Devices Connected to the Same Device

As shown in Figure 3-15, departments 1 and 2 of a small-scale company belong to VLAN 2 and VLAN 3, respectively, and connect to Router through Layer 2 switches. Packets exchanged between the two departments need to pass Router.

Figure 3-15  Using VLANIF interfaces to implement inter-VLAN communication through the same device

Assign VLANs on Switch_1 and Switch_2, configure Switch_1 and Switch_2 to transparently transmit VLAN packets to Router, and configure a VLANIF interface for each VLAN on Router to allow communication between VLAN 2 and VLAN 3.

Inter-VLAN Layer 3 Connectivity Between Devices Connected to Different Layer 3 Routers

As shown in Figure 3-16, departments 1 and 2 of a medium- or large-scale company are connected across two or more routers, and belong to VLAN 2 and VLAN 3 respectively. Packets exchanged between the two departments need to pass the routers.

Figure 3-16  Using VLANIF interfaces to implement inter-VLAN communication through multiple Layer 3 routers

Assign VLANs on the switches, and configure the switches to transparently transmit VLAN packets to Router_1 and Router_2. Configure a VLANIF interface for each user VLAN and interconnected VLANs on switches, and configure VLANIF interfaces for interconnected VLANs on other Layer 3 devices. In addition, configure static routes or a dynamic routing protocol between Router_1 and Router_2 (a dynamic routing protocol is recommended when devices are connected across more than two routers).

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Updated: 2019-05-25

Document ID: EDOC1000097279

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