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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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What Are the Functions of VLAN and VLANIF Interfaces?

What Are the Functions of VLAN and VLANIF Interfaces?

Functions of VLAN assignment are as follows:
  • Limits broadcast domains. Broadcast domains are limited to conserve bandwidth and improve network efficiency.
  • Enhances LAN security. Packets from different VLANs are transmitted separately. Hosts in a VLAN cannot communicate directly with hosts in another VLAN.
  • Improves network robustness. A fault in a VLAN does not affect hosts in other VLANs.
  • Allows flexible construction of virtual groups. With VLAN technology, hosts in different geographical locations can be grouped together, simplifying network construction and maintenance.

Functions of configuring VLANIF interfaces are as follows: A VLANIF interface is a VLAN-based Layer 3 logical interface and can be configured with an IP address. After VLANs are assigned, users in the same VLAN can communicate with each other while users in different VLANs cannot. To implement communication between VLANs, you can configure a logical Layer 3 interface (VLANIF interface).

Updated: 2020-01-07

Document ID: EDOC1000060766

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