SMC Networks SMC6709L2 Manuel d'utilisateur télécharger pdf (Page 49)

VLAN C

ONFIGURATION

3-27

VLAN Configuration

Overview

In large networks, routers are used to isolate broadcast traffic for each

subnet into separate domains. This switch provides a similar service at

Layer 2 by using VLANs to organize any group of network nodes into

separate broadcast domains. VLANs confine broadcast traffic to the

originating group, and can eliminate broadcast storms in large networks.

This also provides a more secure and cleaner network environment.

VLANs provide greater network efficiency by reducing broadcast traffic,

and allow you to make network changes without having to update IP

addresses or IP subnets. VLANs provide a high level of network security

since traffic must pass through a Layer 3 switch to reach a different VLAN.

This switch supports the following VLAN features:

• Port-based VLANs for isolating user groups or subnets

• Protocol-based VLANs for isolating specific protocol subnets

• IEEE 802.1Q tagged VLANs that can span across the network

(Up to 255 VLANs based on the IEEE 802.1Q standard)

• Distributed VLAN learning across multiple switches using tagging and

GVRP dynamic registration protocol

• Port overlapping, allowing a port to participate in multiple VLANs

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SMC Networks SMC6709L2 Manuel d'utilisateur Page 49