SMC Networks 6709L2, Руководство по управлению

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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