Vlan - D-Link DES-3624 Series User Manual

Stackable NWay Ethernet Switch User's Guide
a single trunk port. A trunk connection cannot be made with
switches that perform load-balancing on a per-packet basis.

VLAN

VLANs are a collection of switch ports grouped together in a
secure, autonomous broadcast and multicast domain. VLANs
allow a network to be segmented in order to reduce the size of
broadcast domains. All Ethernet packets (unicast, broadcast,
multicast, unknown, etc.) entering a VLAN will only be
forwarded to the ports that are members of that VLAN.
Another benefit of VLANs is that you can change the network
topology without physically moving stations or changing cable
connections. Stations can be "moved" simply by changing
VLAN settings from one VLAN (the sales VLAN, for example) to
another VLAN (the marketing VLAN). This allows VLANs to
accommodate network moves, changes, and additions with the
utmost flexibility.
VLANs can also provide a level of security to your network.
Port-based VLANs allow you to configure ports to not send or
receive packets outside of the VLAN.
The untagging feature of IEEE 802.1Q VLANs allow VLANs to
work with legacy switches and NICs that don't recognize VLAN
tags in packet headers. The tagging feature allows VLANs to
span multiple 802.1Q-compliant switches through a single
physical connection and allows Spanning Tree to be enabled on
all ports and work normally.
44 Switch Management Concepts