Configuring Vlans - 3Com 2924-SFP User Manual

8
VLAN Overview
C
ONFIGURING
This section contains the following topics:
VLAN Overview
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Viewing VLAN Details
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Viewing VLAN Port Details
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Creating VLANs
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Modifying VLAN Settings
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Modifying Port VLAN Settings
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Removing VLANs
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VLANs are logical subgroups with a Local Area Network (LAN) which
combine user stations and network devices into a single unit, regardless
of the physical LAN segment to which they are attached. VLANs allow
network traffic to flow more efficiently within subgroups. VLANs use
software to reduce the amount of time it takes for network changes,
additions, and moves to be implemented. VLANs restrict traffic within the
VLAN.
VLAN1 is the management VLAN. You can only manage the switch
through a port that is an untagged member of VLAN1.
VLANs have no minimum number of ports, and can be created per unit,
per device, or through any other logical connection combination, since
they are software-based and not defined by physical attributes.
VLANs function at Layer 2. Since VLANs isolate traffic within the VLAN, a
Layer 3 router working at a protocol level is required to allow traffic flow
between VLANs. Layer 3 routers identify segments and coordinate with
VLANs. VLANs are Broadcast and Multicast domains. Broadcast and
Multicast traffic is transmitted only in the VLAN in which the traffic is
generated.
VLAN
S