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Port-Based Virtual LANs (VLANs) and GVRP
Port-Based Virtual LANs (Static VLANs)
Port-Based Virtual LANs (Static VLANs)
VLAN Features
Feature Default Menu CLI Web
view existing VLANs n/a page 11-10 page 11-16 page 11-21
thru 11-15
configuring static
VLANs
default VLAN with
VID = 1
page 11-10
thru 11-15
page 11-15 page 11-21
configuring dynamic
VLANs
disabled See “GVRP” on page 11-34.
A VLAN is a group of ports designated by the switch as belonging to the same
broadcast domain. (That is, all ports carrying traffic for a particular subnet
address would normally belong to the same VLAN.)
Not e This section describes static VLANs, which are VLANs you manually configure
with a name, VLAN ID (VID), and port assignments. (For information on
dynamic VLANs, see
“GVRP” on page 11-34.)
Using a VLAN, you can group users by logical function instead of physical
location. This helps to control bandwidth usage by allowing you to group high-
bandwidth users on low-traffic segments and to organize users from different
LAN segments according to their need for common resources.
By default, the Series 5300XL switch is 802.1Q VLAN enabled and allow up to
256 port-based VLANs (default: 8). For information on GVRP, see “GVRP” on
page 11-34. (The 802.1Q compatibility enables you to assign each switch port
to multiple VLANs, if needed, and the port-based nature of the configuration
allows interoperation with older switches that require a separate port for each
VLAN.)
General Use and Operation. Port-based VLANs are typically used to
enable broadcast traffic reduction and to increase security. A group of net-
work users assigned to a VLAN form a broadcast domain that is separate from
other VLANs that may be configured on a switch. On a given switch, packets
are forwarded only between ports that are designated for the same VLAN.
Thus, all ports carrying traffic for a particular subnet address should be
configured to the same VLAN. Cross-domain broadcast traffic in the switch is
11-3