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11 – VLAN
Create separate network segments (collision domains) across Magnum 6K family of
switches…..
hort for virtual LAN (VLAN), a VLAN creates separate collision domains or network
segments that can span multiple Magnum 6K family of switches. A VLAN is a group of ports
designated by the switch as belonging to the same broadcast domain. The IEEE 802.1Q
specification establishes a standard method for inserting VLAN membership information into
Ethernet frames.
W
V
co
hy VLANs?
LAN’s provide the capability of having two (or more) Ethernet segments
-exist on common hardware. The reason for creating multiple segments
in Ethernet is to isolate collision domains. VLANs can isolate groups of
users, or divide up traffic for security, bandwidth management, etc. VLANs are widely
used today and are here to stay. VLANs need not be in one physical location. They can be
spread across geography or topology. VLAN membership information can be propagated
across multiple Magnum6K switches.
FIGURE 78 – VLAN as two separate collision domains. The top part of the figure shows two
“traditional” Ethernet segments.
Chapter
11
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j
Segment 1 Segment 2
VLAN 1 VLAN 2
Segment 1Segment 1 Segment 2Segment 2
VLAN 1VLAN 1 VLAN 2VLAN 2