Transcript VLANs - Ethernet Direct

Ethernet Basics - 3
VLANS
VLANS- Making the physical logical
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VLAN- Virtual Local Area Network
VLANs allow the user to create logical groups of user and end devices that
are separate from one another, yet use the same physical infrastructure
There are 2 types:
– Private VLANs- these use some sort of proprietary mechanism to
provide the ability to segregate groups of users; an example would be
the Husky VLAN manager
– 802.1Q VLANs- these use the IEEE 802.1Q standard to implement
VLANs
There are multiple implementations for private and Standard VLANs:
– Protocol based- segregate users based on the network protocol; IP,
DecNet, IPX/SPX, etc. this allows the user to roam from port to port and
allow the policy to follow
– MAC Based- Segregate users based on their MAC address; this allows
the user to roam from port to port and allow the policy to follow
– Port Based- The VLAN ID is attached to the port; Ethernet Direct uses
port based VLANs.
VLANs- How do they work
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For this, we’ll discuss port based VLANs…
To define port based VLANS, there is a VLAN ID that is placed on the
port to define the VLAN group the port is a part of. What ever is
attached to the port is a part of that VLAN
VLANS can span multiple switches, so the link between the switches
carrying the data are referred to as trunks
A 802.1Q VLAN trunk has the ability to carry multiple VLANs across it
and is a member of every VLAN that is assigned to go across it
To send data between VLANs, you need a layer 3 device
VLANs – traffic without a VLAN
Bandwidth is consumed
by the traffic of the
devices – not very efficient
Even with managed
switches !
VLANs- traffic with a VLAN
Traffic is segregated by
the VLAN – very efficient
Thank You
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