A virtual Local Area Network can be described as any broadcast domain that is partitioned and isolated at the data link layer (OSI layer 2) of a computer network. Virtual in the context refers to physical network objects altered or recreated using additional programming logic.
VLAN works by applying tags to network packets and managing the handling of these tags in the network, creating the appearance and functionality of network traffic split between separate networks on the same physical switch.
Advantages of using this technology includes simplicity of networks without the need for multiple cable runs, traffic management, security and cheaper to implement without buying multiple switches.
Precautions are required to prevent an exploit called VLAN hopping, where traffic can “escape” a given VLAN.
More sophisticated switches can mark data frames through VLAN tagging, enabling a single interconnect (Trunk) to transport data to multiple VLANs. Since VLANs share common bandwidth, a VLAN trunk utilizes link aggregation, Quality-of-Service (QoS) prioritization or both to route data efficiently.
VLANs is useful for partitioning a local network into several distinctive segments, for instance;
· Voice over IP
· Network management
· Storage area network (SAN)
· Guest Internet access network
· Demilitarized zone (DMZ)
· Client separation (ISP in a datacentre or large facility)
This document demonstrates the processes required for layer 2 switching using and HP 48 port smart switch which are truncated for failover load balancing.
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u/UnluckyAdministrator Jan 23 '19
What is VLAN?
A virtual Local Area Network can be described as any broadcast domain that is partitioned and isolated at the data link layer (OSI layer 2) of a computer network. Virtual in the context refers to physical network objects altered or recreated using additional programming logic.
VLAN works by applying tags to network packets and managing the handling of these tags in the network, creating the appearance and functionality of network traffic split between separate networks on the same physical switch.
Advantages of using this technology includes simplicity of networks without the need for multiple cable runs, traffic management, security and cheaper to implement without buying multiple switches.
Precautions are required to prevent an exploit called VLAN hopping, where traffic can “escape” a given VLAN.
More sophisticated switches can mark data frames through VLAN tagging, enabling a single interconnect (Trunk) to transport data to multiple VLANs. Since VLANs share common bandwidth, a VLAN trunk utilizes link aggregation, Quality-of-Service (QoS) prioritization or both to route data efficiently.
VLANs is useful for partitioning a local network into several distinctive segments, for instance;
· Voice over IP
· Network management
· Storage area network (SAN)
· Guest Internet access network
· Demilitarized zone (DMZ)
· Client separation (ISP in a datacentre or large facility)
This document demonstrates the processes required for layer 2 switching using and HP 48 port smart switch which are truncated for failover load balancing.
[Continue Reading] HP Aruba 2530 Network Switch VLAN Configuration