Information About Configuring VLAN
A Virtual Local Area Network (VLAN) is a switched network that is logically segmented by function, project team, or application, without regard to the physical locations of users. VLANs have the same attributes as physical LANs. In VLANs, you can group end stations even if they are not physically located on the same LAN segment. Using a VLAN, you can logically segment a physical LAN into different broadcast domains. The broadcast and unicast traffic within a VLAN is not forwarded to other VLANs.
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Compared to traditional Ethernet, VLANs enjoy the following advantages:
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A traditional Ethernet network sends mass broadcast data to all the network devices directly, regardless of necessity, leading to network jitter. With VLAN, you can configure the necessary communication device in each VLAN to reduce broadcast traffic and improve network efficiency.
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Only devices that are a part of the same VLAN can communicate with each other, which helps improve the security of a network.
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A VLAN helps reduce network configuration workload. When the physical position of a host changes within the range of a VLAN, there is no need to change its network configuration.
Management VLAN
A management VLAN manages a device from a remote location, and uses protocols such as Telnet, SSH, SNMP, and syslog. A management VLAN should be configured on a Layer 2 switch. You can log in to a device from a remote location only by using a management VLAN. A management VLAN need not be configured on a Layer 3 switch. On a Layer 3 switch, the interface VLAN is the management VLAN.