Types Of Vlans Operate On The First Layer Of The Osi Model

1171 Words Oct 6th, 2014 5 Pages
2.1 Port Based VLANs:
These types of VLANs operate on the first layer of the OSI model. Here the ports of a switch are divided and assigned to a particular VLAN. If any workstation or host is connected to the ports it is automatically redirected to that particular VLAN which was assigned earlier.
The main disadvantage of the VLAN is that of reconfiguration of port if a host or user keeps shifting from one place to another. Fig 1. VLAN Based on Switch Port Number
Membership in VLAN can be defined based on ports that belong to VLAN. For example, in a bridge with four ports, ports 1,2,4 belong to VLAN 1 and port 3 belongs to VLAN 2.”
Port VLAN
1 1
2 1
3 2
4 1
Table No. 1 2.2 MAC Address Based VLANs:
These types of VLANs operate on the second layer of the OSI model. This type of model is based on the MAC Address of the host in the network. This type of model is very useful in those where the host shifts from one place to another on a constant basis, as the MAC address is inseparable from its host or workstation. Whenever the Mac address appears across the port it routes it to the assigned VLAN.
The main disadvantage associated with the MAC Address based is that all the memberships have to be assigned initially and this could prove to be a tiring work with a network containing a large number of users.
“Membership in a VLAN is based on the MAC address of the workstation. The switch tracks the MAC addresses which belong to each VLAN. Since MAC addresses form a part…

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