In the prior time of systems administration the Layer 2 switch was the quickest gadget for sending information very much like the information is truly gotten and forward onto different ports and the switch was relatively delayed all the while.

The organization engineer contemplates to expand the switch segment into access, circulation and center layer however much as could reasonably be expected. At the point when they stretch out the layer 2 changes to these layers they made circle issues.

To take care of this issue, the designers utilized the crossing tree convention however it is as yet empowering adaptability and overt repetitiveness in between switch associations. With the advancement of innovations, the switch turned out to be quicker and less expensive, So, directing becomes conceivable at wire speed.

Accordingly the switch has moved to center and dissemination layers without influencing the presentation of the organization. The clients are circulated into independent VLANs and subnets, and the organization engineers begin arranging the appropriation wraps as layer 3 passages for the clients of access switch VLANs.

Along these lines, every conveyance switch required its novel IP address matching to each entrance switch VLAN. The Layer 3 steered ports are utilizes between the dispersion and the center layer switch. The architects are not dependant on traversing tree convention since there are no actual circles in the layer 2 piece of the geography.

We can design switch virtual point of interaction (SVI) for both on multi-facet switch and a Layer 2 switch for a VLAN that exists on that switch. In any case, just the multi-facet (layer 3 upheld) switch can do between VLAN steering.

The Switch Virtual Interface is certainly not an actual port, accordingly, it’s known as a virtual connection point. It is working on a multi-facet switch very much like a switch interface and that can be designed similarly as a switch interface.

The SVI gives layer 3 handling to bundles to all related hosts of that VLAN. Whenever you need to design the SVI, guarantee the specific VLAN presence on the switch.

In the figure over, the switch should have VLAN 100 and VLAN 200 in the VLAN information base if not, the SVI interface stays down. The justification for that we required SVI are the accompanying.

     To offer an entryway for a VLAN.
     Giving Layer 3 IP availability to the switch
     To help steering convention and crossing over setups

The geography comprising of two VLANs required between VLAN steering utilizing a switch virtual point of interaction (SVI). The setup steps are the accompanying.

We empower steering on the switch utilizing “IP directing”. On the off chance that directing isn’t empowered on the switch we can’t speak with other VLANs. With this order, the switch construct its steering table over the IP address data on the switch virtual connection points.

We can confirm the IP directing setup utilizing the “show ip course” and “show startup-config” orders. The figure beneath outlines the switch steering table

As I said before that we can design the switch virtual connection point (SVI) interface for both Layer 3 and Layer 2 switches, however the thing that matters is the “ip steering”. On layer 2 switches, we utilize the switch virtual connection point (SVI) just for far off administration of the switch.

We can confirm the point of interaction arrangement by utilizing the “show ip interface brief” order. Very much like we utilize the order for switch interface check.

The order will show all ports and the virtual point of interaction of the switch. We can likewise utilize the “show interfaces” order to see all ports and the VLAN interface. In the event that we simply need the necessary point of interaction, we can utilize the order with interface ID, for example, “show interfaces vlan 100”, this order will just show the settings of point of interaction VLAN 100. For different orders, you can peruse my previous articles.


The switch virtual point of interaction (SVI) is quicker than switch on-a-stick in light of the fact that everything is equipment exchanged and directed.
It isn’t expected any outer connections from the change to the switch for directing.
The limit of one connection is over in this strategy since we can utilize Layer 2 Ether Channels between the changes to get more transfer speed


The main hindrance of layer 3 switches, it is an excess of expensive.