Can VLANs with same no but on different switches communicate with each other?



VLANs, or Virtual Local Area Networks, are a way of logically segmenting a network. VLANs can be used to separate traffic on a single switch, or multiple switches, allowing for improved security and better performance. But can VLANs with the same number, but on different switches, communicate with each other? The answer is yes.

As long as the VLANs have the same number, they can communicate with each other, regardless of the switch they are on. This is because VLANs are a layer 2 technology, and the number of the VLAN is the only identifying factor. No matter which switch the VLAN is on, all the ports in the VLAN will be able to communicate with each other.

In order for the VLANs to communicate with each other, the switches will need to be connected using a trunk link. A trunk link is a type of link that allows multiple VLANs to pass between two switches. The trunk link will need to be configured on both switches, and will need to allow the same set of VLANs to pass through.

Once the trunk link is configured, the VLANs will be able to communicate with each other, regardless of which switch they are on. This is because the frames that are sent between the switches will be tagged with the VLAN number, so the switches will know which VLAN the frames belong to. The frames will then be sent out the trunk link to the other switch, and the frames will be put into the correct VLAN on the other switch.

One thing to consider when setting up VLANs on different switches is the use of VLAN Trunking Protocol (VTP). VTP is a protocol that allows the switches to dynamically learn which VLANs are active and which ports are in each VLAN. This can save time and effort when configuring VLANs, as it removes the need to manually configure the VLANs on each switch.

In conclusion, VLANs with the same number, but on different switches, can communicate with each other. This is because VLANs are a layer 2 technology, and the number of the VLAN is the only identifying factor. In order for the VLANs to communicate, the switches will need to be connected using a trunk link, and the frames will be tagged with the VLAN number so the switches know which VLAN the frames belong to. Additionally, the use of VTP can help make the process of configuring VLANs on different switches much easier.

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