Can one interface have multiple VLANs?

The fundamental rule is that legacy/untagged VLANs require a separate link for each VLAN, while 802.1Q, or tagged VLANs can combine several VLANs in one link. Thus on the 802.1Q-compliant device, separate ports (configured as untagged) must be used to connect separate VLANs to non-802.1Q devices.

Can you have 2 VLANs on the same subnet?

Of course you can do that, but it is not the recommended way. VLANs use software to emulate separate physical LANs. Each VLAN is thus a separate broadcast domain and a separate network. As you have identified, routing between these VLANs would be difficult, because they are the same subnet.

Can a port have 2 VLANs?

If you want TWO VLANs to be accessible on that port, you can configure it as a trunk and assign both VLANs to the port and the downstream device will need to be able to make use of VLAN tagging. Additionally, you can set the “native” VLAN on the port so that it will also still accept untagged traffic.

Can 2 VLAN communicate?

Two separate VLANs must communicate through a layer-3 device, like a router. Devices on a VLAN communicate with each other using layer-2. Layer-3 must be used to communicate between separate layer-2 domains.

Can you tag multiple VLANs to a single port?

It is possible. You can have three vlans on one port if the switch configuration allows it. Mine allows one for data and one for VoIP. The quick answer is yes, That’s called a trunk.

How do I connect two VLANs?

The simplest way to enable routing between the two VLANs to simply connect an additional port from each VLAN into a Router. The Router doesn’t know that it has two connections to the same switch — nor does it need to. The Router operates like normal when routing packets between two networks.

Can a router have VLANs?

You will need to choose which devices to use to implement your VLAN and the VLAN mode to use. VLANs are supported on routers (not all) and on network switches. On routers the VLANS have different IP subnets.

Are VLANs subnets?

At a high level, subnets and VLANs are analogous in that they both deal with segmenting or partitioning a portion of the network. However, VLANs are data link layer (OSI layer 2) constructs, while subnets are network layer (OSI layer 3) IP constructs, and they address (no pun intended) different issues on a network.

How do I add multiple VLANs to a trunk port?

perform these steps:

  1. To restrict the traffic that a trunk carries, issue the switchport trunk vlan-list interface configuration command.
  2. To add a VLAN to the trunk, issue the switchport trunk allowed vlan add vlan-list command.
  3. This example shows how to remove VLANs 5 through 10 and 12.

How many VLANs can a trunk support?

If you want to use a port as a trunk though, all VLANs which can be handled by the switch can be “assigned” (You don’t need to assign VLANs to a trunk because per default, it will handle every VLAN). This number of VLANs can go from 0-4095 but 0 and 4095 are reserved – so they should not be used. So 1-4094.

Can VLAN see each other?

VLANs work the same way as two ordinary separate networks: they do not “see” each other by default, and can only communicate through a router (which has both VLANs configured, probably as “tagged” interfaces).

Can we assign multiple VLANs to same physical switch port access port?

We are having L2 Vlans on our switch and there is a requirement of assigning multiple VLANs to same physical switch port-Access port. We will be terminating server over this port having multiple applications.

Can you create VLANs with the same VLAN ID?

“Creating VLAN subinterfaces with the same VLAN ID does not create any internal connection between them. For example a VLAN ID of 300 on port1 and VLAN ID of 300 on port2 are allowed, but they are not connected. Their relationship is the same as between any two FortiGate network interfaces.

Is it possible to connect a desktop PC to both VLANs?

VLAN11: Manufacturing 192.168.1.x 255.255.255.0 VLAN12: Management 192.168.2.x 255.255.255.0 Is it in any way possible to have the desktop pc connected to the switch and have it communicate with both VLANs? I thought it wasn’t possible but I may be wrong because I am not that experienced yet. Solved! Go to Solution. 08-07-2012 02:02 AM

Can a trunk have more than one VLAN?

If you need to have more than one vlan on this port, then this will become a trunk where you have multiple vlans and the traffic will be distinguished by adding the vlan tag to it.

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