Can a subnet span multiple VLANs?
No, VLANs don’t require different subnets. Different subnets require different subnet addresses if they ever need to be able to route and/or talk to each other) and by extension if one VLAN wants to talk to a different VLAN it must use different addresses so we can make a routing decision to the right place.
Can one port have multiple VLANs?
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. Your specific hardware will determine what is possible.
Can we assign 2 VLANs to a single port?
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.
What type of port can be assigned to multiple VLANs at the same time?
A trunked port can handle as many VLANs you can create on the switch. Typically up to 4094 VLANs.
How do you communicate between two VLANs?
Three options are available for routing between VLANs:
- Use a router, with one router LAN interface connected to the switch for each and every VLAN.
- Use one router interface with trunking enabled.
- Use a Layer3 switch, a device that performs both the switching and routing operations.
How do you connect different VLANs to the same switch?
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 you have two VLANs in one subnet?
I think the answer to your question is no, you cannot have a single subnet assigned to two Vlans. As Richard explains below, it would work at a purely Layer 2 level but you would not be able to route between them or between them and others subnets as only one Layer 3 port could exist in that single subnet.
Can you allow multiple VLANs on port 4 / 38?
For port 4/38, yes – it will be in trunk mode. Vlans 699,712,751,787,987,3890 will be allowed on this trunk. You can verify if they are forwarding, with the show int trunk command. 05-15-2016 01:45 PM
Can a Cisco switch jump across two VLANs?
If you use untagged frames (e.g. access ports), you can jump across VLANs because the switches cannot tell the frames belong to different VLANs. (NB: on Cisco devices, though, if CDP is active, it will note, but not block, access ports that are on different VLANs.)
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.