Question: Can You Have Multiple VLANs On The Same Subnet?

Can a Layer 2 switch route VLANs?

Layer 2 switches can only route packets between different subnets or VLANs if the two MAC addresses are both PHYSICALLY connected to the layer 2 switch and..

How many VLANs can I have?

In a cisco network device be it switch or router, it is possible to create 4096 VLANs. In normal mode, only VLAN ID 2 to 1001 can be created. Normally the untagged default VLAN ID is 1 but any VLAN can be untagged with the command “switchport trunk native vlan 2” in that command, native VLAN is 2 (which is untagged) .

Can a VLAN span multiple subnets?

But it’s technically valid. Takeaway: Your switches won’t warn you if you have multiple subnets using a single VLAN. Never assume a VLAN has only one subnet. When in doubt, do a show run interface Vlan300 on your layer-3 switches to view both the primary and secondary IPs.

Can 2 different subnets talk to each other?

Devices in different subnets can communicate. That is the purpose of a router. Routers route packets between different networks. Even if devices in different networks are on the same layer-2 broadcast domain, you need a router to let the devices communicate at layer-3.

CAN devices on different VLANs communicate?

2 Answers. 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 2 VLANs have the same IP range?

The OSA-Express Layer 2 implementation allows the hosts to manage IP addresses and ARP cache, so it is possible to have a single guest LAN segment (or VSWITCH segment) where two different hosts use the same IP Address on different VLAN groups. …

How many VLANs is too many?

If you use VXLAN, 16 million and 1 vlans is too many vlans. Even if you put all 200 devices on the same broadcast domain modern hardware would handle the broadcast traffic easily. Unless you’re doing ALCs on your core switch and restricting things down VLANs will not stop infections from spreading.

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 can I access two different 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.

What is difference between trunk and access port?

Understanding Access and Trunk Interfaces An access port can have only one VLAN configured on the interface; it can carry traffic for only one VLAN. A trunk port can have two or more VLANs configured on the interface; it can carry traffic for several VLANs simultaneously.

How many VLANs we can create?

Under IEEE 802.1Q, the maximum number of VLANs on a given Ethernet network is 4,094 (4,096 values provided by the 12-bit VID field minus reserved values at each end of the range, 0 and 4,095).

Do VLANs slow networks?

Each network has its own broadcast domain. … As the amount of traffic grows, these broadcast packets can congest the network and could potentially slow things down. Splitting the traffic into two networks created by VLANs can greatly reduce the broadcast traffic and reduce congestion on the network.