Virtual Local Area Network (VLAN)
Virtual Local Area Network (VLAN) is a logical grouping of hosts. This grouping allows them to communicate if they are on the same LAN, irrespective of the physical topology of the network. VLAN offer the ability to group computers together into logical workgroups. This can simplify network administration when connecting clients to servers that are geographically distributed. Typically, VLAN consist of co-workers in the same department but in different locations or a cross functional team working on a joint endeavor.
Virtual Local Area Network (VLAN)
Virtual Local Area Network (VLAN) is a logical grouping of hosts. This grouping allows them to communicate if they are on the same LAN, irrespective of the physical topology of the network. VLAN offer the ability to group computers together into logical workgroups. This can simplify network administration when connecting clients to servers that are geographically distributed. Typically, VLAN consist of co-workers in the same department but in different locations or a cross functional team working on a joint endeavor.
VLAN Types:
There are two basic types of VLAN:
- Tagged: VLAN is based on the IEEE 802.1Q specification. Each packet has a 4-byte tag added to the packet hearer. The switch must support IEEE 802.1Q tagging and be properly configured. Please check your switch documents for the correct switch configuration.
- Un-tagged: Or Port-based VLANs are statically configured on the switch. They are transparent to connected devices.
Execution Reviews:
- Many companies software supports maximum of 64 VLANs per network port or team.
- To set up IEEE VLAN membership (Multiple VLANs), the adapter must be attached to a switch with IEEE 802.1Q VLAN capability.
- VLAN can co-exist with teams (if the adapter supports both). The team must be defined first, then you can set up your VLAN.
- You can set up only one untagged VLAN per port or team. You must have at least one tagged VLAN before you can set up an un-tagged VLAN.
- After creating the VLAN, the adapter associated with the VLAN can have a temporary loss of connectivity.
- A VLAN cannot be removed if a virtual NIC is bound to it.
- If VLAN is assigned to an adapter, the Priority and VLAN option on the Advanced properties tab is enabled and cannot be disabled until all VLAN is removed from the adapter.
- If you change the setting under the Advanced tab for one VLAN, it changes the settings for all VLANS using that port.
- Advanced Networking Services (ANS) VLANs are not supported on adapters and teams that have VMQ enabled. But, VLAN filtering with VMQ is supported via Microsoft Hyper-V VLAN interface.
- You can have different VLAN tags on a child partition and its parent. Those settings are separate from one to another, and can be different or the same. The VLAN tag on the parent and child must be the same if you want the parent and child partitions to be able to communicate through that VLAN.
For more information see Microsoft Hyper-V virtual NIC on teams and VLANs.
Advantages of VLAN:
- Improve LAN configuration updates (Adding, Editing, Moves).
- Improve network performance.
- Simplicity in your management tasks.
- Frontier for broadcast storms.
- Reduce security complications.
Before Patch Installation:
After Patch Installation:
