VLAN Application Scenarios Users can be isolated at Layer 2 using VLANs and can communicate with each other at Layer 3 through VLANIF interfaces. Inter-VLAN Layer 2 Isolation In the following figure, there are multiple companies in a building. These companies share network resources to reduce co...
How to manage and configure VLANs The purpose of a virtual LAN is to provide a helpful layer of intercommunication within LANs and associated devices. Switch ports are essential components of this type of network configuration and help group multiple devices from distinct LANs. This way, communicat...
How to manage and configure VLANs The purpose of a virtual LAN is to provide a helpful layer of intercommunication within LANs and associated devices. Switch ports are essential components of this type of network configuration and help group multiple devices from distinct LANs. This way, communicat...
VLANs, VLAN aggregation associates the Layer 3 VLANIF interface with physical interfaces. This allows all sub-VLANs to share one gateway to communicate with an external network. In addition, proxy ARP can be used to implement Layer 3 connectivity between sub-VLANs. Super-VLANs and sub-VLANs...
3. Forwarding Layer 2 Frames: A switch equipped with the native VLAN can forward any Layer 2 frame received on a trunk port, regardless of whether it is tagged or untagged, to the intended VLAN. 4. Drop Unencapsulated Frames: Any unencapsulated frames arriving on a trunk port are immediate...
VLAN frame format In a traditional Ethernet data frame, the destination MAC address and source MAC address are followed by the upper-layer protocol type field. As shown in the figure, DA indicates the destination MAC address, SA indicates the source MAC address, and Type indicates the protocol...
A Virtual Local Area Network, Virtual LAN, or VLAN, can be used to segment (divide) a single broadcast domain to multiple broadcast domains in a layer 2 switched network. VLANs are not restricted to any physical boundary in the switched network if the devices are interconnected using ...
A VLAN, like the LAN it sits atop, operates at Layer 2 of the network, the Ethernet level. VLANs partition a single switched network into a set of overlaidvirtual networksthat can meet different functional and security requirements. This partitioning avoids the need to have multiple, distinct...
Among the reserved VLANs, VLANs 4064 to 4071 are used for port mirroring, and VLAN 4095 is used by the system to forward packets inside a device. Other reserved VLANs are used for function extension in later versions. In addition, Layer 3 interfaces are available on CE switches and use ...
Configure remote mirroring for VLAN broadcast through an intermediate Layer 2 device. Figure 9-24 Connecting to multiple monitoring devices through an intermediate Layer 2 device As shown in Figure 9-24, network administrators need to copy packets on ...