Key Concepts 505

VLAN, two VLAN-based IP interfaces are created on a Layer 3 switch: 192.168.50.1/255.255.255.0 for VLAN ID 2 and 192.168.51.1/255.255.255.0 for VLAN ID 3.

Figure 261 below shows another example. The Switches are connected by 802.1Q tagged links. Using the 802.1Q tagged links, the Layer 3 switch, Switch D, can tell Switches A, B and C which VLAN the packets are destined for. All switches at the end of the links receive traffic for all VLANs. Traffic on each VLAN is switched at Layer 2 via Switch D, and routed at Layer 3 to other VLANs via Switch D. For example, traffic from VLAN 1 on Switch A is switched to VLAN 1 on Switch B via Switch D. Traffic from VLAN 1 on Switch C to VLAN 2 on Switch C is routed at Layer 3 through Switch D.

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HP Network Direr Software Products manual Key Concepts