30.2.7 Overview of standalone operation (example using the Layer 3 redundancy switching functionality)

When the Ring Protocol and GSRP are run separately on different VLANs, the Layer 3 redundancy switching functionality is used to connect to the ring network. The figure below shows an example of this. Layer 3 forwarding is performed from the downstream network (such as a computer) over Switch A, so that communication is performed with the upstream network through the ring network for VLAN 100. When a fault occurs on Switch A, Layer 3 forwarding is performed by Switch B (when direct link failure detection functionality is set) for the downstream network and upstream network, and communication is performed through the ring network for VLAN 200.

Figure 30-12: Layer 3 redundancy switching facility (during normal operation)

Figure 30-13: Layer 3 redundancy switching functionality (when a failure occurs)