When a Layer 3 gateway router is reachable across the VXLAN cloud, traffic needs to traverse the VXLAN cloud encapsulated, and the gateway at the edge of VXLAN network decapsulates traffic and would then have to route the traffic. Continuing the example from the previous subsection, the Layer 3 router for the “Red” subnet is VTEP A. Traffic in the H3 to H2 direction is VXLAN-encapsulated and Layer 2 forwarded to VTEP A. VTEP A decapsulates the traffic, performs a route lookup, and then routes traffic onto VLAN “Green” (see Routing from a Tunnel).
Routing traffic from tunnels is supported on ExtremeSwitching and Summit X590, X690, series switches.
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