Hi, I was able to setup an L3 VXLAN GW only on N7K, but as per documentation: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/vxlan/configuration/guide/b_NX-OS_VXLAN_Configuration_Guide/configuring_vxlan_flood_and_learn.html seems NOT to be supported, can anyone clarify:
Any idea? should i put the VNI to VSI encap (I dont have any L2 interfaces facing underlay network!)? Should i put that and create the vlans even i dont have any port?
If the switch that runs the Layer 3 gateway functionality does not run Layer 2 gateway functionality, that is, participates in the data plane learning, it has to flood the post-routed packet to all Layer 2 gateways through the multicast tree.
If the switch runs Layer 3 gateway and Layer 2 gateway functionality, the switch can resolve the destination VTEP at the Layer 2 level, and can forward the packet to the correct VTEP by itself.
Since Layer 2 gateway and Layer 3 gateway functionalities are tightly integrated from the configuration perspective (Layer 3 gateway is achieved by configuring the BDIs for bridge-domains corresponding to the VNIs), case (1) will not be applicable in the Cisco Nexus 7000, and only case (2) is supported.
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