Overlay Routing

Tenants may have multiple overlays across a data center network where different VLANs belonging to the same tenant are mapped to different VXLAN Network Identifiers (VNIs). Tenants require routing between the VLANs, and VXLAN gateway nodes would need to act as Layer 3 gateways that are capable of routing traffic between tenant VLANs. Inter-overlay routing involves routing:A VXLAN tunnel endpoint (VTEP) is designated as the gateway for an overlay by manually configuring it or by running a first hop redundancy protocol (FHRP), such as VRRP on the tenant VLAN on the gateways and letting the protocol determine the placement of the router. ARP is not learned by VXLAN tunnels when the destination MAC address is the VRRP MAC address.
Note

Note

Routing between a normal VLAN and a VXLAN tenant VLAN is only supported on the ExtremeSwitching X695 switch.
Note

Note

When MLAG and VRRP is configured on the tenant VLAN, VRRP should be active-active mode between the MLAG peers.