Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 932
VXLAN concepts
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● Z9332F-ON Configuration notes All Dell EMC PowerSwitches except MX-Series, S4200-Series, S5200 Series, and Z9332F-ON: In a static VXLAN, overlay routing is supported on: ● S4100-ON Series ● S4200-ON Series ● S5200-ON Series ● S4048T-ON ● S6010-ON VXLAN concepts Network virtualization overlay (NVO) An overlay network extends L2 connectivity between server virtual machines (VMs) in a tenant segment over an underlay L3 IP network. A tenant segment can be a group of hosts or servers that are spread across an underlay network. ● The NVO overlay network uses a separate L2 bridge domain (virtual network), which is independent of legacy VLAN forwarding. ● The NVO underlay network operates in the default VRF using the existing L3 infrastructure and routing protocols. Virtual extensible A type of network virtualization overlay that encapsulates a tenant payload into IP UDP packets for LAN (VXLAN) transport across the IP underlay network. VXLAN network A 24-bit ID number that identifies a tenant segment and transmits in a VXLAN-encapsulated packet. identifier (VNI) VXLAN tunnel A switch with connected end hosts that are assigned to virtual networks. The virtual networks map to endpoint (VTEP) VXLAN segments. Local and remote VTEPs perform encapsulation and de-capsulation of VXLAN headers for the traffic between end hosts. A VTEP is also known as a network virtualization edge (NVE) node. Bridge domain A L2 domain that receives packets from member interfaces and forwards or floods them to other member interfaces based on the destination MAC address of the packet. OS10 supports two types of bridge domains: simple VLAN and virtual network. ● Simple VLAN: A bridge domain a VLAN ID represents. Traffic on all member ports is assigned with the same VLAN ID. ● Virtual network: A bridge domain a virtual network ID (VNID) represents. A virtual network supports overlay encapsulation and maps with either a single VLAN ID in a switch-scoped VLAN or with multiple (Port,VLAN) pairs in a port-scoped VLAN. Distributed routing All VTEPs in a virtual network perform intersubnet routing and serve as L3 gateways in two possible modes: ● Asymmetric routing: All VTEPs can perform routing. Routing decisions are made only on ingress VTEPs. Egress VTEPs perform bridging. ● Symmetric routing: All VTEPs perform routing. Routing decisions are made on both ingress and egress VTEPs. Virtual network In OS10, each L2 flooding domain in the overlay network is represented as a virtual network. Virtual network A 16-bit ID number that identifies a virtual network in OS10. identifier (VNID) Virtual-network A router interface that connects a virtual network bridge to a tenant VRF routing instance. interface Access port A port on a VTEP switch that connects to an end host and is part of the overlay network. Network port A port on a VTEP switch that connects to the underlay network. Switch-scoped VLAN A VLAN that is mapped to a virtual network ID (VNID) in OS10. All member ports of the VLAN are automatically added to the virtual network. ● You can map only one VLAN ID to a virtual network. 932 VXLAN
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