Administrator Guide

• Install VTEP tunnels
• Distribute the VTEPs to MAC binding to all relevant VTEPs.
• Provide an interface for cloud orchestration in cloud data center management.
In VXLAN with NSX, Dell Networking OS supports physical interface or Port channel as access port. Dell supports
only physical interface as network port and does not support Port channel/VLAN as network port.
NOTE: Dell Networking OS supports only NSX as the controller for VXLAN and does not support Nuage
controllers.
VTEP (VXLAN
Tunnel End Point)
VTEPs work as the open vSwitch running on the hypervisor on a virtualized server or as the VXLAN Gateway or as
the Service Node (SN) that is responsible for ooding. The VTEPs are responsible for encapsulation and
decapsulation of VXLAN headers.
VXLAN Gateways VXLAN Gateways act as the VTEPs that encapsulate and decapsulate VXLAN headers. The roles and
responsibilities of the Gateway are:
• Connects to the NVP client based on user conguration.
• Advertises south-facing VXLAN capable ports to the NVP client.
• Creates logical networks based on messages from the NVP.
• Creates tunnels to VTEPs based on messages from the NVP.
• Binds the Port and VLAN to logical networks based on messages from the NVP.
• Binds MACs to the VTEP and logical network based on messages from the NVP.
• Advertises MACs learnt on south-facing VXLAN capable-ports to the NVP client.
VXLAN Hypervisor It is the VTEP that connects the Virtual Machines (VM) to the underlay legacy network to the physical
infrastructure.
Service Node(SN) It is also another VTEP, but it is fully managed by NSX. The purpose of SN is to be the central replication engine for
ooded packets
Legacy TOR It is a TOR switch, which performs routing or switching decisions.
Functional Overview of VXLAN Gateway
The following section is the functional overview of VXLAN Gateway:
1 Provides connectivity between a Virtual server infrastructure and a Physical server infrastructure.
2 Provides the functions performed by a VTEP in a virtual server infrastructure. The functions of a VTEP are:
• VTEP is responsible for creating one or more logical networks.
• VTEP is responsible for identifying and binding a Port and VLAN to a logical network
• VTEP maintains MAC bindings to a VTEP.
• VTEP is typically managed by a network orchestrator. When the device functions as VTEP, VXLAN from VMWare is the network
orchestrator.
• VXLAN communicates with the VTEP using a standard protocol called OvsDb Protocol. The protocol uses the JSON RPC-based
message format.
• The VTEP acts according to the TOR schema dened by VMWare. The solution is very specic to VMWare-based orchestration
platforms and does not work with other orchestration platforms.
VXLAN Frame Format
VXLAN provides a mechanism to extend an L2 network over an L3 network. In short, VXLAN is an L2 overlay scheme over an L3 network
and this overlay is termed as a VXLAN segment. VMs within the same VXLAN segment communicate with each other through a 24–bit ID
Virtual Extensible LAN (VXLAN)
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