Dell S4148U-ON EMC Networking Virtualization Overlay with BGP EVPN - Page 10
The VXLAN protocol
![]() |
View all Dell S4148U-ON manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 10 highlights
3.1 The VXLAN protocol VXLAN allows a Layer 2 network to scale across the data center by overlaying an existing Layer 3 network and is described in Internet Engineering Task Force document RFC 7348. Each overlay is referred to as a VXLAN segment. Each segment is identified through a 24-bit segment ID referred to as a VNI. This allows up to 16 Million VNIs, far more than the traditional 4,094 VLAN IDs allowed on a physical switch. VXLAN is a tunneling scheme that encapsulates Layer 2 frames in User Datagram Protocol (UDP) segments, as shown in Figure 7. VXLAN encapsulated frame VXLAN encapsulation adds approximately 50 bytes of overhead to each Ethernet frame. As a result, all switches in the underlay (physical) network must be configured to support an MTU of at least 1600 bytes on all participating interfaces. Note: In this deployment example, switch interfaces are set to their maximum supported MTU size of 9216 bytes. VTEPs handle VXLAN encapsulation and de-encapsulation. In this implementation, the leaf switches are the VTEPs. 10 Dell EMC Networking Virtualization Overlay with BGP EVPN
![](/manual_guide/products/dell-powerswitch-s3048on-emc-networking-virtualization-overlay-bgp-evpn-aa0c45e/10.png)