Components Of Vxlan Frame Format - Dell S6000–ON Configuration Manual

Figure 131. VXLAN Frame Format

Components of VXLAN Frame Format

Some of the important fields of the VXLAN frame format are described below:
Outer Ethernet The Outer Ethernet Header consists of the following components:
Header:
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Outer IP Header: The Outer IP Header consists of the following components:
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Outer UDP The Outer UDP Header consists of the following components:
Header:
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Destination Address: Generally, it is a first hop router's MAC address when the
VTEP is on a different address.
Source Address : It is the source MAC address of the router that routes the
packet.
VLAN: It is optional in a VXLAN implementation and will be designated by an
ethertype of 0×8100 and has an associated VLAN ID tag.
Ethertype: It is set to 0×0800 because the payload packet is an IPv4 packet.
The initial VXLAN draft does not include an IPv6 implementation, but it is
planned for the next draft.
Protocol: It is set to 0×11 to indicate that the frame contains a UDP packet .
Source IP: It is the IP address of originating VTEP.
Destination IP: : It is the IP address of target VTEP.
Source Port: Entropy of the inner frame. The entropy could be based on the
Inner L2 header or Inner L3 header.
VXLAN Port : IANA-assigned VXLAN Port (4789).
UDP Checksum: The UDP checksum field is transmitted as zero. When a packet
is received with a UDP checksum of zero, it is accepted for decapsulation.
Virtual Extensible LAN (VXLAN)