50Bytes encapsulation ( L2 service MPLS encapsulation : 22Bytes )
!!! VxLAN over L2 MPLS service: 72 Bytes!!!
UDP/VxLAN port: 8472
QFX5k : UDP destination port is set to port 4789 by definition
VXLAN Header: This is an 8-byte field that has:
- Flags (8 bits): where the I flag MUST be set to 1 for a valid
VXLAN Network ID (VNI). The other 7 bits (designated "R") are
reserved fields and MUST be set to zero on transmission and
ignored on receipt.
- VXLAN Segment ID/VXLAN Network Identifier (VNI): this is a
24-bit value used to designate the individual VXLAN overlay
network on which the communicating VMs are situated. VMs in
different VXLAN overlay networks cannot communicate with each
other. 16 million VXLAN segments
- Reserved fields (24 bits and 8 bits): MUST be set to zero on
transmission and ignored on receipt.