the-tcpdump-group/tcpdump — pull request #310 by ffatghub (2013-05-10 08:10:58+00:00)
Title: vxlan: use IANA assigned port

IANA (http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt) has assigned an official port for VXLAN (4789). tcpdump uses this by default but we keep the -T vxlan option as well (e.g. Linux is allowing different ports).