3200 is the default UDP port for keepalive packets. Just look for the first line with port 3200 and note the destination IP, which is 192.168.254.4. Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/interfaces/92x/b-cisco- nexus-3000-nx-os-interfaces-configuration-guide- 92x/b-cisco-nexus-3000-nx-os-interfaces-configuration-guide-92x_chapter_0110.html