By default, Google Chrome sends SSDP network broadcast traffic on the local subnet.
M-SEARCH * HTTP/1.1
HOST: 239.255.255.250:1900
MAN: "ssdp:discover"
MX: 1
ST: urn:dial-multiscreen-org:service:dial:1
USER-AGENT: Google Chrome/65.0.3325.162 Windows
To disable the media router feature, launch Chrome and enter chrome://flags/
Search for “media router” and disable the feature.