WhyIf the home network has been split into several sub-networks (dedicated network for: guests, IoT equipment, 3rd-party devices, …) usually to improve security, it could lead to the Chromecast devices not being discovered anymore.
Chromecast (or in my case the FreeBox POP) is detected by performing
an mdsn query, this type of query doesn’t cross network boundary
(multicast packet TTL is set to 1).
Two possible solutions are:
- if the firewall permit it, rewrite the
TTLfield to increase it’s value an allow it to cross the network - the packet can be repeated on other interfaces using a program
such as
mdns-repeater
Configuration example using mdns-repeater to repeat
mdns packet between interfaces Interface and
Interface
mdns_repeater_enable="YES"
mdns_repeater_interfaces=List of interfaces