Dante is a combination of software, hardware, and network protocols that delivers uncompressed, multi-channel, low-latency digital audio (and now video) over a standard Ethernet network. Dante is an acronym for Digital Audio Network Through Ethernet.
https://en.wikipedia.org/wiki/Dante_(networking)
While Gigabit switches are recommended, 100Mbps switches may be used in limited scenarios.
For low channel count (<32) applications, a 100Mbps switch may be used as long as it supports proper QoS, and QoS is active. The use of 100Mbps switches without QoS is not recommended or supported.
For higher channel counts, Gigabit switches are essential. QoS is recommended for Gigabit switches on networks that share data with services other than Dante.
IGMP is specified in two commonly used versions: v2 and v3. This difference is most easily seen on current macOS computers that use IGMP v3 on built-in Ethernet ports; these may fail when connected to IGMP v2 switches. An easy workaround is to use an Ethernet adapter, all of which use IGMP v2. https://www.audinate.com/blog/post/well-intentioned-mishaps-with-igmp-snooping
Alternately (at the switch level) you can ‘Forward All’ multicast traffic to the Mac. In effect, that disables IGMP snooping for that port. However, assuming the Mac has a Gigabit port, you should be fine.
For Link-Local networks, Dante expects primary interfaces to use the 169.254.x.x range, and secondary interfaces to use the 172.31.x.x range.
The primary and secondary interfaces should not share a subnet or IP space. If a Dante device resets to factory default settings it may revert to "Daisy-Chain" mode – meaning it is now bridging your primary and secondary networks instead of offering redudancy - causing multiple interfaces to use the same IP address.
(eth.dst[0] & 1)
udp.port == 4440
Some details on this page are derrived from packet inspection or other reverse-engineering techniques and are not officially released from Audinate.