AppleTalk and Bonjour services are not working when connected to Dell Networking N series switch in a VLAN with IGMP snooping enabled

AppleTalk, Bonjour, and multicast DNS (mDNS) traffic may not behave as expected and services depending on these protocols may fail.

AppleTalk and Bonjour use link-local multicast to communicate. IGMP snooping allows the switch to snoop on IGMP exchanges between hosts and multicast routers and perform multicast forwarding within a VLAN. When IGMP snooping is enabled the AppleTalk, Bonjour, and mDNS traffic may drop in Dell N series switch running OS6.

Unregistered multicast traffic is only flooded to router ports by default. The unregistered multicast traffic of AppleTalk, Bonjour, and mDNS gets dropped in the switch when the devices to be discovered are connected to interfaces on the same switch.

Use the below commands:

console# configure

console(config)# ip igmp snooping unregistered floodall