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

Summary: This article resolves issues with AppleTalk and Bonjour services not working on Dell N series switches.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

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

Cause

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.

Resolution

Use the below commands:

Command Parameters
console# configure
Enter configuration mode.
console(config)# ip igmp snooping unregistered floodall
This command enables flooding of unregistered multicast traffic to all interfaces in the VLAN. This allows multicast traffic to flood to other interfaces.





 

 

Affected Products

PowerSwitch N1100-ON Series, PowerSwitch N1500 Series, PowerSwitch N2000 Series, PowerSwitch N2100 Series, PowerSwitch N2200-ON Series, PowerSwitch N3000 Series, Dell EMC PowerSwitch N3000E-ON Series, Dell EMC PowerSwitch N3100 Series , Dell EMC Networking N3200-ON, PowerSwitch N4000 Series ...
Article Properties
Article Number: 000148828
Article Type: Solution
Last Modified: 10 Jun 2024
Version:  4
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