A network engineer is debugging issues with the mDNS gateway. Which type of reply should be seen in the Wireshark capture when querying for a mDNS service in the Bonjour Cache?

Prime Infrastructure does not act as the mDNS responder in the Bonjour gateway architecture - that role belongs to the WLC.

When a client queries for an mDNS service, the WLC Bonjour cache intercepts the multicast query and replies via unicast directly from the controller. This prevents multicast from flooding across subnets and VLANs, which is the core purpose of the mDNS gateway feature. Seeing a unicast reply from the controller IP confirms the gateway is functioning and serving responses from its local cache.

End devices reply via multicast only in a native mDNS environment with no gateway; a gateway architecture suppresses device-originated multicast replies to clients on other subnets.

The controller replies via unicast, not multicast - sending a multicast reply would defeat the purpose of the gateway by still flooding the network segment.

In a gateway deployment the controller answers on behalf of devices, so clients do not receive direct unicast replies from the advertising devices.

Prime Infrastructure has no role in the mDNS gateway packet flow between clients and the WLC Bonjour cache.