Refer to the exhibit.

For printing services using Bonjour in a WLAN environment where mDNS services are utilized, especially with WLC firmware version 8.x, it’s essential that:

Enable mDNS and IGMP snooping (Option A): Multicast DNS or mDNS needs to be enabled for Bonjour services to function correctly as they rely on this protocol for service discovery within local networks. IGMP snooping improves network efficiency by ensuring multicast traffic is only forwarded to nodes that have explicitly requested it.

References := ( CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide )