We have a site that has a few condo buildings with about 70 XV2-22H APs as well as a few common area APs (XV2-T0 and XE3-4). We just started having brief IPv6 traffic storms that overwhelm the network with 3-6 Gbps of traffic. Packet capture shows it as IPv6 link local SSDP packets with a single source and single destination. The source and destination are on different APs and different VLANs. I’m trying to understand how the traffic is crossing VLANs and how it can be amplified so quickly. When the storm starts, I see 800-900M for both transmit and receive on the Ethernet port of all APs. We are using ePSK with a different VLAN for each condo unit. So each VLAN has very few clients. Is there something we need to set to block multicast and/or broadcast between VLANs on the APs?