Broadcast and Multicast Controls

To help you manage the flow of traffic that crosses Tunnel Concentrator, configure settings that allow or deny specific broadcast and multicast traffic, thereby avoiding packet loss when traffic is at its peak. The following options are available:

• With broadcast traffic, you can configure Tunnel Concentrator to block non-essential broadcast traffic (this option is selected by default). When this option is selected, only ARP and DHCP broadcast traffic is forwarded. When this option is deselected, Tunnel Concentrator floods broadcast traffic to all APs.
• With multicast traffic, you can configure rules that allow multicasting for specific multicast addresses. You can assign multiple rules to a Tunnel Concentrator. Tunnel Concentrator forwards multicast traffic only if there is an assigned rule that allows the destination multicast address. Otherwise, Tunnel Concentrator blocks multicast packets.

To configure broadcast and multicast controls, use the following configurations:

• With ExtremeCloud IQ-managed deployments, configure broadcast and multicast control using the Tunnel Concentrator Service configuration on ExtremeCloud IQ.
• With ExtremeCloud IQ Controller-managed deployments, configure broadcast and multicast controls using Advanced settings for the VLAN with the GRE topology configuration that Tunnel Concentrator uses.

Note

The Broadcast and Multicast Controls configurations cover how Tunnel Concentrator handles broadcast and multicast traffic that attempts to crosses Tunnel Concentrator. Additional broadcast and multicast configurations that you apply throughout your network can impact the amount of broadcast and multicast traffic that attempts to cross Tunnel Concentrator.