What does the "drop-mcast" option do?

Aruba Employee
Aruba Employee

Product and Software: This article applies to ArubaOS 3.3 and later.


When the Voice Services Module (VSM) license is installed, the "drop-mcast" option is configurable under the ssid profile.


This function is useful in these environments:


  •  High number of clients in a large subnet.
  •  Clients renew DHCP when they are roaming every time.
  •  Battery capacity of the clients is limited.
  •  Clients do not use any broadcast-based protocols (for example, Windows Share).

When the "drop-mcast" option is enabled, all the unknown broadcast and multicast traffics egressing from the Access Point (AP) are dropped. You need to enable the "voip-proxy-arp" option for the "drop-mcast" option to work.


When this feature is enabled, downstream DHCP and ARP broadcast packets are automatically converted to unicast and forwarded to the valid client.




To enable the "voip-proxy-arp" option from the command line interface (CLI)


(Lab)#(config)firewall voip-proxy-arp



To enable the "drop-mcast" option:


wlan ssid-profile <Name>  drop-mcast

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‎07-02-2014 09:10 AM
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