VPLS Features
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• The maximum number of multicast groups (static and dynamic) that a SAP or SDP can 
join can be configured. An event is generated when the limit is reached.
• The maximum number of multicast groups (static and dynamic) that a VPLS instance 
simultaneously supports can be configured.
• Proxy summarization of IGMP messages reduces the number of IGMP messages 
processed by upstream devices in the network.
• IGMP filtering allows a subscriber to a service or the provider to block, receive, or 
transmit permission (or both) to individual hosts or a range of hosts. 
The following types of filters can be defined: 
→ Filter group membership that report from a particular host or range of hosts. This 
filtering is performed by importing an appropriately-defined routing policy into the 
SAP or SDP.
→ Filters that prevent a host from transmitting multicast streams into the network. The 
operator can define a data-plane filter (ACL) that drops all multicast traffic, and apply 
this filter to a SAP or SDP.