Access Node Control Protocol for IGMP

By using ANCP, IGMP is no longer terminated or proxied at the access node. Instead, IGMP passes through the access node transparently. B-RAS terminates both the data PVC and IGMP. After possible user permission verification, B-RAS may instruct the access node, by using GSMP, to establish a multicast branch for the subscriber port.

Access Node Control Protocol (ANCP), also known as Layer 2 Control (L2C) works with a special IGMP session to collect OIF mapping events in a scalable manner. For additional information about configuring ANCP for IGMP, see Configuring ANCP in the JunosE IP Services Configuration Guide.

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