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Configuring Transactional Multicast 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 any user permission verification, B-RAS may instruct the access node (using GSMP) to establish a multicast branch for the subscriber port.

ANCP works with a special IGMP session to collect OIF mapping events in a scalable manner. For additional information about configuring IGMP and about OIF mapping, see Configuring IGMP in JUNOSe Multicast Routing Configuration Guide.

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