Netgear XCM8810 Chassis User Manual - Page 753

NETGEAR 8800 User Manual Note: If a port is blocked by Layer 2 protocols, that port is removed from the egress list of the cache. This is done dynamically per the port state. For most situations, you do not need to manually configure ports to receive the MVR multicast streams. But if one of the forwarding rules denies forwarding to a port that requires the streams, you can manually receive the MVR multicast streams by using the following command: configure mvr vlan add receiver port Inter-Multicast VLAN Forwarding In Basic MVR Deployment on page 749, only simple topologies are considered, in which subscribers on different VLANs access a multicast VLAN. There are topologies where streams need to be forwarded onto another multicast VLAN, as shown in Figure 91. In this figure, a Multicast Service Provider (MSP) multicast VLAN is attached to ports 1:1-2 on both switches, SW1 and SW2. On the customer side, another multicast VLAN, delivers multicast streams to other switches around the ring. MSP ring 1:1 1:2 1:1 1:2 1:4 1:5 1:5 Sw6 Customer ring CustVlan 1:3 1:4 H2 H3 H4 EX_145 Figure 91. Inter-Multicast VLAN Forwarding In this topology, a multicast stream can be leaked into the customer multicast network through either switch SW1 or SW2. However, as described in MVR Forwarding on page 751, packets are not forwarded to router ports (ports 1:4 and 1:5 can be router ports if SW2 is an IGMP querier). To get around this, MVR needs to be configured on CustVlan either on SW1 or SW2. Since the forwarding rules apply only to non-MVR VLANs, traffic from one MVR VLAN is leaked into the router ports of another VLAN, if MVR is enabled on that. Chapter 27. Multicast Routing and Switching | 753