Multicast

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Multicast Properties

 

 

 

 

 

Multicast entries can be learned by snooping (listening in on) the layer 3 protocols that manage multicast memberships:

IPv4 multicast group addresses can be learned through the Internet Group Management protocol (IGMP).

IPv6 multicast group addresses can be learned through the Multicast Listener Discovery (MLD) protocol.

Interfaces with IGMP and MLD multicast routers for a specific VLAN can be either statically or dynamic configured. The multicast routers use IGMP and MLD to manage the membership of the multicast groups. A multicast router is also required in order for the switch to support IGMP/MLD snooping properly in a VLAN.

Multicast Properties

You can use the Multicast Properties page to specify how multicast packets are forwarded within VLANs.

When you create a VLAN, a default multicast forwarding option is assigned. You can use the Global Multicast Mode setting to set all VLANs currently configured on the switch to a selected forwarding mode. The global setting does not create a default setting for VLANs created subsequently—it simply ensures that all existing VLANs are configured with the specified mode. You can also configure how the switch forwards multicast packets on an individual or per-VLAN basis.

Configuring a Multicast Forwarding Mode on all VLANs

To configure all current VLANs with a particular multicast forwarding mode:

STEP 1 Click Multicast > Properties in the navigation window.

STEP 2 Select a Global Multicast Mode to apply to all VLANs. If a VLAN has been configured with a different mode, it is reset to the following mode:

Forward Unregistered—If a packet is received from a VLAN with a multicast destination address and no ports in the VLAN are registered to receive multicast packets for that address, then the packet is flooded to all ports in the VLAN. The responsibility for accepting or dropping the packets belongs to the hosts. If a multicast packet is received and there are ports registered to receive it, the packet is sent only to the registered ports.

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Cisco Systems SLM2008PTNA manual Multicast Properties, Configuring a Multicast Forwarding Mode on all VLANs

SLM2008PTNA specifications

Cisco Systems SLM2008PTNA is a robust network switch designed specifically for small to medium-sized businesses. It operates with 8 Fast Ethernet ports, providing advanced features and best-in-class performance to enhance your network infrastructure. This model ensures seamless connectivity for multiple devices, making it an ideal choice for environments requiring reliable network communication.

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In conclusion, the Cisco Systems SLM2008PTNA is an essential component for small to medium-sized businesses looking to enhance their network performance. With its Layer 2 switching capabilities, Power over Ethernet support, advanced security features, and ease of management, this switch provides a well-rounded solution for modern networking needs, delivering reliable performance and scalability for growth.