Cli Example; Igmp Proxy; Cli Examples - Dell PowerConnect M6220 Configuration Manual

CLI Example

The following example configures IGMP on a PowerConnect 6200 Series switch. IP routing, IP
multicasting, and IGMP are globally enabled on the router. Then, IGMP is configured on the selected
interface(s).
console#configure
ip routing
ip multicast
ip igmp
interface vlan 2
routing
ip address 3.3.3.1 255.255.255.0
ip igmp
exit
exit
A multicast router must also have a way to determine how to efficiently forward multicast packets. The
information gathered by IGMP is provided to a multicast routing protocol (i.e., DVMRP , PIM-DM, and
PIM-SM) configured on the router to ensure that multicast packets are delivered to all networks where
there are interested receivers. Refer to those sections for configuration instructions.

IGMP Proxy

IGMP proxy enables a multicast router to learn multicast group membership information and forward
multicast packets based upon the group membership information. The IGMP Proxy is capable of
functioning only in certain topologies that do not require Multicast Routing Protocols (i.e., DVMRP,
PIM-DM, and PIM-SM) and have a tree-like topology, as there is no support for features like reverse path
forwarding (RPF) to correct packet route loops.
The proxy contains many downstream interfaces and a unique upstream interface explicitly configured.
It performs the host side of the IGMP protocol on its upstream interface and the router side of the IGMP
protocol on its downstream interfaces.
The IGMP proxy offers a mechanism for multicast forwarding based only on IGMP membership
information. The router must decide about forwarding packets on each of its interfaces based on the
IGMP membership information. The proxy creates the forwarding entries based on the membership
information and adds it to the multicast forwarding cache (MFC) in order not to make the forwarding
decision for subsequent multicast packets with same combination of source and group.

CLI Examples

The CLI component of the Dell switch allows the end users to configure the network device and to view
device settings and statistics using a serial interface or telnet session.
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Multicast