Topologies Where The Multicast Source Is Not Directly Connected To The Querier; Using Static Multicast Mac Configuration; Igmp Snooping And Gmrp; Pcm6220 Restrictions - Dell M6220 User Configuration Manual

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Topologies Where the Multicast Source Is Not Directly Connected to the

If the multicast source is not directly connected to a multicast querier, the

multicast stream is forwarded to any router ports on the switch (within the

VLAN). Because multicast router queries are flooded to all ports in the

VLAN, intermediate IGMP snooping switches will receive the multicast

stream from the multicast source and forward it to the multicast router.

If configuring static multicast MAC group addresses on a port in a VLAN, it is

necessary to configure all ports in the VLAN over which it is desired that the

group traffic flow (both host and router) on all switches. IGMP snooping does

not dynamically add ports to a VLAN for a multicast group when a static

entry is configured for that group in the VLAN. This restriction applies to

both multicast router-connected ports and host-connected ports.

IGMP snooping and GMRP are not compatible. Only one of IGMP snooping

or GMRP should be configured to filter multicast groups for any VLAN.

Simultaneous operation of GMRP and IMGP snooping is not supported and

will lead to undesirable results, such as flooding in the VLAN due to the

inability to identify multicast router ports.

The PCM6220 floods unregistered IPv4 and IPv6 multicast on all ports (same

behavior as in release 5.0). There is no configurable option to change this

behavior. In addition, the PCM6220 may not flood all reserved IPv6 multicast

to all ports as it only supports registration/filtering on the last four octets of

the IPv6 multicast address. For example, if a multicast host registers for

33:33::05 on interface gi1/0/3, traffic addressed to FF:FF:00:05 (OSPFv3) will

not be flooded to all ports, but will instead be forwarded to gi1/0/3. This

behavior does not affect IPv4 multicast control plane traffic.

Configuring L2 Multicast Features

M8024 M6348 M8024-k