Dell PowerConnect M6220, Руководство по настройке пользователя

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Configuring L2 Multicast Features
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Topologies Where the Multicast Source Is Not Directly Connected to the
Querier
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.
Using Static Multicast MAC Configuration
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
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.
PCM6220 Restrictions
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.