Planet Technology IP DSLAM IDL-4801 - Manual (Page 219)

IP DSLAM 219
Forbidden Egress ports The set of ports, to which frames received from a specific port and
destined for a specific Multicast MAC address must not be
forwarded, regardless of any dynamic information. A port may not
be added in this set if it is already a member of the set of ports in
EgressPorts.
Cautions:
z
An entry in this table shall not be applicable for a bridge port created over
PPPOE/IPOE interface.
References:
z Bridge
commands.