Digisol DG-GS4826S, Management Manual

Page: 462 / 1344

C
HAPTER
16 | Multicast Filtering
Multicast VLAN Registration
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C
OMMAND
U
SAGE
u
A port configured as an MVR receiver or source port can join or leave
multicast groups configured under MVR. However, note that these ports
can also use IGMP snooping to join or leave any other multicast groups
using the standard rules for multicast filtering.
u
Receiver ports can belong to different VLANs, but should not be
configured as a member of the MVR VLAN. IGMP snooping is used to
allow a receiver port to dynamically join or leave multicast groups
within an MVR VLAN. Multicast groups can also be statically assigned to
a receiver port (see "Assigning Static Multicast Groups to Interfaces" on
page 464 ).
Receiver ports should not be statically configured as a member of the
MVR VLAN. If so configured, its MVR status will be inactive.
u
One or more interfaces may be configured as MVR source ports. A
source port is able to both receive and send data for configured MVR
groups or for groups which have been statically assigned (see
"Assigning Static Multicast Groups to Interfaces" on page 464 ).
All source ports must belong to the MVR VLAN.
Subscribers should not be directly connected to source ports.
u
Immediate leave applies only to receiver ports. When enabled, the
receiver port is immediately removed from the multicast group
identified in the leave message. When immediate leave is disabled, the
switch follows the standard rules by sending a query message to the
receiver port and waiting for a response to determine if there are any
remaining subscribers for that multicast group before removing the
port from the group list.
n
Using immediate leave can speed up leave latency, but should only
be enabled on a port attached to one multicast subscriber to avoid
disrupting services to other group members attached to the same
interface.
n
Immediate leave does not apply to multicast groups which have
been statically assigned to a port.
P
ARAMETERS
These parameters are displayed in the web interface:
u
Port – Port identifier.
u
Type – The following interface types are supported:
n
Source – An uplink port that can send and receive multicast data
for the groups assigned to the MVR VLAN. Note that the source port
must be manually configured as a member of the MVR VLAN (see
"Adding Static Members to VLANs" on page 176 ).
n
Receiver – A subscriber port that can receive multicast data sent
through the MVR VLAN. Any port configured as an receiver port will
be dynamically added to the MVR VLAN when it forwards an IGMP
report or join message from an attached host requesting any of the