SMC Networks SMC7816M, SMC7816VSW F, 16-26, Configuring MVR Interfaces

M ULTICAST F ILTERING
16-26
Configuring MVR Interfaces
Each interface that participates in the MVR VLAN must be configured as
an MVR source port or receiver port. If only one subscri ber attached to an
interface is receiving multicast services, you can enable the immediate leave
function.
Command Usage
• MVR source ports and receiver ports can be members of more than on
MVR domain. However, an interface cannot be receiver port in one
MVR domain and a source port in another domain.
• A port which is not configured as an MVR receiver or source port can
use IGMP snooping to join or leave multicast groups using the standard
rules for multicast filtering.
• Receiver ports can belong to different VLANs. IGMP snooping can be
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 16-30). However, if a receiver port is statically configured as a
member of an MVR VLAN, its status will be inactive. Also, note that
VLAN membership for MVR receiver ports cannot be set to trunk mode
(see “Configuring VLAN Behavior for Interfaces” on page 13-15).
• One or more interfaces may be configured as MVR source ports. A
source port is able to both receive and send data for multicast groups
which it has joined through IGMP snooping or which have been
statically assigned (see “Assigning Static Multicast Groups to Interfaces”
on page 16-30).
• 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 group-specific query 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.