SMC Networks 7824M/FSW - annexe 1, Management Manual

Page: 333 / 748

M
ULTICAST
VLAN R
EGISTRATION
15-17
Configuring MVR Interface Status
Each interface that participates in the MVR VLAN must be configured as
an MVR source port or receiver port. If only one subscriber attached to an
interface is receiving multicast services, you can enable the immediate leave
function.
Command Usage
• One or more interfaces may be configured as MVR source ports.
• MVR receiver ports cannot be members of a trunk. Receiver ports can
belong to different VLANs, but should not be configured as a member
of the MVR VLAN.
• IGMP snooping can be used to allow a source port or receiver port to
dynamically join or leave multicast groups within the MVR VLAN using
the standard rules for multicast filtering. Multicast groups can also be
statically assigned to a source port or receiver port (see “Assigning Static
Multicast Groups to Interfaces” on page 15-20).
• 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. 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. Note that immediate leave does not apply to
multicast groups which have been statically assigned to a port.
Command Attributes
• MVR Type – The following interface types are supported:
- Source – An uplink port that can send and receive multicast data for
the groups assigned to the MVR VLAN.
- Receiver – A subscriber port that can receive multicast data sent
through the MVR VLAN.