Installation manual

3-262
SIGNAMAX LLC • www.signamax.eu
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
• 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, but should not be configured as a
member of the MVR VLAN. 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 3-263). However, if a receiver port is statically configured as a
member of an MVR VLAN, its MVR 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 3-189).
• 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 3-263).
• 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.
- 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. Note that the source port must be manually configured
as a member of the MVR VLAN (see “Adding Static Members to VLANs (VLAN
Index)” on page 3-186).
- 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 designated multicast services supported by the MVR VLAN.
- Non-MVR – An interface that does not participate in the MVR VLAN. (This is the
default type.)