Planet Technology SGSD-1022 - Manual (Page 220)

User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
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satisfied. (Running status is true as long as MVR Status is enabled, and the
specified MVR VLAN exists.)
• MVR VLAN Identifier of the VLAN that serves as the channel for streaming multicast services
using MVR. MVR source ports should be configured as members of the
MVR VLAN (see “Adding Static Members to VLANs (VLAN Index)”), but MVR
receiver ports should not be manually configured as members of this VLAN.
Range: 1-4094;
Default: 1
• MVR Group IP IP address for an MVR multicast group. The IP address range of 224.0.0.0 to
239.255.255.255 is used for multicast streams. MVR group addresses cannot fall
within the reserved IP multicast address range of 224.0.0.x.
Range: 224.0.1.0 - 239.255.255.255;
Default: no groups are assigned to the MVR VLAN
• Count The number of contiguous MVR group addresses.
Range: 1-255;
Default: 0
4.9.3.2 MVR Port Configuration
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”). 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”).
• 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”).
• 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.