TP-Link TL-SG5426 User Guide - Page 461

4 Command Line Interface 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. • 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 receiver port to dynamically join or leave multicast groups within the MVR VLAN. Multicast groups can also be statically assigned to a receiver port using the group keyword. • 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 using the group keyword. • The IP address range from 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. • 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. • IGMP snooping must be enabled to a allow a subscriber to dynamically join or leave an MVR group (see ip igmp snooping on page 4-202). Note that only IGMP version 2 or 3 hosts can issue multicast join or leave messages. Example The following configures one source port and several receiver ports on the switch, enables immediate leave on one of the receiver ports, and statically assigns a multicast group to another receiver port: Console(config)#interface ethernet 1/5 Console(config-if)#mvr type source Console(config-if)#exit Console(config)#interface ethernet 1/6 Console(config-if)#mvr type receiver Console(config-if)#mvr immediate Console(config-if)#exit Console(config)#interface ethernet 1/7 Console(config-if)#mvr type receiver Console(config-if)#mvr group 225.0.0.5 Console(config-if)# 4-220