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Multicast Filtering Commands
4-401
4
• 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 allow a subscriber to dynamically join or
leave an MVR group (see
ip igmp snooping
on page 4-381). 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, statically assigns a multicast
group to a receiver port using the MVR VLAN, and then statically assigns an MVR
receiver group to the MVR receiver VLAN:
Summary of Contents for 6152PL2 FICHE
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