Configuring Mvr; Default Mvr Configuration - Cisco WS-CBS3032-DEL Software Configuration Manual

Configuring MVR

IGMP leave was received. As soon as the leave message is received, the receiver port is removed from
multicast group membership, which speeds up leave latency. Enable the Immediate-Leave feature only
on receiver ports to which a single receiver device is connected.
MVR eliminates the need to duplicate multicast traffic for subscribers in each VLAN. Multicast traffic
for all channels is only sent around the VLAN trunk once—only on the multicast VLAN. The IGMP
leave and join messages are in the VLAN to which the subscriber port is assigned. These messages
dynamically register for streams of multicast traffic in the multicast VLAN on the Layer 3 device. The
access layer blade switch modifies the forwarding behavior to allow the traffic to be forwarded from the
multicast VLAN to the subscriber port in a different VLAN, selectively allowing traffic to cross between
two VLANs.
IGMP reports are sent to the same IP multicast group address as the multicast data. The blade switch
CPU must capture all IGMP join and leave messages from receiver ports and forward them to the
multicast VLAN of the source (uplink) port, based on the MVR mode.
Configuring MVR
These sections contain this configuration information:
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Default MVR Configuration

Table 24-5
Table 24-5
Feature
MVR
Multicast addresses
Query response time
Multicast VLAN
Mode
Interface (per port) default
Immediate Leave
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
24-20
Default MVR Configuration, page 24-20
MVR Configuration Guidelines and Limitations, page 24-21
Configuring MVR Global Parameters, page 24-21
Configuring MVR Interfaces, page 24-22
shows the default MVR configuration.
Default MVR Configuration
Chapter 24
Default Setting
Disabled globally and per interface
None configured
0.5 second
VLAN 1
Compatible
Neither a receiver nor a source port
Disabled on all ports
Configuring IGMP Snooping and MVR
OL-13270-06