Configuring Mvr - Cisco Catalyst 4500 series Administration Manual

Chapter 27 Configuring IGMP Snooping and Filtering, and MVR
Because MVR multicast traffic is sent only on mVLANs, duplicating television-channel multicast traffic
for subscribers on different VLANs is unnecessary. The IGMP leave and join messages are in the VLAN
to which the subscriber port is assigned. The access layer switch (Switch A) modifies the forwarding
behavior to allow traffic forwarding from the multicast VLAN to the subscriber port in a different
VLAN. This is done by selectively allowing traffic to cross between the two VLANs.
IGMP reports are sent to the same IP multicast group address as the multicast data. The Switch A CPU
must capture all IGMP join and leave messages from the receiver ports and forward them to the multicast
VLAN of the source (uplink) port, based on the MVR mode.

Configuring MVR

These sections include basic MVR configuration information:
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Default MVR Configuration
Note Enabling the MVR command will set all the MVR default parameters.
Table 27-2
Table 27-2
Feature
MVR
Multicast addresses
Query response time
Multicast VLAN
Mode
Interface (per port) default
Immediate Leave
MVR Configuration Guidelines and Limitations
Follow these guidelines when configuring MVR:
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OL_28731-01
Default MVR Configuration, page 27-23
MVR Configuration Guidelines and Limitations, page 27-23
Configuring MVR Global Parameters, page 27-24
Configuring MVR on Access Ports, page 27-26
Configuring MVR on a Trunk Port, page 27-27
Displaying MVR Information, page 27-29
shows the default MVR configuration.
Default MVR Configuration
Ports can be configured as either a source port or a receiver port.
Ports connected to subscribers are configured as receiver ports.
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Default Setting
Disabled globally
None configured
5 (tenths of a second)
VLAN 1
Compatible
Neither a receiver nor a source port
Disabled on all ports
Software Configuration Guide—Release IOS XE 3 6.0E and IOS 15.2(2)E
Configuring MVR
27-23