Cisco Systems 3560 Manual De Usuario

These messages dynamically register for streams of multicast traffic in the multicast VLAN on the 
Layer 3 device. Switch B. The access layer switch, Switch A, 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 Switch A 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.

These sections contain this configuration information:

 shows the default MVR configuration.

Follow these guidelines when configuring MVR:

Receiver ports can only be access ports; they cannot be trunk ports. Receiver ports on a switch can 
be in different VLANs, but should not belong to the multicast VLAN.

The maximum number of multicast entries (MVR group addresses) that can be configured on a 
switch (that is, the maximum number of television channels that can be received) is 256.

MVR multicast data received in the source VLAN and leaving from receiver ports has its 
time-to-live (TTL) decremented by 1 in the switch.

MVR

Disabled globally and per interface

Multicast addresses

None configured

Query response time

0.5 second

Multicast VLAN

VLAN 1

Mode

Compatible

Interface (per port) default

Neither a receiver nor a source port

Immediate Leave

Disabled on all ports