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20-16

Catalyst 3550 Multilayer Switch Software Configuration Guide

78-11194-09

Chapter 20 Configuring IGMP Snooping and MVR

Configuring MVR

These sections include basic MVR configuration information:

• Default MVR Configuration, page 20-16

• MVR Configuration Guidelines and Limitations, page 20-16

• Configuring MVR Global Parameters, page 20-17

• Configuring MVR Interfaces, page 20-18

Default MVR Configuration

Table 20-5 shows the default MVR configuration.

MVR Configuration Guidelines and Limitations

Follow these guidelines when configuring MVR:

• Receiver ports 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 that can be configured on a switch (that is, the maximum

number of television channels that can be received) is 256.

• Each channel is one multicast stream destined for a unique IP multicast address. These IP addresses

cannot alias between themselves or with the reserved IP multicast addresses (in the

range 224.0.0.xxx).

• Multicast routing and MVR cannot coexist on a switch. If you enable multicast routing and a

multicast routing protocol while MVR is enabled, MVR is disabled, and you receive a warning

message. If you try to enable MVR while multicast routing and a multicast routing protocol are

enabled, the operation to enable MVR is cancelled, and you receive an error message.

• MVR does not support IGMPv3 messages.

Note For complete syntax and usage information for the commands used in this section, refer to the command

reference for this release.

Table 20-5 Default MVR Configuration

Feature Default Setting

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

Cisco Catalyst 3550 Series User Manual

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