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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 11 Configuring IGMP Snooping and MVR
Understanding Multicast VLAN Registration
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.xx).
Note For complete syntax and usage information for the commands used in this section, refer to the
Catalyst 2950 Desktop Switch Command Reference for this release.
Default MVR Configuration
Table 11-3 shows the default MVR configuration.
Configuring MVR Global Parameters
You do not need to set the optional MVR parameters if you choose to use the default settings. If you do
want to change the default parameters (except for the MVR VLAN), you must first enable MVR.
Beginning in privileged EXEC mode, follow these steps to configure MVR parameters:
Table 11-3 Default MVR Configuration
Feature Default Setting
MVR Disabled globally and per interface
Multicast addresses None configured
Group IP address count 1
Query response time 0.5 second
Multicast VLAN VLAN 1
Mode Compatibility
Interface (per port) default Neither a receiver or source port
Immediate Leave Disabled on all ports
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
mvr Enable MVR on the switch.
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