Configuring Mvr; Default Mvr Configuration; Mvr Configuration Guidelines And Limitations - Cisco Catalyst 3120 Software Manual

Configuring MVR

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 23-5
Table 23-5
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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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
23-20
Default MVR Configuration, page 23-20
MVR Configuration Guidelines and Limitations, page 23-20
Configuring MVR Global Parameters, page 23-21
Configuring MVR Interfaces, page 23-22
shows the default MVR configuration.
Default MVR Configuration
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.
Because MVR on the switch uses IP multicast addresses instead of MAC multicast addresses,
aliased IP multicast addresses are allowed on the switch. However, if the switch is interoperating
with Catalyst 3550 or Catalyst 3500 XL switches, you should not configure IP addresses that alias
between themselves or with the reserved IP multicast addresses (in the range 224.0.0.xxx).
Do not configure MVR on private VLAN ports.
Chapter 23
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-12247-01