Default Mvr Configuration; Mvr Configuration Guidelines And Limitations - Cisco WS-C3560-48PS-S Software Configuration Manual

Configuring MVR

Default MVR Configuration

Table 19-5
Table 19-5 Default MVR Configuration
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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Catalyst 3560 Switch Software Configuration Guide
19-16
shows the 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.
MVR multicast data received in the source VLAN and leaving from receiver ports has its
time-to-live (TTL) decremented by 1 in the Catalyst 3560 switch.
Because MVR on the Catalyst 3560 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).
MVR is not supported when multicast routing is enabled 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 can coexist with IGMP snooping on a switch.
MVR data received on an MVR receiver port is not forwarded to MVR source ports.
MVR does not support IGMPv3 messages.
Chapter 19
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
78-16156-01