Mvr Configuration Guidelines And Limitations; Configuring Mvr Global Parameters - Cisco WS-C3750-48PS-S Software Configuration Manual

Configuring MVR

MVR Configuration Guidelines and Limitations

Follow these guidelines when configuring MVR:
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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.
For complete syntax and usage information for the commands used in this section, refer to the command
Note
reference for this release.
Beginning in privileged EXEC mode, follow these steps to configure MVR parameters:
Command
Step 1 configure terminal
Step 2 mvr
Step 3
mvr group ip-address [count]
Catalyst 3750 Switch Software Configuration Guide
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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 3750 switch.
Because MVR on the Catalyst 3750 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.
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.
Purpose
Enter global configuration mode.
Enable MVR on the switch.
Configure an IP multicast address on the switch or use the count parameter to
configure a contiguous series of MVR group addresses (the range for count is
1 to 256; the default is 1). Any multicast data sent to this address is sent to all
source ports on the switch and all receiver ports that have elected to receive
data on that multicast address. Each multicast address would correspond to
one television channel.
Chapter 23 Configuring IGMP Snooping and MVR
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