Mvr Configuration Guidelines And Limitations; Configuring Mvr Global Parameters - Cisco Catalyst 2975 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, see 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]
Step 4
mvr querytime value
Step 5 mvr vlan vlan-id
Catalyst 2975 Switch Software Configuration Guide
22-20
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 switch.
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).
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.
(Optional) Define the maximum time to wait for IGMP report memberships
on a receiver port before removing the port from multicast group membership.
The value is in units of tenths of a second. The range is 1 to 100, and the
default is 5 tenths or one-half second.
(Optional) Specify the VLAN in which multicast data is received; all source
ports must belong to this VLAN. The VLAN range is 1 to 1001 and 1006 to
4094. The default is VLAN 1.
Chapter 22 Configuring IGMP Snooping and MVR
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