Installation manual

4-332
SIGNAMAX LLC • www.signamax.eu
command (page 4-246), but MVR receiver ports should not be statically configured
as members of this VLAN.
• IGMP snooping must be enabled to a allow a subscriber to dynamically join or leave
an MVR group (see ip igmp snooping on page 4-314). Note that only IGMP
version 2 or 3 hosts can issue multicast join or leave messages.
• IGMP snooping and MVR share a maximum number of 255 groups. Any multicast
streams received in excess of this limitation will be flooded to all ports in the
associated VLAN.
• Multicast traffic forwarded to subscribers is normally stripped of frame tags to
prevent the hosts from discovering the identity of the MVR VLAN. To allow multicast
traffic with tagged frames to be sent to subscribers without revealing the identity of
the MVR VLAN, both the receiver-group and receiver-vlan attributes must be
specifically defined. If a port is manually assigned to the reciever VLAN as a tagged
member, multicast traffic forwarded to the subscriber will also carry tags.
Note that the receiver-group and group attributes cannot be configured with the
same addresses. Nor can the receiver-vlan and vlan attributes be configured with
the same VLAN.
Example
The following example enables MVR globally, sets the MVR VLAN, and configures a
range of MVR group addresses:
This example sets the MVR VLAN, and configures a range of receiver group addresses:
Console(config)#mvr
Console(config)#mvr vlan 2
Console(config)#mvr group 228.1.23.1 10
Console(config)#
Console(config)#mvr receiver-vlan 3
Console(config)#mvr receiver-group 228.1.23.2
Console(config)#