Cisco Systems 3750E Displaying MVR Information, Configuring Igmp Filtering and Throttling, 24-24

Chapter 24 Configuring IGMP Snooping and MVR

Displaying MVR Information

Displaying MVR Information

You can display MVR information for the switch or for a specified interface. Beginning in privileged EXEC mode, use the commands in Table 24-6to display MVR configuration:

Table 24-6 Commands for Displaying MVR Information

Command	Purpose
show mvr	Displays MVR status and values for the switch—whether MVR is enabled or disabled,
	the multicast VLAN, the maximum (256) and current (0 through 256) number of
	multicast groups, the query response time, and the MVR mode.
show mvr interface [interface-id]	Displays all MVR interfaces and their MVR configurations.
[members [vlan vlan-id]]	When a specific interface is entered, displays this information:
	•	Type—Receiver or Source
	•	Status—One of these:
		– Active means the port is part of a VLAN.
		– Up/Down means that the port is forwarding or nonforwarding.
		– Inactive means that the port is not part of any VLAN.
	• Immediate Leave—Enabled or Disabled
	If the members keyword is entered, displays all multicast group members on this port or,
	if a VLAN identification is entered, all multicast group members on the VLAN. The
	VLAN ID range is 1 to 1001 and 1006 to 4094.
show mvr members [ip-address]	Displays all receiver and source ports that are members of any IP multicast group or the
	specified IP multicast group IP address.

Configuring IGMP Filtering and Throttling

In some environments, for example, metropolitan or multiple-dwelling unit (MDU) installations, you might want to control the set of multicast groups to which a user on a switch port can belong. You can control the distribution of multicast services, such as IP/TV, based on some type of subscription or service plan. You might also want to limit the number of multicast groups to which a user on a switch port can belong.

With the IGMP filtering feature, you can filter multicast joins on a per-port basis by configuring IP multicast profiles and associating them with individual switch ports. An IGMP profile can contain one or more multicast groups and specifies whether access to the group is permitted or denied. If an IGMP profile denying access to a multicast group is applied to a switch port, the IGMP join report requesting the stream of IP multicast traffic is dropped, and the port is not allowed to receive IP multicast traffic from that group. If the filtering action permits access to the multicast group, the IGMP report from the port is forwarded for normal processing. You can also set the maximum number of IGMP groups that a Layer 2 interface can join.

IGMP filtering controls only group-specific query and membership reports, including join and leave reports. It does not control general IGMP queries. IGMP filtering has no relationship with the function that directs the forwarding of IP multicast traffic. The filtering feature operates in the same manner whether CGMP or MVR is used to forward the multicast traffic.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
24-24	OL-9775-02