Cisco 3560G 48TS Software Configuration Guide - Page 388

Displaying MVR Information Chapter 19 Configuring IGMP Snooping and MVR 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 19-6 to display MVR configuration: Table 19-6 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 4094; do not enter leading zeros. 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. 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. IGMP filtering is only applicable to dynamic learning of IP multicast group addresses; not static configuration. 19-20 Catalyst 3560 Switch Software Configuration Guide 78-16156-01