Cisco CATALYST 2960 - CHAPTER 7; Managing Switch Stacks; Understanding Stacks; A switch stack is a set of up to four Catalyst 2960-S switches connected through their stack ports. One of the switches controls the operation of the stack and is called the stack master. The stack master and the other switches in the stack are stack members. Layer 2 protocol presents the entire switch stack as a single entity to the network.

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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
ip igmp snooping vlan immediate-leave
Related Commands Command Description
ip igmp snooping report-suppression Enables IGMP report suppression.
show ip igmp snooping Displays the snooping configuration.
show ip igmp snooping groups Displays IGMP snooping multicast information.
show ip igmp snooping mrouter Displays the IGMP snooping router ports.
show ip igmp snooping querier Displays the configuration and operation information for
the IGMP querier configured on a switch.