CHAPTER
23-1
Catalyst 3750 Switch Software Configuration Guide
78-16180-02
23
Configuring IGMP Snooping and MVR
This chapter describes how to configure Internet Group Management Protocol (IGMP) snooping on the
Catalyst 3750 switch, including an application of local IGMP snooping, Multicast VLAN Registration
(MVR). It also includes procedures for controlling multicast group membership by using IGMP filtering
and procedures for configuring the IGMP throttling action. Unless otherwise noted, the term switch
refers to a standalone switch and a switch stack.
Note For complete syntax and usage information for the commands used in this chapter, refer to the switch
command reference for this release and the “IP Multicast Routing Commands” section in the Cisco IOS
IP Command Reference, Volume 3 of 3:Multicast, Release 12.2.
This chapter consists of these sections:
• Understanding IGMP Snooping, page 23-1
• Configuring IGMP Snooping, page 23-6
• Displaying IGMP Snooping Information, page 23-12
• Understanding Multicast VLAN Registration, page 23-13
• Configuring MVR, page 23-15
• Displaying MVR Information, page 23-19
• Configuring IGMP Filtering and Throttling, page 23-19
• Displaying IGMP Filtering and Throttling Configuration, page 23-25
Note You can either manage IP multicast group addresses through features such as IGMP snooping and MVR,
or you can use static IP addresses.
Understanding IGMP Snooping
Layer 2 switches can use IGMP snooping to constrain the flooding of multicast traffic by dynamically
configuring Layer 2 interfaces so that multicast traffic is forwarded to only those interfaces associated
with IP multicast devices. As the name implies, IGMP snooping requires the LAN switch to snoop on
the IGMP transmissions between the host and the router and to keep track of multicast groups and
member ports. When the switch receives an IGMP report from a host for a particular multicast group,
To Next Page
Loading...
Need help?
General