Cisco WS-C3020 - Configuring IGMP Snooping

22-7
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-03
Chapter 22 Configuring IGMP Snooping and MVR
Configuring IGMP Snooping
Configuring IGMP Snooping
IGMP snooping allows switches to examine IGMP packets and make forwarding decisions based on their
content. These sections contain this configuration information:
• Default IGMP Snooping Configuration, page 22-7
• Enabling or Disabling IGMP Snooping, page 22-8
• Setting the Snooping Method, page 22-8
• Configuring a Multicast Router Port, page 22-9
• Configuring a Blade Server Statically to Join a Group, page 22-10
• Enabling IGMP Immediate Leave, page 22-11
• Configuring the IGMP Leave Timer, page 22-11
• Configuring TCN-Related Commands, page 22-12
• Configuring the IGMP Snooping Querier, page 22-14
• Disabling IGMP Report Suppression, page 22-16
Default IGMP Snooping Configuration
Table 22-3 shows the default IGMP snooping configuration.
Table 22-3 Default IGMP Snooping Configuration
Feature Default Setting
IGMP snooping Enabled globally and per VLAN
Multicast routers None configured
Multicast router learning (snooping) method PIM-DVMRP
IGMP snooping Immediate Leave Disabled
Static groups None configured
TCN
1
flood query count
1. TCN = Topology Change Notification
2
TCN query solicitation Disabled
IGMP snooping querier Disabled
IGMP report suppression Enabled