Specifications

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
How to Configure EtherSwitch HWICs
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To disable IGMP snooping on a VLAN interface, use the no ip igmp snooping vlan vlan-id global
configuration command for the specified VLAN number (for example, vlan1).
Enabling IGMP Immediate-Leave Processing
When you enable IGMP Immediate-Leave processing, the EtherSwitch HWIC immediately removes a
port from the IP multicast group when it detects an IGMP version 2 Leave message on that port.
Immediate-Leave processing allows the switch to remove an interface that sends a Leave message from
the forwarding table without first sending out group-specific queries to the interface. You should use the
Immediate-Leave feature only when there is only a single receiver present on every port in the VLAN.
Use the following steps to enable IGMP Immediate-Leave processing.
SUMMARY STEPS
1. enable
2. configure terminal
3. ip igmp snooping vlan vlan-id immediate-leave
4. end
5. show ip igmp snooping
6. copy running-config startup-config
DETAILED STEPS
Step 5
show ip igmp snooping [vlan vlan-id]
Example:
Router# show ip igmp snooping vlan 1
Displays snooping configuration.
• (Optional) vlan-id is the number of the VLAN.
Step 6
copy running-config startup-config
Example:
Router# copy running-config startup-config
(Optional) Saves your configuration to the startup
configuration.
Command Purpose
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.