Configuration Guide Configuring IGMP Snooping
Leave Packets
If a host requests to leave a profile, it will send a Leave packet.
When the device running IGMP snooping receives the Leave packets, it performs the following operations within the VLAN:
Forward the leave packets from all the router ports.
If the port on which leave packets are received is a dynamic member port and the Leave function is enabled, the port
will be immediately deleted from the IGMP snooping forwarding entry of the designated profile and will no longer be
used as the dynamic member port.
If the port on which the leave packets are received is a dynamic member port and the Leave function is disabled, the
port state should be maintained.
Related Configuration
Configuring a Static Router Port
Run the ip igmp snooping vlan mrouter interface command to configure a static router port.
Configuring a Static Member Port
Run the ip igmp snooping vlan static interface command to configure a static member port.
Enabling Report Suppression
Report suppression is disabled by default.
Run the ip igmp snooping suppression enable command to enable report suppression.
After report suppression is enabled, in one IGMP query cycle, only the first Report packet received by each profile will be
forwarded. The source media access control (MAC) address of the forwarded report will be changed to the MAC address of
the device.
Enabling Immediate Leave
Immediate leave is disabled by default.
Run the ip igmp snooping fast-leave enable command to enable immediate leave.
Enabling Dynamic Router Port Learning
Dynamic router port learning is enabled by default.
Run the no ip igmp snooping mrouter learn pim-dvmrp command to disable dynamic router port learning.
Run the no ip igmp snooping vlan vid mrouter learn pim-dvmrp command to disable dynamic router port learning for
designated VLANs.
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