HP V1910 manual Display Igmp snooping multicast entry information, Group Limit

2.Configuration items for advanced IGMP snooping features

ItemDescription

Select the port on which advanced IGMP snooping features are to be configured. The port can be an Ethernet port or Layer-2 aggregate port.

After a port is selected, advanced features configured on this port are displayed at the lower part of this page.

Port	IMPORTANT:
	Advanced IGMP snooping features configured on a Layer 2 aggregate port do not interfere
	with features configured on its member ports, nor do they take part in aggregation
	calculations; features configured on a member port of the aggregate group will not take
	effect until it leaves the aggregate group
	Specify a VLAN in which you can configure the fast leave function for the port or the
VLAN ID	maximum number of multicast groups allowed on the port.

Configurations made in a VLAN take effect for the ports in this VLAN only.

Configure the maximum number of multicast groups that the port can join.

With this feature, you can regulate multicast traffic on the port.

Group Limit IMPORTANT:

When the number of multicast groups a port has joined reaches the configured threshold, the system deletes all the forwarding entries persistent on that port from the IGMP snooping forwarding table, and the hosts on this port need to join the multicast groups again.

Enable or disable the fast leave function for the port.

With the fast leave function enabled on a port, the switch, when receiving an IGMP leave message on the port, immediately deletes that port from the outgoing port list of the corresponding forwarding table entry. Then, when receiving IGMP group-specific queries for that multicast group, the switch does not forward them to that port. In VLANs where

Fast Leave only one host is attached to each port, the fast leave function helps improve bandwidth and resource usage.

IMPORTANT:

If fast leave is enabled for a port to which more than one host is attached, when one host leaves a multicast group, the other hosts listening to the same multicast group fails to receive multicast data.

Return to Configuration task list.

Display IGMP snooping multicast entry information

Select Network  IGMP Snooping in the navigation tree to enter the basic configuration page shown in a. Click the plus sign (+) in front of Show Entries to display information about IGMP snooping multicast entries, as shown in a. You can view the detailed information of an entry by clicking the icon corresponding to the entry.

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