Displaying Igmp Snooping Multicast Forwarding Entries - HP 1910 User Manual

Table 85 Configuration items
Item
Port
VLAN ID
Group Limit
Fast Leave

Displaying IGMP snooping multicast forwarding entries

1. Select Network > IGMP snooping from the navigation tree.
2. Click Show Entries to display information about IGMP snooping multicast forwarding entries.
Figure 245 Displaying entry information
3. To view detailed information about an entry, click the
Description
Select the port on which advanced IGMP snooping features will be configured. The port
can be an Ethernet port or Layer 2 aggregate interface.
After a port is selected, advanced features configured on this port are displayed at the
lower part of this page.
TIP:
Advanced IGMP snooping features configured on a Layer 2 aggregate interface do not
interfere with configurations 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 the ID of the VLAN in which the port functions are to be configured.
Configurations made in a VLAN take effect on the ports only in this VLAN.
Configure the maximum number of multicast groups that the port can join.
With this feature, you can regulate multicast traffic on the port.
IMPORTANT:
If the number of multicast groups on a port exceeds the limit that you are setting, the system
deletes all the forwarding entries related to that port from the IGMP snooping forwarding
table. The hosts on this port need to join the multicast groups again.
Enable or disable fast-leave processing on the port.
When a port that is enabled with the IGMP snooping fast-leave processing feature
receives an IGMP leave message, the switch immediately removes that port from the
forwarding entry for the multicast group specified in the message. When the switch
receives IGMP group-specific queries for that multicast group, it does not forward them to
that port.
On a port that has only one host attached, you can enable fast-leave processing to save
bandwidth and resources. However, on a port that has multiple hosts attached, do not
enable fast-leave processing if you have enabled dropping unknown multicast data for the
VLAN to which the port belongs. Otherwise, if a host on the port leaves a multicast group,
other hosts attached to the port in the same multicast group cannot receive the multicast
data for the group.
icon for the entry.
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