H3C Technologies H3C WA3600 Series Access Points - Manual (Page 122)

109
Figure 109 Advanced configuration
3. Configure IGMP snooping on a port as described in Table 51 .
4. Click Apply.
Table 51 Configuration items
Item Description
Port
Select the port on which advanced IGMP snooping features are to be configured.
After a port is selected, advanced features configured on this port are displayed at the
lower part of this page.
VLAN ID
Specify a VLAN in which you can configure the fast leave function for the port or the
maximum number of multicast groups allowed on the port.
Group Limit
Configure the maximum number of multicast groups that the port can join.
With this feature, you can regulate multicast traffic on the port.
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.
Fast Leave
Enable or disable the fast leave function for the port.
With the fast leave function enabled on a port, the device, 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 device will not forward them to that port. In VLANs where 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 will fail to
receive multicast data.