32
2.
Enter VLAN view or VSI
view.
•
Enter VLAN view:
vlan vlan-id
•
Enter VSI view:
vsi
vsi-name
N/A
3.
Enable dropping unknown
multicast data for the VLAN
or VSI.
igmp-snooping drop-unknown
By default, dropping unknown
multicast data is disabled, and
unknown multicast data is
flooded.
Enabling IGMP report suppression
This feature enables the device to forward only the first IGMP report for a multicast group to its
directly connected Layer 3 device. Other reports for the same group in the same query interval are
discarded. Use this feature to reduce multicast traffic.
To enable IGMP report suppression:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IGMP-snooping view.
igmp-snooping
N/A
3.
Enable IGMP report
suppression.
report-aggregation
By default, IGMP report
suppression is enabled.
Setting the maximum number of multicast groups on a port
You can set the maximum number of multicast groups on a port to regulate the port traffic.
Configuration restrictions and guidelines
When you set the maximum number of multicast groups on a port, follow these restrictions and
guidelines:
•
This configuration takes effect only on the multicast groups that a port joins dynamically.
•
If the number of multicast groups on a port exceeds the limit, the system removes all the
forwarding entries related to that port. The receiver hosts attached to that port can join multicast
groups again before the number of multicast groups on the port reaches the limit.
Configuration procedure
To set the maximum number of multicast groups on a port:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
interface interface-type interface-
number
N/A
3.
Set the maximum number of
multicast groups on a port.
igmp-snooping group-limit
limit
[
vlan vlan-list
]
By default, no limit is placed on
the maximum number of multicast
groups on a port.
