Enabling Igmp Report Suppression; Setting The Maximum Number Of Multicast Groups On A Port - HP MSR1002-4 Configuration Manual

MSR1002-4/1003-8S.

MSR2004-24/2004-48.

MSR954 (JH296A/JH297A/JH298A/JH299A/JH373A).

MSR958 (JH300A/JH301A).

This feature enables the device to drop all unknown multicast data. Unknown multicast data refers to
multicast data for which no forwarding entries exist in the IGMP snooping forwarding table.
If you do not enable this feature, the unknown multicast data is flooded in the VLAN to which the data
belongs.
For a VLAN enabled with this feature, the SIC-4GSW drops unknown IPv6 multicast data for the
VLAN.
To enable dropping unknown multicast data for a VLAN:
Step
1. Enter system view.
2. Enter VLAN view.
3. Enable dropping unknown
multicast data for the VLAN.

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
1. Enter system view.
2. Enter IGMP-snooping view.
3. Enable
suppression.

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:
Command
system-view
vlan vlan-id
igmp-snooping drop-unknown
Command
system-view
igmp-snooping
IGMP report
report-aggregation
28
Remarks
N/A
N/A
By default, dropping unknown
multicast data is disabled, and
unknown multicast
flooded.
Remarks
N/A
N/A
By default, IGMP
suppression is enabled.
data is
report