Enabling Dropping Unknown Multicast Data - HP FlexNetwork 7500 Series Configuration Manual

Enable multicast source port
3.
filtering.

Enabling dropping unknown multicast data

This feature enables the switch 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.
Configuration restrictions and guidelines
When you enable dropping unknown multicast data, follow these restrictions and guidelines:
•
You can enable this feature globally for all VLANs in IGMP-snooping view or for a VLAN in
VLAN view.
•
The drop-unknown command in IGMP-snooping view and the igmp-snooping
drop-unknown command in VLAN view are mutually exclusive. You cannot configure them on
the same switch.
•
If you enable dropping unknown IPv6 and IPv4 multicast data, enable both of them globally or
for the same VLANs to ensure correct multicast forwarding. For more information about
enabling dropping unknown IPv6 multicast data, see
•
When dropping unknown multicast data is enabled, the switch still forwards unknown multicast
data to other router ports in the VLAN.
Enabling dropping unknown multicast data globally
Step
Enter system view.
1.
Enter IGMP-snooping view.
2.
Enable dropping unknown
3.
multicast data globally.
Enabling dropping unknown multicast data in a VLAN
Step
Enter system view.
1.
Enter VLAN view.
2.
Enable dropping unknown
3.
multicast data for the VLAN.
Enabling IGMP report suppression
This feature enables the switch 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. This reduces the multicast traffic.
To enable IGMP report suppression:
igmp-snooping source-deny
Command
system-view
igmp-snooping
drop-unknown
Command
system-view
vlan vlan-id
igmp-snooping drop-unknown
27
By default, multicast source port
filtering is disabled.
"Configuring MLD snooping."
Remarks
N/A
N/A
By default, dropping unknown
multicast data is disabled.
Unknown multicast data is
flooded in the VLAN to which the
data belongs.
Remarks
N/A
N/A
By default, dropping unknown
multicast data is disabled.
Unknown multicast data is
flooded in the VLAN to which the
data belongs.