R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

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Configuring IGMP snooping policies
Before you configure IGMP snooping policies, complete the following tasks:
• Enable IGMP snooping for the VLAN.
• Determine the ACL used as the multicast group filter.
• Determine the maximum number of multicast groups that a port can join.
Configuring a multicast group filter
When you configure a multicast group filter, follow these guidelines:
• This configuration is effective for the multicast groups that a port dynamically joins. If you configure
the port as a static member port for a multicast group, this configuration is not effective for the
multicast group.
• You can configure a multicast filter either for the current port in proper interface view or globally for
all ports in IGMP-snooping view. If the configurations are made in both interface view and
IGMP-snooping view, the configuration made in interface view takes priority.
Configuring a multicast group filter globally
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter IGMP-snooping view.
igmp-snooping N/A
3. Configure a multicast group
filter globally.
group-policy acl-number [ vlan
vlan-list ]
By default, no multicast group filter
is configured, which means a host
can join any valid multicast group.
Configuring a multicast group filter on a port
Ste
p
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. Configure a multicast group
filter on a port.
igmp-snooping group-policy
acl-number [ vlan vlan-list ]
By default, no multicast group filter
is configured on a port, which
means the hosts on this port can
join any valid multicast group.
Enabling dropping unknown multicast data
Unknown multicast data refers to multicast data for which no forwarding entries exist in the IGMP
snooping forwarding table. When the switch receives such multicast data, one of the following occurs: