Configuring A Multicast Group Filter - H3C s3100-52P Operation Manual

Operation Manual – Multicast
H3C S3100-52P Ethernet Switch
Note:
The fast leave processing function works for a port only if the host attached to the
port runs IGMPv2 or IGMPv3.
The configuration performed in system view takes effect on all ports of the switch if
no VLAN is specified; if one or more VLANs are specified, the configuration takes
effect on all ports in the specified VLAN(s).
The configuration performed in Ethernet port view takes effect on the port no matter
which VLAN it belongs to if no VLAN is specified; if one or more VLANs are specified,
the configuration takes effect on the port only if the port belongs to the specified
VLAN(s).
If fast leave processing and unknown multicast packet dropping or non-flooding are
enabled on a port to which more than one host is connected, when one host leaves
a multicast group, the other hosts connected to port and interested in the same
multicast group will fail to receive multicast data for that group.

3.2.5 Configuring a Multicast Group Filter

On an IGMP Snooping-enabled switch, the configuration of a multicast group allows the
service provider to define restrictions on multicast programs available to different users.
In an actual application, when a user requests a multicast program, the user's host
initiates an IGMP report. Upon receiving this report message, the switch checks the
report against the ACL rule configured on the receiving port. If the receiving port can
join this multicast group, the switch adds this port to the IGMP Snooping multicast
group list; otherwise the switch drops this report message. Any multicast data that has
failed the ACL check will not be sent to this port. In this way, the service provider can
control the VOD programs provided for multicast users.
Make sure that an ACL rule has been configured before configuring this feature.
I. Configuring a multicast group filter in system view
Follow these steps to configure a multicast group filter in system view:
Enter system view
Configure a multicast
group filter
To do...
system-view
igmp-snooping
group-policy acl-number
[ vlan vlan-list ]
Chapter 3 IGMP Snooping Configuration
Use the command...
3-9
Remarks
—
Required
No group filter is
configured by default,
namely hosts can join any
multicast group.