H3C Technologies H3C S7500E Series Switches - Manual (Page 51)

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Configuring a Source IP Address for the IGMP Messages Sent by the Proxy
You can set the source IP addresses in the IGMP reports and leave messages sent by the IGMP
snooping proxy on behalf of its attached hosts.
Follow these steps to configure the source IP addresses for the IGMP messages sent by the
IGMP snooping proxy on behalf of its attached hosts in a VLAN:
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure a source IP address
for the IGMP reports sent by
the proxy
igmp-snooping report source-ip
{ ip-address | current-interface }
Required
The default is 0.0.0.0.
Configure a source IP address
for the IGMP leave messages
sent by the proxy
igmp-snooping leave source-ip
{ ip-address | current-interface }
The default is 0.0.0.0.
Configuring an IGMP Snooping Policy
Configuration Prerequisites
Before configuring an IGMP snooping policy, complete the following task:
z Enable IGMP snooping in the VLAN
Before configuring an IGMP snooping policy, prepare the following data:
z ACL rule for multicast group filtering
z The maximum number of multicast groups that can pass the ports
z 802.1p precedence for IGMP messages
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
configured ACL rule. If the port on which the report was received can join this multicast group,
the switch adds an entry for this port in the IGMP snooping forwarding table; 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.
Configuring a multicast group filter globally
Follow these steps to configure a multicast group filter globally: