566 CHAPTER 42: IGMP SNOOPING CONFIGURATION
Before configuring an IGMP Snooping policy, prepare the following data:
■ ACL rule for multicast group filtering
■ The maximum number of multicast groups that can pass the ports
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
heard 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:
Configuring a multicast group filter on a port or a group of ports
Follow these steps to configuring a multicast group filter on a port or a group of
ports:
Configuring Multicast
Source Port Filtering
With the multicast source port filtering feature enabled on a port, the port can be
connected with multicast receivers only rather than with multicast sources,
because the port will block all multicast data packets while it permits multicast
protocol packets to pass.
To do… Use the command… Remarks
Enter system view system-view -
Enter IGMP Snooping view igmp-snooping -
Configure a multicast group
filter
group-policy acl-number
[ vlan vlan-list ]
Required
No group filter is configured
by default, namely hosts can
join any multicast group.
To do… Use the command… Remarks
Enter system view system-view -
Enter the
corresponding view
Enter Ethernet port
view
interface interface-type
interface-number
Use either command
Enter port group
view
port-group { manual
port-group-name |
aggregation agg-id }
Configure a multicast group filter igmp-snooping
group-policy
acl-number [ vlan
vlan-list ]
Required
No filter is configured
by default, namely
hosts can join any
multicast group.
To Next Page
Loading...
