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DES-7200 Configuration Guide Chapter 8 IGMP Snooping
Configuration
8-17
8.2.12.2 Configuring Source IP Check
Source IP check corresponds to two commands: 1) configuration of default
source IP address of valid multicast traffic for all multicast groups; 2) configuration
of the source IP address of valid multicast traffic for a specific multicast group
belonging to specific VLAN. The source IP address of valid multicast server can
only be configured for a specific group after enabling default source IP check of all
groups.
In global configuration mode, execute the following steps to enable IGMP
Snooping source IP check:
Command Function
DES-7200(config)# ip igmp snooping
source-check default-server address
Enable source IP check and configure the
default source IP address of valid multicast
traffic for all groups. This feature is disabled
by default.
DES-7200(config)# no ip igmp
snooping source-check default-server
Disable source IP check.
DES-7200(config)# ip igmp snooping
limit-ipmc vlan vid address address
server address
Configure the source IP address of valid
multicast traffic for specific group address.
By default, the source IP address of the
valid multicast traffic for this group address
is the same as the IP address of
default-server.
DES-7200(config)# no ip igmp
snooping limit-ipmc vlan vid address
address
Remove the configuration of limit-ipmc.
The following example shows how to enable source IP check and configure the
default source IP to 1.1.1.1, and how to configure the source IP address of valid
multicast traffic for group 233.3.3.3 belonging to VLAN1 to 1.1.1.2.
DES-7200# configure terminal
DES-7200(config)# ip igmp snooping source-check default-server 1.1.1.1
DES-7200(config)# ip igmp snooping limit-ipmc vlan 1 address 233.3.3.3 server
1.1.1.2
Caution
IGMP Snooping source IP check cannot be shared with layer-3 multicasting,
which means layer-3 multicast forwarding will be compromised after enabling
layer-3 multicasting and source IP check at the same time.
8.2.12.3 Configuring Port Filter
Under certain circumstances, you may need to control a specific port to only
receive a group of specific multicast traffic and control the maximum number of
groups that can be joined on this port. IGMP Filtering well meets such needs.
You can apply an IMGP Profile to a port. If IMGP Report packets are received on
the port, the layer-2 multicast device will verify whether the multicast address to
be joined by this port falls within the range permitted by IGMP Profile. If yes, the
port will join and process subsequently.
You can also configure the maximum number of groups that can be joined by the
port. If the threshold is exceeded, the layer-2 multicast device will no longer
receive and process IGMP Report packets.
In global configuration mode, execute the following steps to configure IGMP
Filtering: