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DES-7200 Configuration Guide Chapter 3 IGMP
Configuration
3-5
3.2.2 Enabling IGMP
Use the following command in the interface configuration mode to enable IGMP:
Command Purpose
DES-7200 (config-if) # ip pim
{sparse-mode | dense-mode}
Enable the multicast routing protocol and
IGMP.
DES-7200 (config-if) # no ip pim
{sparse-mode | dense-mode}
Disable the multicast routing protocol and
IGMP.
Note
Enabling a multicast routing protocol and the multicast routing forwarding
function on an interface will enable IGMP.
A device can run only one kind of multicast routing protocol.
3.2.3 Configuring IGMP Version
Use the following command in the interface configuration mode to configure the
IGMP version.
Command Purpose
DES-7200 (config-if) # ip igmp
version{1 | 2 | 3}
Configure the IGMP version, version 2 by
default.
DES-7200 (config-if) # no ip igmp
version
Restore to the default value.
3.2.4 Configuring Query Interval of Last Member
After receiving the message of leaving the multicast group, the querier sends the
specific membership query to verify whether there is any member in the group. If
no report is received during the last member query interval period, the querier will
regard the host that is leaving the group is the last member of that group, and
then delete the information of the group. By default the period is 1 s.
Use the following commands in the interface configure mode to configure the
query interval of last member:
Command Function
DES-7200 (config-if) # ip igmp
last-member-query-interval interval
Configure the query interval of the last
member.
interval: in the range 1 to 255 in 0.1s.
DES-7200 (config-if) # no ip igmp
last-member-query-interval interval
Restore to the default value.
3.2.5 Configuring Query Count of Last Member
After receiving the message of leaving the multicast group, the querier device
sends the specific membership query for several times to verify whether there is
any member in the group. The query times should be larger than 1.
Use the following command in the interface configuration mode to configure the
query count of last member:
Command Function