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DES-7200 Configuration Guide Chapter 3 IGMP
Configuration
3-4
groups. It can carry with one or more group records, each record with group
address and source address list. Below shows the types of group record:
IS_IN: Indicates INCLUDE filtering mode between the multicast group and the
multicast source list, that is, only the multicast traffic from the specific multicast
source list to the multicast group are received. A null multicast source list means
leaving the multicast group, which is equivalent to the leave message in IGMPv2.
IS_EX: Indicates EXCLUDE filtering mode between the multicast group and the
multicast source list, that is, only the multicast traffic from any multicast source
except for the specific multicast source list to the multicast group are received.
TO_IN: Indicates that the filtering mode between the multicast group and the
multicast source list changes from EXCLUDE to INCLUDE.
TO_EX: Indicates that the filtering mode between the multicast group and the
multicast source list changes from INCLUDE to EXCLUDE.
ALLOW: Indicates receiving multicast traffic from additional multicast sources.
For INCLUDE mode, it adds these multicast source to the multicast source list.
For EXCLUDE mode, it removes these multicast sources from the multicast
source list.
BLOCK: Indicates no longer receiving multicast traffic from some multicast
sources. For INCLUDE mode, it removes these multicast source from the
multicast source list. For EXCLUDE mode, it adds these multicast sources to the
multicast source list.
For the sake of compatibility, IGMPv3 can identify IGMPv1/v2 packets.
Caution
For the specific group on the DES-7200’s switching router multicast layer3
interface, up to 1017 specific sources with unicast-allowed by users can be
configured.
For the specific group on the DES-7200’s switching router multicast layer3
interface, up to 1017 specific sources without the unicast-allowed by users can
be filtered.
3.2 IGMP Configuration Task
IGMP configuration includes the following tasks. Only some configuration tasks
are mandatory, others are optional. It should be noted that the following
commands should be executed on the Layer 3 interface.
3.2.1 Default IGMP Configuration
IGMP version IGMPv2 is supported on all interfaces.
Query response time 10s
Query interval 125s
Access to multicast group All multicast groups
Other querier timer 255s
Robustibility variables 2
Query interval of last member 1s
Query count of last member 2
IGMP status Disabled