IGMP SSM mapping allows IGMPv1 and IGMPv2 group members to access the SSM network if a multicast source is manually bound to a multicast group. Which of the following statements are true about IGMP SSM mapping?
A.
IGMP SSM mapping converts (*, G) information in IGMPv1 and IGMPv2 Report messages to (S, G) information according to static SSM mapping entries configured on a multicast switch.
B.
IGMP SSM mapping does not apply to IGMPv3 Report messages. To provide SSM service to hosts running any IGMP version on a network segment, IGMPv3 must be enabled on the multicast router ' s interface that is connected to the network segment.
C.
The SSM group address ranges from 232.0.0.0 to 232.255.255.255.
D.
If IGMP SSM mapping is disabled, IGMPv1 and IGMPv2 do not support multicast deployment in SSM mode.
Source-Specific Multicast (SSM) uses (S, G) addressing instead of the traditional (*, G) used in Any-Source Multicast (ASM) .
IGMP SSM Mapping is used to enable IGMPv1 and IGMPv2 hosts (which do not support explicit source selection) to work in an SSM environment by mapping (*, G) to (S, G) .
A. TRUE → The mapping allows IGMPv1/v2 to function in an SSM network .
B. TRUE → IGMPv3 natively supports SSM , so SSM mapping is not needed for IGMPv3 .
C. FALSE → The SSM address range is 232.0.0.0/8 in IPv4 , but this is not the only range used for SSM globally .
D. TRUE → If IGMP SSM mapping is disabled, IGMPv1/v2 cannot work in an SSM network because they do not support explicit source selection .
???? Reference: Huawei HCIA-Datacom Study Guide, IGMP Versions and SSM Mapping.
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