A network includes a mix of IGMPv2 and IGMPv3 endpoints and must support the following
source specific multicasting applications:
* Source: 10.1.4.2 and Group: 232.0.5.5
* Source: 10.1.4.12 and Group 232.0.6.6
The network is already implementing PIM-SM and IGMPv3. In order to support these applications,
the HP 10500 switches that act as routers for the endpoints in question must support another
feature. Which step must the network administrator perform on each of these switches?

A.
Create an SSM policy that includes 232.0.5.5 and 232.0.6.6 within its range

B.
Enable IGMPv2 backward compatibility mode

C.
Configure two SSM maps, each of which maps a source to its multicast group

D.
Enable PIM SSM on the interfaces that connect to the endpoints

Explanation:
When both SSM mapping and IGMPv3 are enabled, the router will send out IGMPv3
membership query messages instead of IGMPv3 membership messages. If the receiver hosts that
are to be supported with SSM mapping can only support IGMPv1 or IGMPv2, then enabling SSM
mapping on an interface with IGMPv3 is fine. IGMPv3 membership query messages will be
interpreted as IGMPv1 or IGMPv2 queries and the host will continue to report with IGMPv1 or
IGMPv2 reports.
Note:
SSM Components
SSM is a datagram delivery model that best supports one-to-many applications, also known as
broadcast applications. SSM is a core networking technology for the implementation of IP
multicast solutions targeted for audio and video broadcast application environments and is

described in RFC 3569. The following two components together support the implementation of
SSM:
*Protocol Independent Multicast source-specific mode (PIM-SSM)
* Internet Group Management Protocol Version 3 (IGMPv3)
PIM-SSM is the routing protocol that supports the implementation of SSM and is derived from PIM
sparse mode (PIM-SM). IGMP is the Internet Engineering Task Force (IETF) standards track
protocol used for hosts to signal multicast group membership to routers. IGMPv3 supports source
filtering, which is required for SSM. For SSM to run with IGMPv3, SSM must be supported in the
Cisco IOS router, the host where the application is running, and the application itself.