Chapter 24: IP Video
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 754
Valid Multicast Address Ranges
The following multicast addresses are supported by the C4/c CMTS:
SSM ranges 232.0.0.1 to 232.255.255.255 and 239.0.0.0 to 239.255.255.255
ASM ranges 224.0.1.0 to 231.255.255.255 and 239.0.0.0 to 239.255.255.255
Additional information is provided in Multicast.
ASM Architecture
The C4/c CMTS provides multicast capabilities including support for forwarding multicast traffic to hosts that have
dynamically joined an IP multicast group at address G from any multicast source. The notation used to describe this is
(*,G). This is known as Any Source Multicast (ASM). On the C4/c CMTS, ASM is supported on the network-side interface via
the IGMPv2 or IGMPv3 host protocol and IGMP proxy with IGMPv3 router/querier configured on the cable-side interface.
The control protocol, IGMP, allows hosts to dynamically join an IP multicast group.
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