Ssm Ip Address Range - Cisco 3032 Software Configuration Manual

Chapter 44 Configuring IP Multicast Routing

SSM IP Address Range

SSM can coexist with the ISM service by applying the SSM delivery model to a configured subset of the
IP multicast group address range. Cisco IOS software allows SSM configuration for the IP multicast
address range of 224.0.0.0 through 239.255.255.255. When an SSM range is defined, existing IP
multicast receiver applications do not receive any traffic when they try to use an address in the SSM
range (unless the application is modified to use an explicit (S, G) channel subscription).
SSM Operations
An established network, in which IP multicast service is based on PIM-SM, can support SSM services.
SSM can also be deployed alone in a network without the full range of protocols that are required for
interdomain PIM-SM (for example, MSDP, Auto-RP, or bootstrap router [BSR]) if only SSM service is
needed.
If SSM is deployed in a network already configured for PIM-SM, only the last-hop routers support SSM.
Routers that are not directly connected to receivers do not require support for SSM. In general, these
not-last-hop routers must only run PIM-SM in the SSM range and might need additional access control
configuration to suppress MSDP signalling, registering, or PIM-SM shared tree operations from
occurring within the SSM range.
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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Configuring IP Multicast Routing
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