The Session Resource Manager is a key element of DSM-CC and a single point of failure. What kind of back-up precautions can be taken on the SRM to secure safe operation of the system?
In the DSM-CC IS specification SRM is identified as a set of functions covering Session and Resource Management and User configuration. The DSM-CC IS also specifies interfaces between the Client and the Server to the SRM and uses the Specification and Description Language (SDL) to provide an exhaustive representation of their use, including exception cases. The realization of the SRM functions is left to a particular vendor or implementers group. For example assuming that the SRM functions are implemented through SRM nodes, it is possible to reroute traffic from a node which has failed to another node with a minimum impact on the service.
