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IP SANs: A Guide to iSCSI, iFCP, and FCIP Protocols for Storage Area Networks by Tom Clark

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11.5. Resource Reservation Protocol

RSVP is an implementation of Internet integrated services (RFC 1633) and uses a different QoS strategy in comparison with DiffServs. As originally defined in the RFC 2205 standards draft, RSVP may be used to establish QoS levels for application data streams or flows through the network. A data flow is a stream of packets originating from a single IP address/TCP port number and one or more fixed (for the duration of the flow) destination IP address/TCP port numbers. A digital video multicast, for example, would have a single point of origin with multiple concurrent destinations. Unicast single source and single destination are also supported. The purpose of RSVP is to establish and maintain reserved bandwidth ...

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