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Quality of service facility in a device for performing IP forwarding and ATM switching

  • US 6,611,522 B1
  • Filed: 06/18/1999
  • Issued: 08/26/2003
  • Est. Priority Date: 06/19/1998
  • Status: Expired due to Term
First Claim
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1. A facility for providing Asynchronous Transfer Mode (ATM) and Internet Protocol (IP) Quality of Service (QoS) features in a digital communication node, said facility comprising:

  • a plurality of logical input ports adapted for receiving input data flows from external data sources and a plurality of logical output ports adapted for transmitting output data flows to a plurality of external data destinations, wherein said input data flows and said output data flows include a plurality of ATM data cells and a plurality of IP data packets;

    ATM forwarding means for forwarding ATM data cells from one of said logical input ports toward at least one of said logical output ports along a selected forwarding path;

    IP forwarding means for forwarding IP data packets from one of said logical input ports toward at least one of said logical output ports along a selected forwarding path;

    QoS elements for identifying one or more ATM QoS features for ATM data cells in the input data flows, identifying one or more IP QoS features for IP data packets in the input data flows, and scheduling forwarding of said input data flows, based at least in part, on the identified one or more ATM QoS features and on the identified one or more IP QoS features; and

    a housing that contains both said ATM forwarding means and said IP forwarding means.

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