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Method for encapsulating and transmitting a message includes private and forwarding network addresses with payload to an end of a tunneling association

  • US 6,523,068 B1
  • Filed: 08/27/1999
  • Issued: 02/18/2003
  • Est. Priority Date: 08/27/1999
  • Status: Expired due to Term
First Claim
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1. In a data network having a plurality of private networks and public networks, and a plurality of network devices, a method for processing a media flow at an end of a tunneling association through a network device, the method comprising the following steps:

  • receiving a first message on the network device on a public network associated with a first layer of a protocol stack for the network device, wherein the first message includes a first payload;

    determining whether the first message includes an indicator that the first payload is associated with a second layer of the protocol stack, and if so, obtaining a private network address from the first payload in the second layer of the protocol stack, wherein the first payload includes the private network address and a second payload, determining whether the private network address is recorded on the network device, and if so, associating a forwarding network address with the private network address, wherein the forwarding network address is associated with a third layer of the protocol stack and is associated with the end of the tunneling association, and requesting the third layer to encapsulate and transmit a second message to the end of the tunneling association, wherein the second message includes the forwarding network address and the second payload.

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