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Ethernet encapsulation over optical transport network

  • US 7,684,419 B2
  • Filed: 04/19/2005
  • Issued: 03/23/2010
  • Est. Priority Date: 04/19/2005
  • Status: Active Grant
First Claim
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1. A method for encapsulating a packet for transport over an optical transport network, the method comprising:

  • receiving a Gigabit Ethernet packet at a network device;

    encapsulating said packet, said encapsulating comprising;

    replacing a preamble and a start of frame delimiter in said received Ethernet packet with overhead comprising a field configured to identify a client signal fail and a channel ID, wherein said overhead comprises a fewer number of bytes than the number of bytes removed from said packet, wherein replacing comprises removing eight bytes and inserting four bytes into said packet; and

    transporting said packet over the optical transport network;

    whereby said packet is received from a network having a line frequency different than a payload frequency of the optical transport network and said encapsulated packet is configured for transport directly over the optical transport network without modification to compensate for the different frequencies.

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