Method and apparatus for detecting support for a protocol defining supplemental headers
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United States of America Patent
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Nov 15, 2011
Grant Date -
Apr 2, 2009
app pub date -
Jul 31, 2008
filing date -
Jun 30, 2004
priority date (Note) -
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Abstract
Various methods and systems for detecting whether a network device supports a protocol, which defines a supplemental header, are disclosed. One method involves detecting a value within a preamble generated by a sending device and verifying that a header format of a header, also generated by the sending device, conforms to a header format definition of a protocol. The header format definition of the protocol defines a supplemental header. The preamble can be an Ethernet preamble. In one embodiment, the preamble is a converged data link (CDL) preamble or other type of preamble that is used to convey operation, administration and management (OAM) information.
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