| US 7,406,029 B1 | ||
| Fault tolerant optical data communication network having auto discovery | ||
| Gene Ciancaglini, Dover, N.H. (US); Michael Garofalo, Portsmouth, N.H. (US); James Hart, Rochester, N.H. (US); Steven Lumetta, Champaign, Ill. (US); Muriel Medard, Cambridge, Mass. (US); John D. Moores, Groton, Conn. (US); Salil A. Parikh, Belmont, Mass. (US); Mark R. Parquette, East Kingston, N.H. (US); William Proulx, Sanbornville, N.H. (US); and Michael Rydeen, Portsmouth, N.H. (US) | ||
| Assigned to NetApp, Inc., Sunnyvale, Calif. (US) | ||
| Filed on Jun. 27, 2002, as Appl. No. 10/186,302. | ||
| Claims priority of provisional application 60/301669, filed on Jun. 28, 2001. | ||
| Int. Cl. G01R 31/08 (2006.01) | ||
| U.S. Cl. 370—216 [370/242; 370/404] | 30 Claims |
| 1. A method comprising:
sending a first broadcast message by a headend interconnected to a plurality of discovered nodes and a first undiscovered
node;
receiving discovered node reply messages from the discovered nodes in response to the first broadcast message;
receiving a first undiscovered node message from the first undiscovered node in response to the first broadcast message; and
determining a distance of the first undiscovered node from the headend, wherein said determining a distance of the first undiscovered
node from the headend comprises sending a ranging command message from the headend to the first undiscovered node.
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