| US 7,583,667 B2 | ||
| Automatic determination of connectivity problem locations or other network-characterizing information in a network utilizing an encapsulation protocol | ||
| Akshay Adhikari, Basking Ridge, N.J. (US); Amit Agarwal, Milpitas, Calif. (US); Lorraine Denby, Berkeley Heights, N.J. (US); Russell C. Jones, San Jose, Calif. (US); Rod D. Livingood, Cupertino, Calif. (US); Jean Meloche, Madison, N.J. (US); Anupam Rai, San Jose, Calif. (US); Wayne Sam, Verona, N.J. (US); and John R. Tuck, Jr., Berkeley Heights, N.J. (US) | ||
| Assigned to Avaya Inc., Basking Ridge, N.J. (US) | ||
| Filed on Dec. 16, 2004, as Appl. No. 11/14,546. | ||
| Claims priority of provisional application 60/554635, filed on Mar. 19, 2004. | ||
| Prior Publication US 2005/0207410 A1, Sep. 22, 2005 | ||
| Int. Cl. H04L 12/28 (2006.01); H04L 12/56 (2006.01) | ||
| U.S. Cl. 370—389 | 26 Claims |
| 1. A method for determining information characterizing a network comprising a plurality of processing elements including at
least one processing element associated with performance of a packet encapsulation operation of an encapsulation protocol,
the method comprising the steps of:
performing the packet encapsulation operation on a test packet to generate an encapsulated packet, the test packet having
a header comprising a time to live value and an identifier, wherein in conjunction with performance of the packet encapsulation
operation the time to live value and the identifier of the test packet are copied from the header of the test packet to a
header of the encapsulated packet;
transmitting the encapsulated packet;
determining if a reply packet is received responsive to transmission of the encapsulated packet; and
processing the received reply packet, if any, to obtain the information characterizing the network.
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