Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Reexamination Certificate
2004-04-08
2008-11-18
Nguyen, Chau (Department: 2619)
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
C370S351000
Reexamination Certificate
active
07453811
ABSTRACT:
Disclosed are methods and apparatus for handling Link State Packets (LSPs) sent between processing nodes within a computer network. At a first node, an LSP sent by a second node is received. The received LSP specifies connectivity information regarding the second node. It is then determined whether one of two conditions is met: either the received LSP is an updated LSP even though it appears older and a corresponding stored LSP fails authentication, or the received LSP fails authentication and it appears newer. If it is determined that one of these conditions is met, as well as purging criteria, then updating procedures are then performed on the LSP information that is maintained by the first node, where the LSP information was originally obtained from a corresponding LSP sent by the second node.
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T. Li et al., Intermediate System to Intermediate System (IS-IS) Cryptographic Authentication, Jul. 2003, The Internet Society, pp. 1 and 3.
ISO/IEC 10589 International Organization for Standardization, 1992 Copyright Office, Case Postale 56, CH-1211 Geneve 20, Switzerland.
Li, et al., “Intermediate System to Intermediate System (IS-IS) Cryptographic Authentication,” Copyright The Internet Society (2003). RFC 3567. pp. 1-6.
Luong Steven V.
Ou Heidi H.
Yang Rena W.
Zheng Xiang
Churnet Dargaye H
Cisco Technology Inc.
Nguyen Chau
Weaver Austin Villeneuve & Sampson LLP
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