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公开(公告)号：US07801135B2
公开(公告)日：2010-09-21
申请号：US11134686
申请日：2005-05-19
IPC分类号： H04L12/56
CPC分类号： H04L69/16 , H04L45/121 , H04L69/14 , H04L69/161 , H04L69/163 , H04L69/326
摘要： A system and method supporting synchronization of replicated transport layer connections in a redundant processor telecommunications network element. One method involves receiving, at a network element comprising an active transport protocol process coupled to a standby transport protocol process, information identifying a newly created transport layer connection maintained at the active transport protocol process; assigning a unique connection identifier to the transport layer connection; sending the unique connection identifier, in association with other, protocol-specific connection identifying information, to the standby protocol process; and sending, to the standby transport protocol process, one or more messages comprising one or more properties or statistics associated with the transport layer connection, wherein the messages identify the transport layer connection using the unique connection identifier.
摘要翻译： 支持冗余处理器电信网络元件中复制传输层连接同步的系统和方法。 一种方法包括在包括与备用传输协议过程相关联的活动传输协议进程的网络元件处接收标识在活动传输协议过程中维护的新创建的传输层连接的信息; 向传输层连接分配唯一的连接标识符; 将与所述协议特定连接识别信息相关联的唯一连接标识符发送到所述备用协议进程; 以及向所述备用传输协议进程发送包括与所述传输层连接相关联的一个或多个属性或统计信息的一个或多个消息，其中所述消息使用所述唯一连接标识符标识所述传输层连接。
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公开(公告)号：US20060268710A1
公开(公告)日：2006-11-30
申请号：US11133622
申请日：2005-05-19
IPC分类号： H04J1/16
CPC分类号： H04L69/16 , H04L69/163 , Y10S707/99953 , Y10S707/99955
摘要： A method detects a change in TCP receive window size while preventing fragmentation of data. A TCP stack receives a segment that advertises a receive window size of zero. If data needs to be sent, and only if so, a timer is started. When the timer expires, a TCP segment that contains a first sequence number value equal to second sequence number representing sent but unacknowledged data minus one, and a segment length value of zero, is sent. Without sending a fragment of data, this triggers a peer TCP process to send an updated window size. A TCP ACK segment is received and contains an updated receive window size. If the updated receive window size is greater than a specified value, then the data is sent. Otherwise, a counter is incremented, and the steps are re-performed if the counter is less than a specified value.
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公开(公告)号：US20060262716A1
公开(公告)日：2006-11-23
申请号：US11134678
申请日：2005-05-19
CPC分类号： H04L41/0668 , H04L69/16 , H04L69/40
摘要： A system and method supporting efficient, scalable stateful switchover of transport layer connections in a telecommunications network element. One method involves receiving, at a network element comprising an active transport protocol process coupled to a standby protocol process, a request to configure a first transport layer connection maintained at the active transport protocol process for stateful switchover; receiving an event associated with the first transport layer connection; creating a message containing replicated event information based on the received event; sending the message to the standby transport protocol process; and processing the message at the standby transport protocol process, wherein the standby transport protocol process replicates state information for the first connection.
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公开(公告)号：US20060062142A1
公开(公告)日：2006-03-23
申请号：US10948732
申请日：2004-09-22
IPC分类号： H04L1/00
CPC分类号： H04L47/27 , H04L45/04 , H04L45/586 , H04L69/40
摘要： A system and method for performing stateful switchover with reduced data, such as only metadata about a TCP window state. The metadata comprises a size of TCP packets used to send BGP messages, and which of those have been acknowledged by a neighbor networking device. The networking device comprises a BGP module to establish a BGP session between the networking device and a neighbor networking device. An active transport module within the networking device synchronizes with a standby transport module within the networking device by sending the metadata. A fault detector within the networking device initiates a stateful switchover from the active transport module to the standby transport module responsive to detecting a failure of a process and/or processor. The standby transport module uses the metadata to determine stateful metadata for preserving current BGP and TCP sessions of the networking device with dummy TCP packets having the same size ad sent TCP packets and containing safe BGP message data.
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公开(公告)号：US08537660B2
公开(公告)日：2013-09-17
申请号：US12830948
申请日：2010-07-06
CPC分类号： H04L41/0668 , H04L69/16 , H04L69/40
摘要： A system and method supporting efficient, scalable stateful switchover of transport layer connections in a telecommunications network element. One method involves receiving, at a network element comprising an active transport protocol process coupled to a standby protocol process, a request to configure a first transport layer connection maintained at the active transport protocol process for stateful switchover; receiving an event associated with the first transport layer connection; creating a message containing replicated event information based on the received event; sending the message to the standby transport protocol process; and processing the message at the standby transport protocol process, wherein the standby transport protocol process replicates state information for the first connection.
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公开(公告)号：US07957268B2
公开(公告)日：2011-06-07
申请号：US12418913
申请日：2009-04-06
IPC分类号： H04L12/26
CPC分类号： H04L47/27 , H04L45/04 , H04L45/586 , H04L69/40
摘要： A system and method for performing stateful switchover with reduced data, such as only metadata about a TCP window state. The metadata comprises a size of TCP packets used to send BGP messages, and which of those have been acknowledged by a neighbor networking device. The networking device comprises a BGP module to establish a BGP session between the networking device and a neighbor networking device. An active transport module within the networking device synchronizes with a standby transport module within the networking device by sending the metadata. A fault detector within the networking device initiates a stateful switchover from the active transport module to the standby transport module responsive to detecting a failure of a process and/or processor. The standby transport module uses the metadata to determine stateful metadata for preserving current BGP and TCP sessions of the networking device.
摘要翻译： 一种用简单数据进行状态切换的系统和方法，例如仅关于TCP窗口状态的元数据。 元数据包括用于发送BGP消息的TCP数据包的大小，以及哪些哪些已被邻居网络设备确认。 网络设备包括BGP模块，用于在组网设备和邻居网络设备之间建立BGP会话。 网络设备内的主动传输模块通过发送元数据与网络设备内的备用传输模块进行同步。 响应于检测到过程和/或处理器的故障，网络设备内的故障检测器启动从主动传输模块到备用传输模块的状态切换。 备用传输模块使用元数据来确定用于保留网络设备的当前BGP和TCP会话的状态元数据。
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公开(公告)号：US07609617B2
公开(公告)日：2009-10-27
申请号：US11108053
申请日：2005-04-14
CPC分类号： H04L45/586 , G06F8/656 , H04L45/04 , H04L45/563
摘要： A method is disclosed for upgrading network protocol software, comprising receiving a new version of Border Gateway Protocol (BGP) software on a standby route processor that is coupled to an active route processor in a redundant arrangement; transferring, from the active route processor to the standby route processor, one or more transport protocol connections that are associated with one or more active BGP sessions of the active route processor; transferring, from the active route processor to the standby route processor, BGP session information representing the active BGP sessions; progressively shutting down an active BGP process of the active route processor; and switching control of BGP data processing to the standby route processor. The route processors may be placed in a stateful switchover mode of operation temporarily only during the transferring, shutting down, and switching. Thus a hitless BGP upgrade approach is provided.
摘要翻译： 公开了一种用于升级网络协议软件的方法，包括在冗余布置中耦合到主动路由处理器的备用路由处理器上接收新版本的边界网关协议（BGP）软件; 从所述活动路由处理器向所述备用路由处理器传送与所述活动路由处理器的一个或多个活动BGP会话相关联的一个或多个传输协议连接; 从活动路由处理器向备用路由处理器传送表示活动BGP会话的BGP会话信息; 逐步关闭主动路由处理器的主动BGP进程; 并将BGP数据处理切换到备用路由处理器。 路由处理器可以暂时处于状态切换操作模式，仅在传输，关闭和切换期间。 因此，提供了无限的BGP升级方法。
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公开(公告)号：US20090219805A1
公开(公告)日：2009-09-03
申请号：US12418913
申请日：2009-04-06
IPC分类号： G06F11/00
CPC分类号： H04L47/27 , H04L45/04 , H04L45/586 , H04L69/40
摘要： A system and method for performing stateful switchover with reduced data, such as only metadata about a TCP window state. The metadata comprises a size of TCP packets used to send BGP messages, and which of those have been acknowledged by a neighbor networking device. The networking device comprises a BGP module to establish a BGP session between the networking device and a neighbor networking device. An active transport module within the networking device synchronizes with a standby transport module within the networking device by sending the metadata. A fault detector within the networking device initiates a stateful switchover from the active transport module to the standby transport module responsive to detecting a failure of a process and/or processor. The standby transport module uses the metadata to determine stateful metadata for preserving current BGP and TCP sessions of the networking device.
摘要翻译： 一种用简单数据进行状态切换的系统和方法，例如仅关于TCP窗口状态的元数据。 元数据包括用于发送BGP消息的TCP数据包的大小，以及哪些哪些已被邻居网络设备确认。 网络设备包括BGP模块，用于在组网设备和邻居网络设备之间建立BGP会话。 网络设备内的主动传输模块通过发送元数据与网络设备内的备用传输模块进行同步。 响应于检测到过程和/或处理器的故障，网络设备内的故障检测器启动从主动传输模块到备用传输模块的状态切换。 备用传输模块使用元数据来确定用于保留网络设备的当前BGP和TCP会话的状态元数据。
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公开(公告)号：US07545810B2
公开(公告)日：2009-06-09
申请号：US11173690
申请日：2005-07-01
CPC分类号： H04L63/123 , H04L9/0891 , H04L9/3239 , H04L9/3247 , H04L2209/38 , H04L2209/80
摘要： Approaches are disclosed for switching transport protocol connection keys. In a transport protocol module configured to use a first key for signing messages associated with a transport protocol connection, a second key is configured for the transport protocol connection. A first message that is associated with the transport protocol connection is received. The first message includes a first signature. A first and a second message digests are computed for the first message, where the first message digest is based on the first key and the second message digest is based on the second key. The first message is validated if the first signature in the first message matches any one of the first message digest and the second message digest.
摘要翻译： 公开了用于切换传输协议连接密钥的方法。 在被配置为使用第一密钥来签署与传输协议连接相关联的消息的传输协议模块中，为传输协议连接配置第二密钥。 接收与传输协议连接相关联的第一消息。 第一个消息包括第一个签名。 针对第一消息计算第一和第二消息摘要，其中第一消息摘要基于第一密钥，第二消息摘要基于第二密钥。 如果第一消息中的第一个签名与第一个消息摘要和第二个消息摘要中的任何一个匹配，则验证第一个消息。
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公开(公告)号：US20070160063A1
公开(公告)日：2007-07-12
申请号：US11329509
申请日：2006-01-10
IPC分类号： H04L12/56
CPC分类号： H04L63/068 , H04L69/16 , H04L69/163
摘要： Approaches are disclosed for switching transport protocol connection keys. A first node sends a keychange request message to a second node, causing the second node to accept subsequent messages digitally signed with a first or second key. The second node sends an acknowledgment message to the first node, causing the first node to accept subsequent messages digitally signed with the first or second key. The first node receives a new message digitally signed with the second key from the second node and determines that there are no remaining messages to be received digitally signed with the first key. In response thereto, the first node only accepts messages digitally signed with the second key and sends a message signed with the second key to the second node, causing the second node to only accept messages digitally signed with the second key.
摘要翻译： 公开了用于切换传输协议连接密钥的方法。 第一节点向第二节点发送密钥交换请求消息，导致第二节点接受用第一或第二密钥数字签名的后续消息。 第二节点向第一节点发送确认消息，使得第一节点接受用第一或第二密钥数字签名的后续消息。 第一节点从第二节点接收用第二密钥数字签名的新消息，并确定不存在要用第一密钥数字签名的剩余消息。 响应于此，第一节点仅接受用第二密钥数字签名的消息，并将具有第二密钥签名的消息发送到第二节点，使得第二节点仅接受用第二密钥数字签名的消息。
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