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公开(公告)号：US20100238788A1
公开(公告)日：2010-09-23
申请号：US12383360
申请日：2009-03-23
申请人： Sami Boutros , Muthurajah Sivabalan , David D. Ward , George Swallow , Stewart Bryant , Ian Michael Charles Shand
发明人： Sami Boutros , Muthurajah Sivabalan , David D. Ward , George Swallow , Stewart Bryant , Ian Michael Charles Shand
CPC分类号： H04L12/2419 , H04L41/06 , H04L43/0811 , H04L45/26 , H04L45/28 , H04L45/50 , H04L47/10
摘要： In one embodiment, a connection verification (CV) message is initiated from an initiating maintenance end point (MEP) for an MPLS LSP, the CV message carried in a packet having a time-to-live (TTL) value of 1. Each maintenance intermediate point (MIP) along the MPLS LSP receives the packet and decrements the TTL, and in response to determining that the TTL equals 0, examines a payload of the packet to determine that the packet carries the CV message. The MIP may then append its MIP ID to a route record field of the payload having any previous MIP IDs of upstream MIPs, and forwards the CV message downstream along the MPLS LSP in a packet having a TTL value of 1. The end MEP receives the CV message, and sends a CV reply having the route record field with MIP IDs and an end MEP ID to the initiating MEP.
摘要翻译： 在一个实施例中，从针对MPLS LSP的发起维护端点（MEP）发起连接验证（CV）消息，在具有生存时间（TTL）值为1的分组中携带的CV消息。每个维护 沿着MPLS LSP的中间点（MIP）接收分组并递减TTL，并且响应于确定TTL等于0，检查分组的有效载荷以确定分组携带CV消息。 然后，MIP可以将其MIP ID附加到具有上游MIP的任何先前MIP ID的有效载荷的路由记录字段，并且在TTL值为1的分组中沿着MPLS LSP向下游转发CV消息。终端MEP接收 CV消息，并将具有MIP ID和终结MEP ID的路由记录字段的CV回复发送到初始MEP。
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公开(公告)号：US08374095B2
公开(公告)日：2013-02-12
申请号：US12383360
申请日：2009-03-23
申请人： Sami Boutros , Muthurajah Sivabalan , David D. Ward , George Swallow , Stewart Bryant , Ian Michael Charles Shand
发明人： Sami Boutros , Muthurajah Sivabalan , David D. Ward , George Swallow , Stewart Bryant , Ian Michael Charles Shand
IPC分类号： H04J1/16
CPC分类号： H04L12/2419 , H04L41/06 , H04L43/0811 , H04L45/26 , H04L45/28 , H04L45/50 , H04L47/10
摘要： In one embodiment, a connection verification (CV) message is initiated from an initiating maintenance end point (MEP) for an MPLS LSP, the CV message carried in a packet having a time-to-live (TTL) value of 1. Each maintenance intermediate point (MIP) along the MPLS LSP receives the packet and decrements the TTL, and in response to determining that the TTL equals 0, examines a payload of the packet to determine that the packet carries the CV message. The MIP may then append its MIP ID to a route record field of the payload having any previous MIP IDs of upstream MIPs, and forwards the CV message downstream along the MPLS LSP in a packet having a TTL value of 1. The end MEP receives the CV message, and sends a CV reply having the route record field with MIP IDs and an end MEP ID to the initiating MEP.
摘要翻译： 在一个实施例中，从针对MPLS LSP的发起维护端点（MEP）发起连接验证（CV）消息，在具有生存时间（TTL）值为1的分组中携带的CV消息。每个维护 沿着MPLS LSP的中间点（MIP）接收分组并递减TTL，并且响应于确定TTL等于0，检查分组的有效载荷以确定分组携带CV消息。 然后，MIP可以将其MIP ID附加到具有上游MIP的任何先前MIP ID的有效载荷的路由记录字段，并且在TTL值为1的分组中沿着MPLS LSP向下游转发CV消息。终端MEP接收 CV消息，并将具有MIP ID和终结MEP ID的路由记录字段的CV回复发送到初始MEP。
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3.发明申请公开(公告)号：US20110280121A1
公开(公告)日：2011-11-17
申请号：US12778871
申请日：2010-05-12
CPC分类号： H04L41/0677
摘要： An example method includes detecting a failure at a first network element, the failure is associated with a link between the first network element and a second network element. The method also includes generating a list of network elements to be notified based on the failure, the second network element is included on the list. The method further includes generating an alarm indication signal (AIS) message, the AIS message identifies a plurality of tunnels affected by the failure. The AIS message is communicated to the second network element. In more detailed embodiments, each link between the first network element and the second network element includes a globally unique link identifier, which includes an associated autonomous system number. The globally unique link identifier can represent a string to be associated with the plurality of tunnels, the globally unique link identifier includes a source address and a destination address.
摘要翻译： 示例性方法包括检测第一网络元件的故障，故障与第一网络元件和第二网络元件之间的链路相关联。 该方法还包括基于故障生成要通知的网元的列表，第二网元包括在列表中。 该方法还包括生成报警指示信号（AIS）消息，AIS消息识别受故障影响的多个隧道。 AIS消息被传送到第二网元。 在更详细的实施例中，第一网络元件和第二网络元件之间的每个链路包括全球唯一链接标识符，其包括相关联的自主系统号码。 全球唯一的链路标识符可以表示要与多个隧道相关联的字符串，全球唯一的链路标识符包括源地址和目的地址。
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4.发明授权公开(公告)号：US08724454B2
公开(公告)日：2014-05-13
申请号：US12778871
申请日：2010-05-12
IPC分类号： G01R31/08
CPC分类号： H04L41/0677
摘要： An example method includes detecting a failure at a first network element, the failure is associated with a link between the first network element and a second network element. The method also includes generating a list of network elements to be notified based on the failure, the second network element is included on the list. The method further includes generating an alarm indication signal (AIS) message, the AIS message identifies a plurality of tunnels affected by the failure. The AIS message is communicated to the second network element. In more detailed embodiments, each link between the first network element and the second network element includes a globally unique link identifier, which includes an associated autonomous system number. The globally unique link identifier can represent a string to be associated with the plurality of tunnels, the globally unique link identifier includes a source address and a destination address.
摘要翻译： 示例性方法包括检测第一网络元件的故障，故障与第一网络元件和第二网络元件之间的链路相关联。 该方法还包括基于故障生成要通知的网元的列表，第二网元包括在列表中。 该方法还包括生成报警指示信号（AIS）消息，AIS消息识别受故障影响的多个隧道。 AIS消息被传送到第二网元。 在更详细的实施例中，第一网络元件和第二网络元件之间的每个链路包括全球唯一链接标识符，其包括相关联的自主系统号码。 全球唯一的链路标识符可以表示要与多个隧道相关联的字符串，全球唯一的链路标识符包括源地址和目的地址。
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5.发明授权Operating MPLS label switched paths and MPLS pseudowire in loopback mode 有权在环回模式下运行MPLS标签交换路径和MPLS伪线公开(公告)号：US08391163B2
公开(公告)日：2013-03-05
申请号：US12383366
申请日：2009-03-23
IPC分类号： H04J1/16
摘要： In one embodiment, an initiating maintenance end point (MEP) may transmit a lock message to lock a circuit traversing one or more maintenance intermediate points (MIPs) between the initiating MEP and an end MEP. The initiating MEP may then transmit an in-band packet containing a loopback request to a particular MIP along the circuit using a particular time-to-live (TTL) value in the packet to reach the particular MIP. Upon receiving the packet at the particular MIP, and in response to determining that the TTL has expired, the particular MIP inspects the packet to discover the loopback request, and correspondingly operates in a loopback mode.
摘要翻译： 在一个实施例中，启动维护端点（MEP）可以发送锁定消息以锁定经过起始MEP和结束MEP之间的一个或多个维护中间点（MIP）的电路。 然后，启动MEP可以使用分组中的特定生存时间（TTL）值将包含环回请求的带内分组沿着电路发送到特定的MIP，以达到特定的MIP。 在接收到特定MIP的分组时，响应于确定TTL已经到期，特定MIP检查分组以发现环回请求，并相应地以环回模式工作。
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6.发明申请Operating MPLS label switched paths and MPLS pseudowire in loopback mode 有权在环回模式下运行MPLS标签交换路径和MPLS伪线公开(公告)号：US20100238812A1
公开(公告)日：2010-09-23
申请号：US12383366
申请日：2009-03-23
摘要： In one embodiment, an initiating maintenance end point (MEP) may transmit a lock message to lock a circuit traversing one or more maintenance intermediate points (MIPs) between the initiating MEP and an end MEP. The initiating MEP may then transmit an in-band packet containing a loopback request to a particular MIP along the circuit using a particular time-to-live (TTL) value in the packet to reach the particular MIP. Upon receiving the packet at the particular MIP, and in response to determining that the TTL has expired, the particular MIP inspects the packet to discover the loopback request, and correspondingly operates in a loopback mode.
摘要翻译： 在一个实施例中，启动维护端点（MEP）可以发送锁定消息以锁定经过起始MEP和结束MEP之间的一个或多个维护中间点（MIP）的电路。 然后，启动MEP可以使用分组中的特定生存时间（TTL）值将包含环回请求的带内分组沿着电路发送到特定的MIP，以达到特定的MIP。 在接收到特定MIP的分组时，响应于确定TTL已经到期，特定MIP检查分组以发现环回请求，并相应地以环回模式工作。
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7.发明授权公开(公告)号：US08004964B2
公开(公告)日：2011-08-23
申请号：US12383359
申请日：2009-03-23
IPC分类号： G01R31/08
CPC分类号： H04L45/00 , H04L43/0811 , H04L45/22 , H04L45/28 , H04L45/50
摘要： In one embodiment, a protected switching provider edge (S-PE) and a backup S-PE may be operated, where the protected S-PE has at least one multi-segment pseudowire (MS-PW) and is between a first and second provider edge (PE) on the MS-PW. To protect the protected S-PE, the first and second PE may be informed of the backup S-PE and a backup label to reach the second and first PE, respectively, via the backup S-PE to remain on the MS-PW. Upon detecting loss of connectivity with the protected S-PE, the first and/or second PE may forward packets of the MS-PW to the backup S-PE with the corresponding backup label to reach the second or first PE, respectively, on the MS-PW.
摘要翻译： 在一个实施例中，可以操作受保护的交换机提供商边缘（S-PE）和备份S-PE，其中受保护的S-PE具有至少一个多段伪线（MS-PW），并且处于第一和第二 提供商边缘（PE）在MS-PW上。 为了保护受保护的S-PE，可以通过备份S-PE将第一和第二PE通知备份S-PE和备份标签分别到达第二个和第一个PE，以保留在MS-PW上。 在检测到与受保护的S-PE的连通性损失时，第一和/或第二PE可以将MS-PW的分组转发到具有相应备份标签的备份S-PE，以分别到达第二或第一PE MS-PW。
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8.发明申请公开(公告)号：US20100238795A1
公开(公告)日：2010-09-23
申请号：US12383359
申请日：2009-03-23
IPC分类号： H04L12/24
CPC分类号： H04L45/00 , H04L43/0811 , H04L45/22 , H04L45/28 , H04L45/50
摘要： In one embodiment, a protected switching provider edge (S-PE) and a backup S-PE may be operated, where the protected S-PE has at least one multi-segment pseudowire (MS-PW) and is between a first and second provider edge (PE) on the MS-PW. To protect the protected S-PE, the first and second PE may be informed of the backup S-PE and a backup label to reach the second and first PE, respectively, via the backup S-PE to remain on the MS-PW. Upon detecting loss of connectivity with the protected S-PE, the first and/or second PE may forward packets of the MS-PW to the backup S-PE with the corresponding backup label to reach the second or first PE, respectively, on the MS-PW.
摘要翻译： 在一个实施例中，可以操作受保护的交换机提供商边缘（S-PE）和备份S-PE，其中受保护的S-PE具有至少一个多段伪线（MS-PW），并且处于第一和第二 提供商边缘（PE）在MS-PW上。 为了保护受保护的S-PE，可以通过备份S-PE将第一和第二PE通知备份S-PE和备份标签分别到达第二个和第一个PE，以保留在MS-PW上。 在检测到与受保护的S-PE的连通性损失时，第一和/或第二PE可以将MS-PW的分组转发到具有相应备份标签的备份S-PE，以分别到达第二或第一PE MS-PW。
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9.发明授权System and method for reporting out-of-resources (OOR) conditions in a data network 有权在数据网络中报告资源不足（OOR）条件的系统和方法公开(公告)号：US08717899B2
公开(公告)日：2014-05-06
申请号：US10964184
申请日：2004-10-13
申请人： Sami Boutros , Muthurajah Sivabalan , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Rodolphe Figaro , Reshad A. Rahman
发明人： Sami Boutros , Muthurajah Sivabalan , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Rodolphe Figaro , Reshad A. Rahman
CPC分类号： H04L47/125 , H04L41/06 , H04L45/00 , H04L45/50 , H04L47/2408 , H04L47/745
摘要： A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.
摘要翻译： 用于以不涉及使用最大成本来指示实体的方式向诸如节点，线路卡和数据链路的实体（例如节点，线路卡和数据链路）广告外部资源（OOR）条件的系统和方法是“超出资源 。“根据该技术，实体的OOR条件在广告消息中包含的一个或多个类型长度值（TLV）对象中通告。 广告消息被洪泛到数据网络上的节点，以通知他们实体的OOR条件。 处理广告消息的头端节点可以使用包含在TLV对象中的信息来确定不包括与OOR条件相关联的实体的新标签交换路径（LSP）的路径。
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10.发明授权Using context labels to scale MAC tables on computer network edge devices 有权使用上下文标签缩放计算机网络边缘设备上的MAC表公开(公告)号：US08908527B2
公开(公告)日：2014-12-09
申请号：US13018125
申请日：2011-01-31
申请人： Sami Boutros , Yuri Tsier , Muthurajah Sivabalan , Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Luca Martini
发明人： Sami Boutros , Yuri Tsier , Muthurajah Sivabalan , Pradosh Mohapatra , Clarence Filsfils , John H. W. Bettink , Luca Martini
CPC分类号： H04L45/502 , H04L12/18 , H04L45/04
摘要： In one embodiment, an access component of a local network edge device receives traffic, and generates a frame for the traffic that includes a remote context label that identifies an access component of the remote network edge device to which the traffic is to be forwarded upon arrival at the remote network edge device, and a virtual circuit label corresponding to a particular virtual service of the traffic. The local network edge device forwards the frame towards the remote network edge device. In another embodiment, the frame may be received at a core component of the remote network edge device, an in response to the remote context label identifying an access component of the remote network edge device, forwarded to the access component, which determines the particular virtual service, and forwards the traffic from the frame out the access component towards an endpoint for the traffic.
摘要翻译： 在一个实施例中，本地网络边缘设备的接入组件接收业务，并且生成包括远程上下文标签的业务的帧，所述远程上下文标签识别到达所述业务将被转发到的远程网络边缘设备的接入组件 在远程网络边缘设备处，以及对应于业务的特定虚拟服务的虚拟电路标签。 本地网络边缘设备将帧转发到远程网络边缘设备。 在另一个实施例中，可以在远程网络边缘设备的核心组件处接收帧，响应于远程上下文标签识别远程网络边缘设备的接入组件，转发到接入组件，其确定特定虚拟 服务，并将来自帧的流量从访问组件转发到流量的端点。
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