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1. 发明申请

US20090086644A1 DETECTING DATA PLANE LIVELINESS OF A LABEL-SWITCHED PATH 有权
标题翻译：检测标签路径的数据平面生活
公开(公告)号：US20090086644A1
公开(公告)日：2009-04-02
申请号：US12329708
申请日：2008-12-08
申请人： Kireeti KOMPELLA , Ping Pan , Nischal Sheth
发明人： Kireeti KOMPELLA , Ping Pan , Nischal Sheth
IPC分类号： G06F11/30
CPC分类号： H04L43/50 , H04L43/0811 , H04L43/12
摘要： Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e., that forwarding matches what the routing protocols determined as the path. A reliable return path is used for the reply.
摘要翻译：检测标签交换路径（LSP）是否正常工作。为了测试属于特定转发等价类（FEC）的分组实际上在作为该FEC的出口的标签交换路由器（LSR）上结束其MPLS LSP，携带有关正在被验证LSP的FEC的信息的请求消息可以使用。请求消息可以像属于该FEC的任何其他分组一样转发。支持基本的连接测试以及故障隔离测试。在基本连接测试模式下，分组应到达LSP的末尾，此时将发送到出口LSR的控制平面。然后，LSR验证它确实是FEC的出口。在故障隔离测试模式下，将数据包发送到每个传输LSR的控制平面，进行各种检查，确认它是LSP的传输LSR。传输LSR还可以返回有助于检查控制平面对数据平面的进一步信息，即，该转发与确定为路径的路由协议相匹配。答复使用可靠的返回路径。

2. 发明授权

US07463591B1 Detecting data plane liveliness of a label-switched path 有权
标题翻译：检测标签交换路径的数据平面生动度
公开(公告)号：US07463591B1
公开(公告)日：2008-12-09
申请号：US10365598
申请日：2003-02-12
申请人： Kireeti Kompella , Ping Pan , Nischal Sheth
发明人： Kireeti Kompella , Ping Pan , Nischal Sheth
IPC分类号： H04L12/26
CPC分类号： H04L43/50 , H04L43/0811 , H04L43/12
摘要： Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e., that forwarding matches what the routing protocols determined as the path. A reliable return path is used for the reply.
摘要翻译：检测标签交换路径（LSP）是否正常工作。为了测试属于特定转发等价类（FEC）的分组实际上在作为该FEC的出口的标签交换路由器（LSR）上结束其MPLS LSP，携带有关正在被验证LSP的FEC的信息的请求消息可以使用。请求消息可以像属于该FEC的任何其他分组一样转发。支持基本的连接测试以及故障隔离测试。在基本连接测试模式下，分组应到达LSP的末尾，此时将发送到出口LSR的控制平面。然后，LSR验证它确实是FEC的出口。在故障隔离测试模式下，将数据包发送到每个传输LSR的控制平面，进行各种检查，确认它是LSP的传输LSR。传输LSR还可以返回有助于检查控制平面对数据平面的进一步信息，即，该转发与确定为路径的路由协议相匹配。答复使用可靠的返回路径。

3. 发明授权

US07894352B2 Detecting data plane liveliness of a label-switched path 有权
标题翻译：检测标签交换路径的数据平面生动度
公开(公告)号：US07894352B2
公开(公告)日：2011-02-22
申请号：US12329708
申请日：2008-12-08
申请人： Kireeti Kompella , Ping Pan , Nischal Sheth
发明人： Kireeti Kompella , Ping Pan , Nischal Sheth
IPC分类号： H04L12/56
CPC分类号： H04L43/50 , H04L43/0811 , H04L43/12
摘要： Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e., that forwarding matches what the routing protocols determined as the path. A reliable return path is used for the reply.
摘要翻译：检测标签交换路径（LSP）是否正常工作。为了测试属于特定转发等价类（FEC）的分组实际上在作为该FEC的出口的标签交换路由器（LSR）上结束其MPLS LSP，携带有关正在被验证LSP的FEC的信息的请求消息可以使用。请求消息可以像属于该FEC的任何其他分组一样转发。支持基本的连接测试以及故障隔离测试。在基本连接测试模式下，分组应到达LSP的末尾，此时将发送到出口LSR的控制平面。然后，LSR验证它确实是FEC的出口。在故障隔离测试模式下，将数据包发送到每个传输LSR的控制平面，进行各种检查，确认它是LSP的传输LSR。传输LSR还可以返回有助于检查控制平面对数据平面的进一步信息，即，该转发与确定为路径的路由协议相匹配。答复使用可靠的返回路径。

4. 发明授权

US07940698B1 Point to multi-point label switched paths with label distribution protocol 有权
标题翻译：指向具有标签分发协议的多点标签交换路径
公开(公告)号：US07940698B1
公开(公告)日：2011-05-10
申请号：US12499606
申请日：2009-07-08
申请人： Ina Minei , Kireeti Kompella , Nischal Sheth
发明人： Ina Minei , Kireeti Kompella , Nischal Sheth
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/00 , H04L45/16 , H04L45/302 , H04L45/50 , H04L45/507
摘要： The label distribution protocol (LDP) is extended to set up a point to multi-point (P2MP) label switched path (LSP) across a computer network from a source network device to one or more destination network devices. LDP is extended to create a P2MP label map message containing a label and a P2MP forwarding equivalence class (FEC) element having a root node address and an identifier. The P2MP FEC element may, for example, associate an address of the root node of the P2MP LSP with an opaque identifier. The P2MP FEC element uniquely identifies the P2MP LSP. The P2MP FEC element may be advertised with a label in a P2MP label map message. A source network device or the destination network devices may initiate setup and teardown of the P2MP LSP. The P2MP label map messages may be propagated from the destination network devices to the source network device.
摘要翻译：标签分发协议（LDP）被扩展以在计算机网络上从源网络设备到一个或多个目的地网络设备建立点到多点（P2MP）标签交换路径（LSP）。扩展LDP以创建包含标签的P2MP标签映射消息和具有根节点地址和标识符的P2MP转发等价类（FEC）元素。例如，P2MP FEC元素可以将P2MP LSP的根节点的地址与不透明标识符相关联。 P2MP FEC元素唯一标识P2MP LSP。 P2MP FEC元素可以在P2MP标签映射消息中用标签通告。源网络设备或目的网络设备可以启动P2MP LSP的建立和拆卸。 P2MP标签映射消息可以从目的网络设备传播到源网络设备。

5. 发明授权

US08611359B1 Scaling MPLS across areas of an autonomous system using labeled interior border gateway protocol 有权
标题翻译：使用标记的内部边界网关协议在自治系统的区域范围内扩展MPLS
公开(公告)号：US08611359B1
公开(公告)日：2013-12-17
申请号：US12626221
申请日：2009-11-25
申请人： Kireeti Kompella , Nischal Sheth , Shivani Aggarwal , Yakov Rekhter
发明人： Kireeti Kompella , Nischal Sheth , Shivani Aggarwal , Yakov Rekhter
IPC分类号： H04L12/28
CPC分类号： H04L45/04 , H04L45/50
摘要： Techniques are described for scaling Multiprotocol Label Switching (MPLS) across areas of an autonomous system using a labeled interior Border Gateway Protocol (iBGP). A method includes executing a first label distribution protocol at a border node at a border between two of a plurality of interior gateway protocol (IGP) areas of a single autonomous system (AS), and exchanging label distribution messages using the first label distribution protocol to establish a first intra-area label switched path (LSP) within a first one of IGP areas. The method also includes executing a labeled interior border gateway protocol at the border node, and exchanging label distribution messages using the labeled interior border gateway protocol to establish a hierarchical inter-area LSP that runs over the previously established first intra-area LSP, wherein the hierarchical inter-area LSP extends across the plurality of IGP areas of the AS.
摘要翻译：描述了使用标记的内部边界网关协议（iBGP）在跨自治系统的区域缩放多协议标签交换（MPLS）的技术。一种方法包括在单个自治系统（AS）的多个内部网关协议（IGP）区域中的两个之间的边界处的边界节点处执行第一标签分发协议，以及使用第一标签分发协议交换标签分发消息，在第一个IGP区域内建立第一个区域内标签交换路径（LSP）。该方法还包括在边界节点处执行标记的内部边界网关协议，并且使用标记的内部边界网关协议来交换标签分发消息，以建立在先前建立的第一区域内LSP上运行的分层区域间LSP，其中，分层区域间LSP跨越AS的多个IGP区域延伸。

6. 发明授权

US07564803B1 Point to multi-point label switched paths with label distribution protocol 有权
标题翻译：指向具有标签分发协议的多点标签交换路径
公开(公告)号：US07564803B1
公开(公告)日：2009-07-21
申请号：US11215813
申请日：2005-08-29
申请人： Ina Minei , Kireeti Kompella , Nischal Sheth
发明人： Ina Minei , Kireeti Kompella , Nischal Sheth
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/00 , H04L45/16 , H04L45/302 , H04L45/50 , H04L45/507
摘要： The label distribution protocol (LDP) is extended to set up a point to multi-point (P2MP) label switched path (LSP) across a computer network from a source network device to one or more destination network devices. LDP is extended to create a P2MP label map message containing a label and a P2MP forwarding equivalence class (FEC) element having a root node address and an identifier. The P2MP FEC element may, for example, associate an address of the root node of the P2MP LSP with an opaque identifier. The P2MP FEC element uniquely identifies the P2MP LSP. The P2MP FEC element may be advertised with a label in a P2MP label map message. A source network device or the destination network devices may initiate setup and teardown of the P2MP LSP. The P2MP label map messages may be propagated from the destination network devices to the source network device.
摘要翻译：标签分发协议（LDP）被扩展以在计算机网络上从源网络设备到一个或多个目的地网络设备建立点到多点（P2MP）标签交换路径（LSP）。扩展LDP以创建包含标签的P2MP标签映射消息和具有根节点地址和标识符的P2MP转发等价类（FEC）元素。例如，P2MP FEC元素可以将P2MP LSP的根节点的地址与不透明标识符相关联。 P2MP FEC元素唯一标识P2MP LSP。 P2MP FEC元素可以在P2MP标签映射消息中用标签通告。源网络设备或目的网络设备可以启动P2MP LSP的建立和拆卸。 P2MP标签映射消息可以从目的网络设备传播到源网络设备。

7. 发明申请

US20100142370A1 PROTECTING CONNECTION TRAFFIC USING FILTERS 有权
标题翻译：使用过滤器保护连接交通
公开(公告)号：US20100142370A1
公开(公告)日：2010-06-10
申请号：US12705713
申请日：2010-02-15
申请人： Ping PAN , Der-Hwa Gan , Keith E. Holleman , Manoj Leelanivas , Nischal Sheth , Arun Vaidyanathan
发明人： Ping PAN , Der-Hwa Gan , Keith E. Holleman , Manoj Leelanivas , Nischal Sheth , Arun Vaidyanathan
IPC分类号： G06F11/00
CPC分类号： H04L43/0811 , H04L41/0668
摘要： A connection between network nodes in a communication network is backed up. A failover label-switched path (LSP) is created starting at a first network node of a connection and ending 5 at the second node of the connection, while bypassing the protected connection. In the event of connection failure, data is transmitted through the failover LSP. A network operator can selectively protect different types of data by using filters that bind one or more types of traffic received over one or more interfaces to different failover LSPs.
摘要翻译：备份通信网络中的网络节点之间的连接。从连接的第一个网络节点开始创建故障切换标签交换路径（LSP），并在连接的第二个节点处结束5，同时绕过受保护的连接。在连接失败的情况下，通过故障转移LSP传输数据。网络运营商可以通过使用将一个或多个接口上接收到的一种或多种类型的业务绑定到不同的故障切换LSP的过滤器来选择性地保护不同类型的数据。

8. 发明申请

US20120020205A1 PROTECTING CONNECTION TRAFFIC USING FILTERS 有权
标题翻译：使用过滤器保护连接交通
公开(公告)号：US20120020205A1
公开(公告)日：2012-01-26
申请号：US13250731
申请日：2011-09-30
申请人： Ping PAN , Der-Hwa Gan , Keith E. Holleman , Manoj Leelanivas , Nischal Sheth , Arun Vaidyanathan
发明人： Ping PAN , Der-Hwa Gan , Keith E. Holleman , Manoj Leelanivas , Nischal Sheth , Arun Vaidyanathan
IPC分类号： H04L12/26
CPC分类号： H04L43/0811 , H04L41/0668
摘要： A connection between network nodes in a communication network is backed up. A failover switched path such as a label-switched path (LSP) is created starting at a first network node of a connection and ending at the second node of the connection, while bypassing the protected connection. In the event of connection failure, data is transmitted through the failover switched path (e.g., LSP). A network operator can selectively protect different types of data by using filters that bind one or more types of traffic received over one or more interfaces to different failover switched paths (LSPs).
摘要翻译：备份通信网络中的网络节点之间的连接。创建从连接的第一个网络节点开始并在连接的第二个节点结束的故障转移交换路径（如标签交换路径（LSP）），同时绕过受保护的连接。在连接失败的情况下，通过故障转移交换路径（例如，LSP）传输数据。网络运营商可以通过使用将通过一个或多个接口接收的一种或多种类型的业务绑定到不同的故障转移交换路径（LSP）的过滤器来选择性地保护不同类型的数据。

9. 发明授权

US07680952B1 Protecting connection traffic using filters 有权
标题翻译：使用过滤器保护连接流量
公开(公告)号：US07680952B1
公开(公告)日：2010-03-16
申请号：US10869501
申请日：2004-06-16
申请人： Ping Pan , Der-Hwa Gan , Keith E. Holleman , Manoj Leelanivas , Nischal Sheth , Arun Vaidyanathan
发明人： Ping Pan , Der-Hwa Gan , Keith E. Holleman , Manoj Leelanivas , Nischal Sheth , Arun Vaidyanathan
IPC分类号： G06F13/00
CPC分类号： H04L43/0811 , H04L41/0668
摘要： A connection between network nodes in a communication network is backed up. A failover label-switched path (LSP) is created starting at a first network node of a connection and ending at the second node of the connection, while bypassing the protected connection. In the event of connection failure, data is transmitted through the failover LSP. A network operator can selectively protect different types of data by using filters that bind one or more types of traffic received over one or more interfaces to different failover LSPs.
摘要翻译：备份通信网络中的网络节点之间的连接。从连接的第一个网络节点开始创建故障转移标签交换路径（LSP），并在连接的第二个节点处结束，同时绕过受保护的连接。在连接失败的情况下，通过故障转移LSP传输数据。网络运营商可以通过使用将通过一个或多个接口接收的一种或多种类型的业务绑定到不同的故障切换LSP的过滤器来选择性地保护不同类型的数据。

10. 发明授权

US07336615B1 Detecting data plane livelines in connections such as label-switched paths 有权
标题翻译：在诸如标签交换路径的连接中检测数据平面线条
公开(公告)号：US07336615B1
公开(公告)日：2008-02-26
申请号：US10179927
申请日：2002-06-25
申请人： Ping Pan , Nischal Sheth
发明人： Ping Pan , Nischal Sheth
IPC分类号： H04L12/26
CPC分类号： H04L43/50 , H04L43/12
摘要： Testing the liveliness of a data plane of a label switched path (LSP) using a two stage approach. The first stage may use a general echo request operation that may be implemented using hardware. Therefore, the first stage does not heavily burden the control plane of the LSR. If a suspect LSP passes the first stage of the diagnostic operation, nothing more needs to be done. If, however, the suspect LSP fails the first stage, the diagnostic operation proceeds to a second stage. The second stage of the diagnostic operation sends probing massages through the suspect LSP, but uses the control plane to deliver the acknowledging messages. If the suspect LSP fails the second stage of the diagnostic operation, the ingress LSR can infer that the LSP is down, and begin recovery actions. The probing messages may include padding so that MTU limits can be tested. In addition, the probing messages may be encapsulated in a protocol that allows flow control, thereby protecting an LSR that can receive such messages from DoS attacks.
摘要翻译：使用两阶段方法测试标签交换路径（LSP）的数据平面的活力。第一阶段可以使用可以使用硬件来实现的一般回波请求操作。因此，第一阶段不会对LSR的控制平面造成很大的负担。如果可疑的LSP通过诊断操作的第一阶段，则不需要再进行任何操作。然而，如果可疑LSP在第一阶段失败，则诊断操作进行到第二阶段。诊断操作的第二阶段通过可疑LSP发送探测按摩，但是使用控制平面传送确认消息。如果可疑LSP在诊断操作的第二阶段失败，入口LSR可以推断LSP已经关闭，并开始恢复操作。探测消息可以包括填充，以便可以测试MTU限制。此外，探测消息可以封装在允许流控制的协议中，从而保护可以从DoS攻击中接收这样的消息的LSR。

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