公开(公告)号：US08619550B2

公开(公告)日：2013-12-31

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： G01R31/08

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。

公开(公告)号：US08055791B2

公开(公告)日：2011-11-08

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： 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 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。

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。

公开(公告)号：US07702810B1

公开(公告)日：2010-04-20

申请号：US10357262

申请日：2003-02-03

申请人： Ping Pan ,  Der-Hwa Gan ,  Nischal Sheth

发明人： Ping Pan ,  Der-Hwa Gan ,  Nischal Sheth

IPC分类号： G06F15/173 ,  G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

CPC分类号： H04L45/00 ,  H04L45/50

摘要： Outages in a label-switched path (LSP) are detected quickly using adjacency information, such as IGP “hello neighbor” queries. Protocols, such as IGP can be instructed to check certain adjacencies more frequently. For example, a node in an LSP can determine a next downstream node in the LSP as an adjacency, check that adjacency much more frequently, and in the event that the adjacency is lost (due to a down link, a down interface, or a down node), switch any LSPs that have the adjacency to a failover path or route. Since these checks need not be performed using hardware signaling, outages of shared media interfaces, such as Ethernet and Gigabit Ethernet, can be checked.

摘要翻译： 使用邻接信息（例如IGP“hello neighbor”）查询来快速检测标签交换路径（LSP）中的中断。 可以指示诸如IGP的协议更频繁地检查某些邻接。 例如，LSP中的节点可以将LSP中的下一个下游节点确定为邻接关系，更频繁地检查邻接关系，并且在邻接丢失的情况下（由于下行链路，down接口或 down节点），将与邻接关系的任何LSP切换到故障转移路径或路由。 由于不需要使用硬件信号执行这些检查，因此可以检查诸如以太网和千兆以太网之类的共享介质接口的故障。

公开(公告)号：US08693471B2

公开(公告)日：2014-04-08

申请号：US13021017

申请日：2011-02-04

申请人： Kireeti Kompella ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

发明人： Kireeti Kompella ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

IPC分类号： H04L12/56 ,  G06F15/173

CPC分类号： H04L45/50

摘要： When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for a limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.

摘要翻译： 当节点必须重新启动其控制组件或其控制组件的（例如，标签交换路径信令）部分时，如果该节点可以在重新启动时保留其转发信息，则这种重新启动对标签交换路径的影响 ）包括重启节点被最小化。 节点通过控制组件（部分）重新启动来保留转发信息的能力被公布。 在重新启动的情况下，可以在有限的时间内使用陈旧的转发信息。 重新启动节点可以使用其转发信息以及接收到的标签路径广告来确定哪个标签应该与路径相关联，以便向对等体通告。

公开(公告)号：US20110128968A1

公开(公告)日：2011-06-02

申请号：US13021017

申请日：2011-02-04

申请人： Kireeti KOMPELLA ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

发明人： Kireeti KOMPELLA ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

IPC分类号： H04L12/56

CPC分类号： H04L45/50

摘要： When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for a limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.

摘要翻译： 当节点必须重新启动其控制组件或其控制组件的（例如，标签交换路径信令）部分时，如果该节点可以在重新启动时保留其转发信息，则这种重新启动对标签交换路径的影响 ）包括重启节点被最小化。 节点通过控制组件（部分）重新启动来保留转发信息的能力被公布。 在重新启动的情况下，可以在有限的时间内使用陈旧的转发信息。 重新启动节点可以使用其转发信息以及接收到的标签路径广告来确定哪个标签应该与路径相关联，以便向对等体通告。

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。

公开(公告)号：US07903651B2

公开(公告)日：2011-03-08

申请号：US12101245

申请日：2008-04-11

申请人： Kireeti Kompella ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

发明人： Kireeti Kompella ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

IPC分类号： H04L12/56 ,  G06F15/173

CPC分类号： H04L45/50

摘要： When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) the include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for an limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.

摘要翻译： 当节点必须重新启动其控制组件或其控制组件的（例如，标签交换路径信令）部分时，如果该节点可以在重新启动时保留其转发信息，则这种重新启动对标签交换路径的影响 ）包括重启节点被最小化。 节点通过控制组件（部分）重新启动来保留转发信息的能力被公布。 在重新启动的情况下，过期的转发信息可以在有限的时间内使用。 重新启动节点可以使用其转发信息以及接收到的标签路径广告来确定哪个标签应该与路径相关联，以便向对等体通告。

公开(公告)号：US20080192762A1

公开(公告)日：2008-08-14

申请号：US12101245

申请日：2008-04-11

申请人： Kireeti KOMPELLA ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

发明人： Kireeti KOMPELLA ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

IPC分类号： H04L12/56

CPC分类号： H04L45/50

摘要： When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) the include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for an limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.

摘要翻译： 当节点必须重新启动其控制组件或其控制组件的（例如，标签交换路径信令）部分时，如果该节点可以在重新启动时保留其转发信息，则这种重新启动对标签交换路径的影响 ）包括重启节点被最小化。 节点通过控制组件（部分）重新启动来保留转发信息的能力被公布。 在重新启动的情况下，过期的转发信息可以在有限的时间内使用。 重新启动节点可以使用其转发信息以及接收到的标签路径广告来确定哪个标签应该与路径相关联，以便向对等体通告。

公开(公告)号：US07359377B1

公开(公告)日：2008-04-15

申请号：US10095000

申请日：2002-03-11

申请人： Kireeti Kompella ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

发明人： Kireeti Kompella ,  Manoj Leelanivas ,  Ping Pan ,  Yakov Rekhter

IPC分类号： H04L12/56

CPC分类号： H04L45/50

摘要： When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) the include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for an limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.

摘要翻译： 当节点必须重新启动其控制组件或其控制组件的（例如，标签交换路径信令）部分时，如果该节点可以在重新启动时保留其转发信息，则这种重新启动对标签交换路径的影响 ）包括重启节点被最小化。 节点通过控制组件（部分）重新启动来保留转发信息的能力被公布。 在重新启动的情况下，过期的转发信息可以在有限的时间内使用。 重新启动节点可以使用其转发信息以及接收到的标签路径广告来确定哪个标签应该与路径相关联，以便向对等体通告。