公开(公告)号：EP3049931A4

公开(公告)日：2017-07-05

申请号：EP14847482

申请日：2014-07-29

申请人： CYAN INC

发明人： NAHLOUS PAUL SIMON ,  SUBRAMANIAM BALAJI

IPC分类号： H04L12/24 ,  H04L12/26 ,  H04L12/40 ,  H04L12/437

CPC分类号： H04L12/437 ,  H04L12/40195 ,  H04L41/0668 ,  H04L41/0672 ,  H04L41/0816 ,  H04L43/0811 ,  H04L45/18 ,  H04L45/22 ,  H04L45/28

摘要： Systems and methods are disclosed for providing redundancy in a network node implementing a ring protection protocol. Each of the two ring ports connecting the node to other nodes in a ring supporting the protocol may be maintained by a separate line card. Should one line card fail, traffic passing through the node may be redirected through the remaining ring port under the control of the surviving state machine. The two state machines may be coordinated over the backplane of the node to maintain a common state, making them transparent to other nodes. Additionally, the backplane link between the state machines may be monitored for failures that may be addressed with messages used to respond to general ring failures and by assigning one state machine to block a ring port upon recovery to prevent a loop within the ring until the ring protection link can be blocked.

摘要翻译： 公开了用于在实现环保护协议的网络节点中提供冗余的系统和方法。 将节点连接到支持该协议的环中的其他节点的两个环端口中的每一个都可以由单独的线卡来维护。 如果一个线路卡出现故障，那么通过该节点的业务可能会在剩余状态机的控制下通过剩余的环路端口重定向。 这两个状态机可以通过节点的背板进行协调以保持一个通用状态，使其对其他节点透明。 此外，状态机之间的背板链路可以被监视以查找可能用于响应一般环故障的消息以及通过指派一个状态机在恢复时阻止环端口以防止环内的环路直到环 保护链接可以被阻止。

公开(公告)号：EP3039830A4

公开(公告)日：2017-03-22

申请号：EP14840400

申请日：2014-05-28

申请人： CYAN INC ,  HOLMBERG ERIC ARTHUR ,  NAHLOUS PAUL SIMON ,  SUBRAMANIAM BALAJI

发明人： HOLMBERG ERIC ARTHUR ,  NAHLOUS PAUL SIMON ,  SUBRAMANIAM BALAJI

IPC分类号： H04L12/64 ,  H04L12/46 ,  H04L12/931

CPC分类号： H04L49/557 ,  H04L12/437 ,  H04L12/462 ,  H04L41/082 ,  H04L45/22 ,  H04L45/28 ,  H04L49/351 ,  H04L2012/421

摘要： Systems and methods are disclosed for effectuating control-plane changes at increased speeds to protect a network in which switching operations are performed. Operations to effectuate control-plane changes in the network can be divided between software and more-rapid, dedicated hardware within a line card. Examples of operations reserved to hardware implementation can include blocking and unblocking of ports, flushing of learned entries from switch tables, and coordination of control-plane changes through the generation of messages sent between nodes, and also between line cards of a node. Determinations about the need for hardware-driven, control-plane changes may be made based on events occurring in the network in accordance with any of a number of different network protection protocols. The protocol may be implemented in a state machine and the software may determine the state of the hardware through a master/slave relationship.

公开(公告)号：EP3049931A1

公开(公告)日：2016-08-03

申请号：EP14847482.8

申请日：2014-07-29

申请人： Cyan Inc.

发明人： NAHLOUS, Paul, Simon ,  SUBRAMANIAM, Balaji

IPC分类号： G06F11/00

CPC分类号： H04L12/437 ,  H04L12/40195 ,  H04L41/0668 ,  H04L41/0672 ,  H04L41/0816 ,  H04L43/0811 ,  H04L45/18 ,  H04L45/22 ,  H04L45/28

摘要： Systems and methods are disclosed for providing redundancy in a network node implementing a ring protection protocol. Each of the two ring ports connecting the node to other nodes in a ring supporting the protocol may be maintained by a separate line card. Should one line card fail, traffic passing through the node may be redirected through the remaining ring port under the control of the surviving state machine. The two state machines may be coordinated over the backplane of the node to maintain a common state, making them transparent to other nodes. Additionally, the backplane link between the state machines may be monitored for failures that may be addressed with messages used to respond to general ring failures and by assigning one state machine to block a ring port upon recovery to prevent a loop within the ring until the ring protection link can be blocked.

摘要翻译： 公开了用于在实现环保护协议的网络节点中提供冗余的系统和方法。 将节点连接到支持协议的环中的其他节点的两个环形端口中的每一个可以由单独的线路卡维护。 如果一条线卡出现故障，通过节点的流量可能会通过剩余的环形端口重定向，在剩余的状态机的控制下。 两个状态机可以在节点的背板上协调以保持共同的状态，使得它们对其他节点是透明的。 另外，可以监视状态机之间的背板连接，以便可以利用用于响应一般环路故障的消息来解决故障，并且通过分配一个状态机来在恢复时阻止环形端口以防止环内环路直到环 保护链路可以被阻止。

公开(公告)号：EP3039830A1

公开(公告)日：2016-07-06

申请号：EP14840400.7

申请日：2014-05-28

申请人： Cyan Inc. ,  Holmberg, Eric Arthur ,  Nahlous, Paul Simon ,  Subramaniam, Balaji

发明人： HOLMBERG, Eric Arthur ,  NAHLOUS, Paul Simon ,  SUBRAMANIAM, Balaji

IPC分类号： H04L12/64

CPC分类号： H04L49/557 ,  H04L12/437 ,  H04L12/462 ,  H04L41/082 ,  H04L45/22 ,  H04L45/28 ,  H04L49/351 ,  H04L2012/421

摘要： Systems and methods are disclosed for effectuating control-plane changes at increased speeds to protect a network in which switching operations are performed. Operations to effectuate control-plane changes in the network can be divided between software and more-rapid, dedicated hardware within a line card. Examples of operations reserved to hardware implementation can include blocking and unblocking of ports, flushing of learned entries from switch tables, and coordination of control-plane changes through the generation of messages sent between nodes, and also between line cards of a node. Determinations about the need for hardware-driven, control-plane changes may be made based on events occurring in the network in accordance with any of a number of different network protection protocols. The protocol may be implemented in a state machine and the software may determine the state of the hardware through a master/slave relationship.

摘要翻译： 公开了用于以增加的速度实现控制平面改变的系统和方法，以保护执行切换操作的网络。 实现网络中控制平面变化的操作可以在线卡内的软件和更快速，专用的硬件之间进行划分。 保留给硬件实现的操作的示例可以包括阻塞和解除端口的阻塞，从交换机表中刷新学习的条目，以及通过生成在节点之间发送的消息以及节点的线卡之间的协调控制平面改变。 可以基于根据多个不同网络保护协议中的任何一个在网络中发生的事件来进行关于硬件驱动的控制平面改变的需要的确定。 该协议可以在状态机中实现，并且软件可以通过主/从关系来确定硬件的状态。