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1. 发明授权

US07093027B1 Fast connection protection in a virtual local area network based stack environment 有权
标题翻译：在基于虚拟局域网的堆栈环境中快速连接保护
公开(公告)号：US07093027B1
公开(公告)日：2006-08-15
申请号：US10201852
申请日：2002-07-23
申请人： Lior Shabtay , Yoav Kluger , Yaron Raz
发明人： Lior Shabtay , Yoav Kluger , Yaron Raz
IPC分类号： H04L12/28
CPC分类号： H04L12/4633 , H04L12/4641 , H04L43/0811 , H04L45/00 , H04L45/22 , H04L45/28 , H04L45/50
摘要： A fast protection mechanism capable of maintaining end-to-end and fast local protection on the order of sub 50 ms for both VLAN only based connections and for connections that are based partially on VLAN technology and partially on MPLS technology. The present invention is suitable for use edge switches configured in a stack or ring topology. The NMS provisions both the main and alternative VLANs in each edge switch in the stack portions of the network. When a link failure occurs, the edge switches on either end of the failed link immediately switch all protected traffic going through that link to the alternative VLAN. The packets are then returned on the links over which they were received. Hello messages are used to signal the remote end that a link failure has occurred and that protected traffic must be switched to the main or alternative VLAN in accordance with the VLAN the Hello message was received on.
摘要翻译：一种快速保护机制，能够为仅基于VLAN的连接以及部分基于VLAN技术部分基于MPLS技术的连接维护端到端和快速的本地保护，时间小于50 ms。本发明适用于以堆叠或环形拓扑结构配置的边缘交换机。 NMS在网络的堆叠部分中提供每个边缘交换机中的主要和替代VLAN。当发生链路故障时，故障链路任一端的边缘切换将立即将通过该链路的所有受保护流量切换到备用VLAN。然后，数据包在它们被接收的链路上返回。 Hello消息用于向远程信号发送链路故障，并且受保护流量必须根据收到的Hello消息的VLAN切换到主VLAN或备用VLAN。

2. 发明授权

US07197008B1 End-to-end notification of local protection using OAM protocol 有权
标题翻译：使用OAM协议的端到端通知本地保护
公开(公告)号：US07197008B1
公开(公告)日：2007-03-27
申请号：US10190236
申请日：2002-07-05
申请人： Lior Shabtay , Yaron Raz , Yoav Kluger
发明人： Lior Shabtay , Yaron Raz , Yoav Kluger
IPC分类号： H04L12/26 , H04L12/56 , G06F15/16 , G06F15/173
CPC分类号： H04L45/00 , H04L12/4633 , H04L45/22 , H04L45/28 , H04L45/50 , H04L2212/00
摘要： An end-to-end monitoring mechanism whereby edge nodes are notified that a particular path flows through a local protection tunnel along the way. The notification mechanism utilizes OAM packets which include a link protection indication that are transmitted on the Ethernet service layer. The link protection indication may be represented by one or more flags to indicate that local protection is in place along the path. The mechanism enables fast local protection to be used with slower end-to-end protection by informing the latter when local protection is activated. In an implementation in which local-protection does not preserve the CIR of the protected traffic, the invention provides minimal interruption of Committed Information Rate (CIR) connections by minimizing the time traffic is diverted through local protection tunnels. Notification of the edge node that local protection is in use occurs very quickly, thus allowing the edge node to rapidly switch to a backup path.
摘要翻译：端到端监控机制，通过边缘节点通知特定路径沿着本地保护隧道流过。通知机制利用OAM包，包括在以太网业务层上发送的链路保护指示。链路保护指示可以由一个或多个标志来表示，以指示沿着该路径的本地保护就位。该机制使得能够通过在启用本地保护时通知后者来实现较慢的端到端保护，从而实现快速本地保护。在本地保护不保护受保护流量的CIR的实现中，本发明通过最小化通过本地保护隧道转发的时间来最小化承诺信息速率（CIR）连接的中断。本地保护正在使用的边缘节点的通知非常快，从而允许边缘节点快速切换到备份路径。

3. 发明申请

US20110194404A1 SYSTEM AND METHOD FOR FAST PROTECTION OF DUAL-HOMED VIRTUAL PRIVATE LAN SERVICE (VPLS) SPOKES 审中-公开
标题翻译：用于快速保护双重虚拟私有网络服务（VPLS）SPOKES的系统和方法
公开(公告)号：US20110194404A1
公开(公告)日：2011-08-11
申请号：US12704234
申请日：2010-02-11
申请人： Yoav Kluger , Lior Shabtay
发明人： Yoav Kluger , Lior Shabtay
IPC分类号： H04J3/14 , H04L12/28
CPC分类号： H04L45/48 , H04L12/40189 , H04L12/437 , H04L45/04 , H04L45/68
摘要： A novel and useful system and method for fast protection of dual homed Virtual Private LAN Service (VPLS) spokes. Fast protection is achieved by forwarding traffic to the dual homed VPLS spoke from the VSI that is not currently the one currently serving it, as long as the traffic is known unicast. Egress traffic at the VSI that does not currently serve the VPLS-spoke is re-routed over a protection transport entity to the VPLS-spoke through the device of the VSI currently serving it. Broadcast, multicast and unknown (BMU) traffic is sent to the VPLS spoke only by the BMU-primary VSI. BMU frames received at the BMU-secondary VSI are dropped. A fast election process serves to elect the BMU-primary for coordinating between the two VSIs serving the same VPLS spoke. In addition, a flag is inserted in each frame at an ingress VSI to indicate whether the frame is known or unknown unicast. Unknown unicast frames are forwarded to the VPLS spoke only by the BMU-primary.
摘要翻译：一种新颖有用的系统和方法，用于双重归属虚拟专用局域网服务（VPLS）辐射的快速保护。只要业务被称为单播，就可以通过将流量从VSI转发到目前不在服务的VSI的双归属VPLS分支来实现快速保护。目前不服务于VPLS-spoke的VSI上的出口流量通过保护传输实体通过目前服务于其的VSI的设备重新路由到VPLS-spoke。广播，组播和未知（BMU）流量仅通过BMU主VSI发送到VPLS。在BMU次级VSI处接收到的BMU帧被丢弃。快速选举过程用于选择BMU主用于在服务于相同VPLS语音的两个VSI之间进行协调。另外，在入口VSI的每个帧中插入一个标志，以指示该帧是否是已知的或未知的单播。未知的单播帧被转发到仅由BMU主设备的VPLS辐条。

4. 发明授权

US07545735B1 Scalable protection mechanism for hierarchical multicast service in ring based networks 有权
标题翻译：基于环网的分层组播业务的可扩展保护机制
公开(公告)号：US07545735B1
公开(公告)日：2009-06-09
申请号：US10386044
申请日：2003-03-11
申请人： Lior Shabtay , Yoav Kluger
发明人： Lior Shabtay , Yoav Kluger
IPC分类号： G01R31/08 , H04L1/00 , H04L12/28 , H04L12/56
CPC分类号： H04L12/42 , H04L1/22 , H04L12/1886 , H04L12/437 , H04L12/4633 , H04L45/16 , H04L45/50 , H04L45/66 , H04L2001/0093
摘要： A novel fast and scalable protection mechanism for protecting hierarchical multicast service in ring based networks. The mechanism of the present invention is especially suitable for use in Multi-Protocol Label Switching (MPLS) ring based networks such as Metro Ethernet Networks (MENs). The mechanism provides fast protection for MPLS based point-to-multipoint (P2MP) Label Switched Paths (LSPs) in a scalable manner. Each multicast connection on each ring in the network is split into two sub-LSPs: a primary P2MP sub-LSP originating on a primary node and a secondary P2MP sub-LSP originating on a secondary node traveling opposite to the primary path. For each node to be protected, a point-to-point protection tunnel is provisioned from that node to a secondary node that forwards the packets to the secondary path on all child rings connected to that parent ring through the protected node and that are provisioned to receive the specific multicast connection. In the event of a failure, all the multicast traffic on that ring is directed through the protection tunnel to the secondary node. Upon exiting the protection tunnel, the packets are forwarded to the secondary LSP on the child rings for which this node is the secondary node and also continue along the primary LSP on the parent ring and along all child rings for which this node is the primary node.
摘要翻译：一种用于在环网中保护分层多播服务的新型快速可扩展的保护机制。本发明的机制特别适用于诸如城域以太网（MEN）的多协议标签交换（MPLS）环网。该机制以可扩展的方式为基于MPLS的点对多点（P2MP）标签交换路径（LSP）提供快速保护。网络中每个环的每个组播连接分为两个子LSP：主节点上的主P2MP子LSP和源于与主路径相反的二级节点的辅助P2MP子LSP。对于要保护的每个节点，从该节点向从属节点提供点到点保护隧道，该次节点通过受保护节点将分组转发到与该父环连接的所有子环上的辅路径，并被提供给接收特定的多播连接。在发生故障的情况下，该环上的所有组播流量都通过保护隧道引导到辅助节点。退出保护隧道后，数据包将转发到子节点上的辅助LSP，该子节点是该节点是辅助节点，并且还沿着父环上的主LSP以及沿着该节点为主节点的所有子环继续。

5. 发明授权

US06643612B1 Mechanism and protocol for per connection based service level agreement measurement 有权
标题翻译：基于连接的服务级别协议测量的机制和协议
公开(公告)号：US06643612B1
公开(公告)日：2003-11-04
申请号：US09894666
申请日：2001-06-28
申请人： Amir Lahat , Ronen Ofek , Yoav Kluger , Lior Shabtay
发明人： Amir Lahat , Ronen Ofek , Yoav Kluger , Lior Shabtay
IPC分类号： G06F300
CPC分类号： G06F1/14 , H04L41/0213 , H04L41/5003 , H04L41/5006 , H04L41/5019 , H04L43/0864 , H04L43/087 , H04L43/106
摘要： A mechanism and associated protocol for performing Service Level Agreement (SLA) measurements in a communications network. The measurements obtained are used to perform various SLA parameter calculations such as delay, round trip delay, one way jitter and bandwidth related calculations. SLA measurement request and response messages are stamped with time and bandwidth counters by the client and remote ends of a connection. The resultant data is used to perform the calculation of SLA parameters.
摘要翻译：用于在通信网络中执行服务水平协议（SLA）测量的机制和相关协议。所获得的测量用于执行各种SLA参数计算，例如延迟，往返延迟，单向抖动和带宽相关计算。 SLA测量请求和响应消息由客户端和连接的远端标有时间和带宽计数器。结果数据用于执行SLA参数的计算。

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