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11. 发明授权

US08923114B2 Start-up delay for event-driven virtual link aggregation 有权
标题翻译：事件驱动的虚拟链路聚合的启动延迟
公开(公告)号：US08923114B2
公开(公告)日：2014-12-30
申请号：US14072345
申请日：2013-11-05
申请人： International Business Machines Corporation
发明人： Lei Bao , Gangadhar Hariharan , Tamanna Z. Sait , Venkatesan Selvaraj
IPC分类号： G01R31/08 , H04L12/24 , H04L12/709
CPC分类号： H04L41/0654 , H04L45/245 , Y02D50/30
摘要： Embodiments of the invention relate to virtual link aggregation. One embodiment includes preventing network traffic loss upon rebooting of a first networking device based on: maintaining a first group of networking ports in a first disabled state, determining a link-status of a first link between the first networking device and a second networking device, activating a delay timer for delaying the rebooting of the first network device upon the determination of a first status indication for the first link, and switching at least one of the first group of networking ports to a first enabled state upon expiration of the delay timer.
摘要翻译：本发明的实施例涉及虚拟链路聚合。一个实施例包括：基于以下原因，防止重新启动第一网络设备时的网络流量丢失：将第一组网络端口维持在第一禁用状态，确定第一联网设备和第二网络设备之间的第一链路的链路状态，激活延迟定时器，用于在确定所述第一链路的第一状态指示时延迟所述第一网络设备的重新启动，以及在所述延迟定时器期满时将所述第一组网络端口中的至少一个切换到第一启用状态。

12. 发明申请

US20140211792A1 ACTIVE IP FORWARDING IN AN EVENT DRIVEN VIRTUAL LINK AGGREGATION (VLAG) SYSTEM 有权
标题翻译：在虚拟链路聚合（VLAG）系统中的活动IP转发
公开(公告)号：US20140211792A1
公开(公告)日：2014-07-31
申请号：US13754737
申请日：2013-01-30
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Yuan WX Li , Tamanna Z. Sait , Naveen C. Sekhara , Venkatesan Selvaraj
IPC分类号： H04L12/56
CPC分类号： H04L41/0654 , H04L41/0663 , H04L41/0668 , H04L49/30 , H04L49/552 , H04L49/557 , H04L49/70
摘要： In one embodiment, a networking system includes a first networking switch positioned at a boundary between Layer-2 (L2) and Layer-3 (L3), the first networking switch including a first virtual router redundancy protocol (VRRP) module, a second networking switch connected to the first networking switch via an interswitch link (ISL), the second networking switch being positioned at the boundary between L2 and L3 and including a second VRRP module, and an access switch positioned in L2, the access switch being capable of being connected to the first and second networking switches in a virtual link aggregation (vLAG), the first VRRP module being adapted for performing active internet protocol (IP) forwarding when the second networking switch is not performing active IP forwarding, and the second VRRP module being adapted for performing active IP forwarding when the second networking switch is not performing active IP forwarding.
摘要翻译：在一个实施例中，网络系统包括位于二层（L2）和三层（L3）之间边界的第一网络交换机，第一组网交换机包括第一虚拟路由器冗余协议（VRRP）模块，第二组网交换机通过交换机间链路（ISL）连接到第一组网交换机，第二组网交换机位于L2和L3之间的边界处，并且包括第二VRRP模块和位于L2中的接入交换机，接入交换机能够连接到虚拟链路聚合（vLAG）中的第一和第二组网交换机，所述第一VRRP模块适于在所述第二组网交换机不执行主动IP转发时执行活动因特网协议（IP）转发，并且所述第二VRRP模块为适用于当第二网络交换机不执行主动IP转发时执行主动IP转发。

13. 发明申请

US20140192635A1 START-UP DELAY FOR EVENT-DRIVEN VIRTUAL LINK AGGREGATION 审中-公开
标题翻译：事件驱动的虚拟链路聚合启动延迟
公开(公告)号：US20140192635A1
公开(公告)日：2014-07-10
申请号：US13734654
申请日：2013-01-04
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Lei Bao , Gangadhar Hariharan , Tamanna Z. Sait , Venkatesan Selvaraj
IPC分类号： H04L12/24
CPC分类号： H04L41/0654 , H04L45/245 , Y02D50/30
摘要： Embodiments of the invention relate to virtual link aggregation. One embodiment includes a system including a first aggregation switch. A second aggregation switch is connected to the first aggregation switch with a first link. An access switch is connected to the first aggregation switch with a second link and the second aggregation switch with a third link. The first access switch establishes a first virtual link with the first aggregation switch and the second aggregation switch. A first detection module is connected with the first aggregation switch. The first detection module maintains multiple networking ports in a first disabled state, determines a link-status of the first link, and activates a first event upon the determination of a first status indication for the first link, and switches at least one of the multiple networking ports to a first enabled state upon detecting the first event.
摘要翻译：本发明的实施例涉及虚拟链路聚合。一个实施例包括包括第一聚合开关的系统。第二聚合交换机通过第一链路连接到第一汇聚交换机。接入交换机与具有第二链路的第一聚合交换机连接，第二聚合交换机与第三链路连接。第一接入交换机与第一聚合交换机和第二聚合交换机建立第一虚拟链路。第一检测模块与第一汇聚开关连接。第一检测模块将多个网络端口维持在第一禁用状态，确定第一链路的链路状态，并且在确定第一链路的第一状态指示时激活第一事件，并且将多个网络端口中的至少一个切换在检测到第一事件时将网络端口连接到第一启用状态。

14. 发明申请

US20200053001A1 LOOP AVOIDANCE FOR EVENT-DRIVEN VIRTUAL LINK AGGREGATION 审中-公开
公开(公告)号：US20200053001A1
公开(公告)日：2020-02-13
申请号：US16659103
申请日：2019-10-21
申请人： International Business Machines Corporation
发明人： Tamanna Z. Sait , Venkatesan Selvaraj , Shoou J. Yiu , Yi Xia
IPC分类号： H04L12/705 , H04L12/24 , H04L12/803 , H04L12/891
摘要： Embodiments of the invention relate to virtual link aggregation. One embodiment includes forming one or more virtual links using physical links connecting a first networking element, a second networking element and a third networking element. A first trigger status indication is used for blocking network traffic for avoiding traffic loops occurring over the one or more virtual links.

15. 发明申请

US20200028892A1 DNS RESOLUTION OF INTERNAL TENANT-SPECIFIC DOMAIN ADDRESSES IN A MULTI-TENANT COMPUTING ENVIRONMENT 审中-公开
公开(公告)号：US20200028892A1
公开(公告)日：2020-01-23
申请号：US16585249
申请日：2019-09-27
申请人： International Business Machines Corporation
发明人： Ashish Kapur , Tamanna Z. Sait , Zi Jin Tao , Lu Zhang
IPC分类号： H04L29/08 , H04L29/12
摘要： A method and associated systems for a multi-tenant DNS mechanism. A multi-tenant computing environment hosts multiple private overlay networks, each of which comprises one tenant's domain. A multi-tenant DNS agent receives a DNS request to resolve a domain address located within the multi-tenant environment. The agent examines a special record within the request to determine whether the request requires resolving the domain address to an internal tenant-specific network identifier within a tenant's private network. The agent then forwards the request to a DNS server, notifying the server whether the requested address resolution is tenant-specific. If the request is not tenant-specific, the server performs a conventional DNS lookup. But if the request is tenant-specific, the DNS server instead performs a lookup into a tenant-specific local database that allows the domain address to be resolved to an internal address visible only within the multi-tenant computing environment.

16. 发明授权

US10511519B2 Loop avoidance for event-driven virtual link aggregation 有权
公开(公告)号：US10511519B2
公开(公告)日：2019-12-17
申请号：US15400902
申请日：2017-01-06
申请人： International Business Machines Corporation
发明人： Tamanna Z. Sait , Venkatesan Selvaraj , Shoou J. Yiu , Yi Xia
IPC分类号： H04L12/705 , H04L12/891 , H04L12/803 , H04L12/24
摘要： Embodiments of the invention relate to virtual link aggregation. One embodiment includes forming one or more virtual links using physical links connecting a first networking element, a second networking element and a third networking element. A first trigger status indication is used for blocking network traffic for avoiding traffic loops occurring over the one or more virtual links.

17. 发明授权

US09001825B2 Virtual link aggregation using state machine 有权
标题翻译：使用状态机的虚拟链路聚合
公开(公告)号：US09001825B2
公开(公告)日：2015-04-07
申请号：US13734214
申请日：2013-01-04
申请人： International Business Machines Corporation
发明人： Tamanna Z. Sait , Venkatesan Selvaraj , Shoou Yiu , Yu H. Guo
IPC分类号： H04L12/28 , H04L12/935 , H04L12/709
CPC分类号： H04L49/30 , H04L45/245
摘要： Physical links between an access switch and a pair aggregation switches are aggregated into a virtual link aggregation group (vLAG). Each aggregation switch is a local switch to itself and a remote switch to the other aggregation switch. Each aggregation switch maintains a state machine including initialization, local-up, remote-up, and formed states. In the initialization state, the physical link between the access switch and each aggregation switch is down, and the vLAG is down. In the local-up state, just the physical link between the access switch and the local switch is up, and the vLAG is down. In the remote-up state, just the physical link between the access switch and the remote switch is up, and the vLAG is down. In the formed state, the physical link between the access switch and each aggregation switch is up, and the vLAG is up.
摘要翻译：接入交换机和对聚合交换机之间的物理链路聚合成虚拟链路聚合组（vLAG）。每个聚合交换机是本身的本地交换机，另一个是汇聚交换机的远程交换机。每个聚合交换机维护一个状态机，包括初始化，本地化，远程和形成状态。在初始化状态下，接入交换机与各聚合交换机之间的物理链路断开，vLAG关闭。在本地状态下，只有接入交换机和本地交换机之间的物理连接已经关闭，vLAG关闭。在远程状态下，只有接入交换机和远程交换机之间的物理连接已经启动，并且vLAG关闭。在形成状态下，接入交换机与每个汇聚交换机之间的物理连接已经启动，vLAG已经启动。

18. 发明申请

US20150055658A1 REFLECTIVE RELAY PROCESSING ON LOGICAL PORTS FOR CHANNELIZED LINKS IN EDGE VIRTUAL BRIDGING SYSTEMS 有权
标题翻译：边缘虚拟桥接系统中通道链路逻辑端口的反射继电器处理
公开(公告)号：US20150055658A1
公开(公告)日：2015-02-26
申请号：US13971636
申请日：2013-08-20
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Vasmi M. Abidi , Xiang Hui Dong , Tamanna Z. Sait , Yun Sun , Zheng Dong Zhu
IPC分类号： H04L12/931
CPC分类号： H04L12/465 , Y02D30/30 , Y02D30/32
摘要： Embodiments of the invention relate to reflective relay (RR) processing on logical ports for channelized links in edge virtual bridging (EVB) systems. One embodiment includes providing a virtual edge bridge (VEB) mode and a virtual Ethernet port aggregator (VEPA) mode in an EVB system on a same port of a physical switch. RR capability per channel is negotiated between a server and the physical switch in the EVB system. RR per channel is supported on the physical switch of the EVB system using RR setting information per channel.
摘要翻译：本发明的实施例涉及在边缘虚拟桥接（EVB）系统中用于信道化链路的逻辑端口上的反射中继（RR）处理。一个实施例包括在物理交换机的同一端口上的EVB系统中提供虚拟边缘网桥（VEB）模式和虚拟以太网端口聚合（VEPA）模式。在EVB系统中，服务器与物理交换机之间协商每个通道的RR能力。 EVB系统的物理交换机每个通道使用RR设置信息支持每个通道的RR。

19. 发明申请

US20140192632A1 LOOP AVOIDANCE FOR EVENT-DRIVEN VIRTUAL LINK AGGREGATION 有权
标题翻译：用于事件驱动的虚拟链路聚合的环路避免
公开(公告)号：US20140192632A1
公开(公告)日：2014-07-10
申请号：US14089660
申请日：2013-11-25
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Tamanna Z. Sait , Venkatesan Selvaraj , Shoou J. Yiu , Yi Xia
IPC分类号： H04L12/24 , H04L12/705
CPC分类号： H04L45/18 , H04L41/0668 , H04L47/125 , H04L47/41 , Y02D50/30
摘要： Embodiments of the invention relate to virtual link aggregation. One embodiment includes forming one or more virtual links using physical links connecting a first networking element, a second networking element and a third networking element. A first trigger status indication is used for blocking network traffic for avoiding traffic loops occurring over the one or more virtual links.
摘要翻译：本发明的实施例涉及虚拟链路聚合。一个实施例包括使用连接第一联网元件，第二联网元件和第三网络元件的物理链路来形成一个或多个虚拟链路。第一触发状态指示用于阻止网络流量，以避免在一个或多个虚拟链路上发生的流量环路。

20. 发明授权

US11095711B2 DNS Resolution of internal tenant-specific domain addresses in a multi-tenant computing environment 有权
公开(公告)号：US11095711B2
公开(公告)日：2021-08-17
申请号：US16585249
申请日：2019-09-27
申请人： International Business Machines Corporation
发明人： Ashish Kapur , Tamanna Z. Sait , Zi Jin Tao , Lu Zhang
IPC分类号： H04L29/08 , H04L29/12
摘要： A method and associated systems for a multi-tenant DNS mechanism. A multi-tenant computing environment hosts multiple private overlay networks, each of which comprises one tenant's domain. A multi-tenant DNS agent receives a DNS request to resolve a domain address located within the multi-tenant environment. The agent examines a special record within the request to determine whether the request requires resolving the domain address to an internal tenant-specific network identifier within a tenant's private network. The agent then forwards the request to a DNS server, notifying the server whether the requested address resolution is tenant-specific. If the request is not tenant-specific, the server performs a conventional DNS lookup. But if the request is tenant-specific, the DNS server instead performs a lookup into a tenant-specific local database that allows the domain address to be resolved to an internal address visible only within the multi-tenant computing environment.

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