公开(公告)号：US06289017B1

公开(公告)日：2001-09-11

申请号：US09087783

申请日：1998-05-29

申请人： Sarit Shani ,  Yoram Shamir ,  Miki Kenneth ,  Haim Rochberger

发明人： Sarit Shani ,  Yoram Shamir ,  Miki Kenneth ,  Haim Rochberger

IPC分类号： H01L1256

CPC分类号： H04L12/4608 ,  H04L2012/5617 ,  H04L2012/5619 ,  H04L2012/563 ,  H04Q11/0478 ,  H04Q2213/13103 ,  H04Q2213/13164 ,  H04Q2213/13166 ,  H04Q2213/13167 ,  H04Q2213/13204 ,  H04Q2213/1329 ,  H04Q2213/1336 ,  H04Q2213/1338

摘要： A method of providing redundancy and load sharing among multiple LECSs in an ATM network. The method creates and maintains a plurality of lists on each of the switches. Each list is an ordered set of LECSs that combine to create an active LECS list. The network is divided into a plurality of groups wherein each group is assigned one of the active LECS lists. The order of each active LECS list is unique in that no two groups have the same order of LECS. The first LECS on each list has the highest priority and is always the first choice when a request to join a VLAN is received from one of the connected LECs. If the primary lECS fails or cannot be reached for any reason, the switches utilize the second LECS on the list. Splitting up the network into multiple groups and assigning different lists serves to provide load sharing among the LECS. In the event the currently active LECS fails, the next on the list takes overt thus providing redundancy.

摘要翻译： 一种在ATM网络中的多个LECS之间提供冗余和负载共享的方法。 该方法在每个交换机上创建和维护多个列表。 每个列表都是一组有序的LECS，它们组合起来创建一个活动的LECS列表。 网络被分成多个组，其中每个组被分配了一个活动LECS列表。 每个活动LECS列表的顺序是唯一的，因为没有两个组具有相同的LECS顺序。 每个列表上的第一个LECS具有最高优先级，并且当从一个连接的LEC接收到加入VLAN的请求时，始终是第一选择。 如果主要的LECS出现故障或由于任何原因无法访问，交换机将使用列表中的第二个LECS。 将网络分为多个组并分配不同的列表，用于在LECS之间提供负载共享。 在当前活动的LECS发生故障的情况下，列表中的下一个将接管，从而提供冗余。

公开(公告)号：US06205146B1

公开(公告)日：2001-03-20

申请号：US09086423

申请日：1998-05-28

申请人： Haim Rochberger ,  Sarit Shani ,  Meir Morgenstern ,  David Margulis

发明人： Haim Rochberger ,  Sarit Shani ,  Meir Morgenstern ,  David Margulis

IPC分类号： H04L1228

CPC分类号： H04L45/122 ,  H04L45/10

摘要： A method of determining an efficient route to a well known address that is particularly applicable to networks that do not have the capability of source routing for calculating routes to specific addresses such as ATM networks based on the IISP protocol. The well known address may represent any entity in the network that provides distributed services (e.g., network server applications) that are to be shared among many nodes and applications on the network, such as LECSs. The method of functions to automatically and dynamically register ‘well known’ addresses on the ports of each node that implements the invention. This permits applications on the network to route to the destination in the shortest possible path thus utilizing network resources in an efficient manner. If there is more than one location with the well known address, e.g., a redundant LECSs in the network, or more than one route to the location then the optimum location will be the one routed to. An optimum location can be determined using any suitable criteria to determine the optimum route to a LECS such as distance, hop count, cost function, link sum, link capacity, etc.

摘要翻译： 确定到公知地址的有效路由的方法，其特别适用于不具有基于IISP协议的诸如ATM网络的特定地址的路由的源路由能力的网络。 众所周知的地址可以表示网络中提供分布式服务（例如，网络服务器应用）的任何实体，其将被许多节点和网络上的应用（例如LECS）共享。 在实现本发明的每个节点的端口上自动和动态地注册“公知”地址的功能的方法，这允许网络上的应用以尽可能最短的路径路由到目的地，从而以有效的方式利用网络资源。 如果存在多个具有众所周知的地址的位置，例如，网络中的冗余LECS，或者到该位置的多于一条路由，那么最佳位置将是路由到的最佳位置。可以使用任何适当的 确定到LECS的最佳路由的标准，例如距离，跳数，成本函数，链路和，链路容量等。

公开(公告)号：US06223149B1

公开(公告)日：2001-04-24

申请号：US09085918

申请日：1998-05-28

申请人： David Margulis ,  Sarit Shani ,  Haim Rochberger ,  Gonen Ziv-Av

发明人： David Margulis ,  Sarit Shani ,  Haim Rochberger ,  Gonen Ziv-Av

IPC分类号： H04J116

CPC分类号： H04L12/4608 ,  H04L2012/5617 ,  H04L2012/5627 ,  H04L2012/5651 ,  H04Q11/0478

摘要： A method of providing redundancy in a LAN Emulation network in the event an LES fails. The method is light in that it does not require complicated database synchronizations between LECSs and their associated complex message protocol exchanges. The method comprises defining a plurality of LESs per ELAN, but permitting only one of the LESs to be active at any one moment in time. All the LECSs are configured with the same Topology Database which include the all the potential LESs for each ELAN. The LECSs try to connect to each LES and the results are logged. The operative LESs having the highest priority is chosen as the active LES whereby all LECs get assigned to the active LES. When the active LES fails the LECs attempt a new connection to LECs. The LECs assigns the LECs to another operative LES in the database list. All the LECs previously connected to the failed LES, are attached to the new LES assigned by the LECs and communications are reestablished with the new LES. Splits are handles by having the LECs choose the LES with the highest priority to be the new active LES and sending a message to all the other LESs instructing them to disconnect their attached LECs. This causes the LECs to re-attach to the active LES.

摘要翻译： 在LES发生故障的情况下，在LAN仿真网络中提供冗余的方法。 该方法很简单，因为它不需要LECS与其相关联的复杂消息协议交换之间的复杂数据库同步。 该方法包括定义每个ELAN的多个LES，但是在任何一个时刻只允许一个LES活动。 所有LECS都配置有相同的拓扑数据库，其中包括每个ELAN的所有潜在的LES。 LECS尝试连接到每个LES并记录结果。 具有最高优先级的操作LES被选择为活动LES，由此所有LEC被分配给活动LES。 当活动的LES失败时，LEC尝试与LEC的新连接。 LEC将LEC分配给数据库列表中的另一个可操作的LES。 以前连接到失败的LES的所有LEC都附加到由LEC分配的新的LES，并且通信被重新建立与新的LES。 通过使LEC选择具有最高优先级的LES作为新的活动LES并向所有其他LES发送消息以指示它们断开其连接的LEC的分离是分开的。 这导致LEC重新附加到活动的LES。

公开(公告)号：US06269076B1

公开(公告)日：2001-07-31

申请号：US09086104

申请日：1998-05-28

申请人： Yoram Shamir ,  Sharon Barkai ,  Sarit Shani

发明人： Yoram Shamir ,  Sharon Barkai ,  Sarit Shani

IPC分类号： G01R3108

CPC分类号： H04L45/22 ,  H04L41/0213 ,  H04L41/0654 ,  H04L41/0816 ,  H04L41/082 ,  H04L41/12 ,  H04L43/0811 ,  H04L45/02 ,  H04L45/10 ,  H04L45/28

摘要： A method for creating and resolving split VLANs in ATM networks. The method utilizes a Network Management System (NMS) and a standard management protocol such as SNMP. The method monitors the network by continuously polling all the devices in the network. Status related information collected by the NMS is used to construct a physical and logical topology of the network. In response to the detection of one or more physical splits in the network, the NMS creates one or more corresponding logical splits in the network by splitting one or more VLANs. In the case of two split portions, the split VLAN can be created if a redundant LES and second LECS are located on the side of the split which does not include the primary LES. The second LECS is configured to use the address of the redundant LES in replying to requests to join an ELAN from the disconnected LECs. The repair of the physical split is detected by the NMS and, in response, the NMS modifies the databases of all the LECS in the ELAN so that the same primary LES address is returned to any LEC requesting to join an ELAN. LECs previously attached to the redundant LES are disconnected and subsequently attached to the primary LES.

摘要翻译： 一种在ATM网络中创建和解决分割VLAN的方法。 该方法采用网管系统（NMS）和SNMP等标准管理协议。 该方法通过连续轮询网络中的所有设备来监视网络。 NMS收集的状态相关信息用于构建网络的物理和逻辑拓扑。 响应于网络中的一个或多个物理分裂的检测，NMS通过拆分一个或多个VLAN来在网络中创建一个或多个对应的逻辑划分。 在两个分割部分的情况下，如果冗余LES和第二LECS位于不包括主LES的分割侧，则可以创建分割VLAN。 第二个LECS被配置为使用冗余LES的地址来回应从断开的LEC中加入ELAN的请求。 物理分裂的修复由NMS检测，作​​为响应，NMS修改ELAN中所有LECS的数据库，以便将相同的主LES地址返回到任何LEC请求加入ELAN。 先前连接到冗余LES的LEC已断开连接，随后连接到主LES。