公开(公告)号：US07969867B2

公开(公告)日：2011-06-28

申请号：US12336469

申请日：2008-12-16

Applicant: Eric C. Rosen ,  Clarence Filsfils ,  James Neil Guichard ,  Keyur P. Patel ,  Pradosh Kumar Mohapatra

Inventor： Eric C. Rosen ,  Clarence Filsfils ,  James Neil Guichard ,  Keyur P. Patel ,  Pradosh Kumar Mohapatra

IPC: G01R31/08 ,  H04L12/28

CPC classification number: H04L45/22 ,  H04L45/02 ,  H04L45/28

Abstract: A method is provided for generating a backup route. Here, a route and a route distinguisher type associated with the route are received and a backup route is generated based on attributes of the route. A particular backup route distinguisher type that is associated with the route distinguisher type is assigned to the backup route. The backup route with the backup route distinguisher type are then advertised. Another method is provided that identifies the backup route. When the route and its route distinguisher type are received from the advertisement, an identification is made as to whether the route distinguisher type is assigned to a backup route. The route may then be designated as a backup route based on the identification.

Abstract translation: 提供了一种用于生成备份路由的方法。 这里，接收与路由相关联的路由和路由识别器类型，并且基于路由的属性生成备份路由。 与路由识别器类型相关联的特定备份路由识别器类型被分配给备份路由。 然后通告备份路由标识符类型的备份路由。 提供了另一种标识备份路由的方法。 当从广告接收到路由和路由识别器类型时，确定路由识别器类型是否被分配给备份路由。 然后可以基于识别将路由指定为备用路由。

公开(公告)号：US07706298B2

公开(公告)日：2010-04-27

申请号：US11613804

申请日：2006-12-20

Applicant: Rex Fernando ,  Dheerendra Talur ,  Pradosh Kumar Mohapatra ,  Paul A. Jensen

Inventor： Rex Fernando ,  Dheerendra Talur ,  Pradosh Kumar Mohapatra ,  Paul A. Jensen

IPC: H04L12/56

CPC classification number: H04L45/54 ,  H04L45/02

Abstract: A method of selecting routing tables to include in a network line card consists of determining dependencies of local routes on remote routes using a reference count on prefixes, and selectively downloading remote routes when resolution of a route has a dependency on a remote route. In one embodiment, only remote routes that are needed to forward traffic are downloaded to a network line card.

Abstract translation: 选择路由表以包括在网络线卡中的方法包括使用前缀上的引用计数来确定在远程路由上的本地路由的依赖性，以及当路由的解析对远程路由具有依赖性时，选择性地下载远程路由。 在一个实施例中，仅将转发业务所需的远程路由下载到网络线卡。

公开(公告)号：US07916729B2

公开(公告)日：2011-03-29

申请号：US12241445

申请日：2008-09-30

Applicant: Pradosh Kumar Mohapatra ,  Clarence Filsfils ,  James Neil Guichard ,  Eric Rosen

Inventor： Pradosh Kumar Mohapatra ,  Clarence Filsfils ,  James Neil Guichard ,  Eric Rosen

IPC: H04L12/28

CPC classification number: H04L45/22 ,  H04L12/4641 ,  H04L45/04

Abstract: A virtual private network (VPN) is formed with a pair of autonomous systems (ASes) connected by each having at least two autonomous system border routers (ASBRs) connected to the corresponding ASBRs at the other AS, referred to as an Option B VPN-IPv4 network. Route reflectors (RRs) only reflect the best Border Gateway Protocol (BGP) paths, providing no backup BGP paths for fast convergence. Advantageously, an automatic route distinguisher (RD) rewrite component at the ASBRs creates unique prefixes and advertises the original RD as transitive attribute in an update message to external AS peers. Each RD gets mapped to another unique prefix at the ASBR and also that two ASBRs will create different unique prefixes. Thus, the route reflector sees different prefixes and reflects all of them. The ingress provider edge (PE) router can import the prefixes and correctly obtain the alternate paths for fast convergence.

Abstract translation: 虚拟专用网络（VPN）形成有一对自主系统（AS），每个自治系统（AS）连接有至少两个自主系统边界路由器（ASBR），这两个自治系统边界路由器（ASBR）连接到另一个AS的对应ASBR，称为选项B VPN- IPv4网络。 路由反射器（RR）仅反映最佳的边界网关协议（BGP）路径，不提供用于快速收敛的备份BGP路径。 有利的是，ASBR上的自动路由识别器（RD）重写组件创建唯一的前缀，并将原始RD作为更新消息中的传递属性通告给外部AS对等体。 每个RD映射到ASBR的另一个唯一前缀，并且两个ASBR将创建不同的唯一前缀。 因此，路由反射器看到不同的前缀并且反映所有前缀。 入口提供商边缘（PE）路由器可以导入前缀并正确获取备用路径以实现快速收敛。

公开(公告)号：US20100150020A1

公开(公告)日：2010-06-17

申请号：US12336469

申请日：2008-12-16

Applicant: Eric C. Rosen ,  Clarence Filsfils ,  James Neil Guichard ,  Keyur P. Patel ,  Pradosh Kumar Mohapatra

Inventor： Eric C. Rosen ,  Clarence Filsfils ,  James Neil Guichard ,  Keyur P. Patel ,  Pradosh Kumar Mohapatra

IPC: H04L12/24

CPC classification number: H04L45/22 ,  H04L45/02 ,  H04L45/28

Abstract: A method is provided for generating a backup route. Here, a route and a route distinguisher type associated with the route are received and a backup route is generated based on attributes of the route. A particular backup route distinguisher type that is associated with the route distinguisher type is assigned to the backup route. The backup route with the backup route distinguisher type are then advertised. Another method is provided that identifies the backup route. When the route and its route distinguisher type are received from the advertisement, an identification is made as to whether the route distinguisher type is assigned to a backup route. The route may then be designated as a backup route based on the identification.

Abstract translation: 提供了一种用于生成备份路由的方法。 这里，接收与路由相关联的路由和路由识别器类型，并且基于路由的属性生成备份路由。 与路由识别器类型相关联的特定备份路由识别器类型被分配给备份路由。 然后通告备份路由标识符类型的备份路由。 提供了另一种标识备份路由的方法。 当从广告接收到路由和路由识别器类型时，确定路由识别器类型是否被分配给备份路由。 然后可以基于识别将路由指定为备用路由。

公开(公告)号：US20100080222A1

公开(公告)日：2010-04-01

申请号：US12241445

申请日：2008-09-30

Applicant: Pradosh Kumar Mohapatra ,  Clarence Filsfils ,  James Neil Guichard ,  Eric Rosen

Inventor： Pradosh Kumar Mohapatra ,  Clarence Filsfils ,  James Neil Guichard ,  Eric Rosen

IPC: H04L12/56

CPC classification number: H04L45/22 ,  H04L12/4641 ,  H04L45/04

Abstract: A virtual private network (VPN) is formed with a pair of autonomous systems (ASes) connected by each having at least two autonomous system border routers (ASBRs) connected to the corresponding ASBRs at the other AS, referred to as an Option B VPN-IPv4 network. Route reflectors (RRs) only reflect the best Border Gateway Protocol (BGP) paths, providing no backup BGP paths for fast convergence. Advantageously, an automatic route distinguisher (RD) rewrite component at the ASBRs creates unique prefixes and advertises the original RD as transitive attribute in an update message to external AS peers. Each RD gets mapped to another unique prefix at the ASBR and also that two ASBRs will create different unique prefixes. Thus, the route reflector sees different prefixes and reflects all of them. The ingress provider edge (PE) router can import the prefixes and correctly obtain the alternate paths for fast convergence.

Abstract translation: 虚拟专用网络（VPN）形成有一对自主系统（AS），每个自治系统（AS）连接有至少两个自主系统边界路由器（ASBR），这两个自治系统边界路由器（ASBR）连接到另一个AS的对应ASBR，称为选项B VPN- IPv4网络。 路由反射器（RR）仅反映最佳的边界网关协议（BGP）路径，不提供用于快速收敛的备份BGP路径。 有利的是，ASBR上的自动路由识别器（RD）重写组件创建唯一的前缀，并将原始RD作为更新消息中的传递属性通告给外部AS对等体。 每个RD映射到ASBR的另一个唯一前缀，并且两个ASBR将创建不同的唯一前缀。 因此，路由反射器看到不同的前缀并且反映所有前缀。 入口提供商边缘（PE）路由器可以导入前缀并正确获取备用路径以实现快速收敛。

公开(公告)号：US20110032945A1

公开(公告)日：2011-02-10

申请号：US12536427

申请日：2009-08-05

Applicant: John Joseph Mullooly ,  Ali Sajassi ,  Pradosh Kumar Mohapatra ,  Samer M. Salam

Inventor： John Joseph Mullooly ,  Ali Sajassi ,  Pradosh Kumar Mohapatra ,  Samer M. Salam

IPC: H04L12/56

CPC classification number: H04L49/15 ,  H04L45/04 ,  H04L45/58

Abstract: In an embodiment, a method of signaling status at a routing device is provided. In this method, the routing device establishes an inter-chassis control plane channel session with a remote routing device. Here, the routing device and the remote routing device are linked to a multi-homed routing device. The routing device then synchronizes with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device. The state of the link is thereafter advertised by way of Border Gateway Protocol (BGP). Additionally, a method of discovering inter-chassis communication peers via BGP between the first and remote routing devices is provided.

Abstract translation: 在一个实施例中，提供了一种在路由设备处发信号通知状态的方法。 在该方法中，路由设备与远程路由设备建立机柜间控制平面信道会话。 这里，路由设备和远程路由设备链接到多宿主路由设备。 然后，路由设备通过机架间控制平面信道会话与远程路由设备同步，以识别从路由设备到多归属路由设备的链路的状态。 之后通过边界网关协议（BGP）通告链路的状态。 另外，提供了一种通过第一和远程路由设备之间的BGP发现机架间通信对等体的方法。

公开(公告)号：US20070153699A1

公开(公告)日：2007-07-05

申请号：US11613804

申请日：2006-12-20

Applicant: Rex Fernando ,  Dheerendra Talur ,  Pradosh Kumar Mohapatra ,  Paul A. Jensen

Inventor： Rex Fernando ,  Dheerendra Talur ,  Pradosh Kumar Mohapatra ,  Paul A. Jensen

IPC: H04J3/14

CPC classification number: H04L45/54 ,  H04L45/02

Abstract: A method of selecting routing tables to include in a network line card consists of determining dependencies of local routes on remote routes using a reference count on prefixes, and selectively downloading remote routes when resolution of a route has a dependency on a remote route. In one embodiment, only remote routes that are needed to forward traffic are downloaded to a network line card.

Abstract translation: 选择路由表以包括在网络线卡中的方法包括使用前缀上的引用计数来确定在远程路由上的本地路由的依赖性，以及当路由的解析对远程路由具有依赖性时，选择性地下载远程路由。 在一个实施例中，仅将转发业务所需的远程路由下载到网络线卡。