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1. 发明授权

US08867334B2 Efficient convergence of grouped VPN prefixes 有权
标题翻译：分组VPN前缀的高效收敛
公开(公告)号：US08867334B2
公开(公告)日：2014-10-21
申请号：US13338980
申请日：2011-12-28
申请人： Pranav Dharwadkar , Yuri Tsier , Clarence Filsfils , John Bettink , Pradosh Mohapatra
发明人： Pranav Dharwadkar , Yuri Tsier , Clarence Filsfils , John Bettink , Pradosh Mohapatra
IPC分类号： G06F11/00 , H04L12/26 , H04L12/28 , H04L12/56 , G06F11/16 , H04L12/46
CPC分类号： H04L12/4641
摘要： In one embodiment, a list of border node next hop options is maintained in a memory. The list of border node next hop options includes one or more of border nodes that may be utilized to reach one or more prefixes. An index value is associated with each border node of the list of border node next hop options. A list of labels is also maintained in the memory. The index value of each border node is associated with a corresponding label for a path to reach that border node. When a change to the one or more border nodes is detected, the list of border node next hop options is updated to remove a border node. However, a label for the path to reach the border node is maintained in the list of labels for at least a period of time.
摘要翻译：在一个实施例中，边界节点下一跳选项的列表被保存在存储器中。边界节点下一跳选项的列表包括可用于达到一个或多个前缀的一个或多个边界节点。索引值与边界节点下一跳选项列表中的每个边界节点相关联。内存中也保留了标签列表。每个边界节点的索引值与到达该边界节点的路径的相应标签相关联。当检测到一个或多个边界节点的更改时，更新边界节点下一跳选项列表以删除边界节点。然而，到达边界节点的路径的标签在标签列表中保持至少一段时间。

2. 发明申请

US20100215047A1 SUBSETS OF THE FORWARD INFORMATION BASE (FIB) DISTRIBUTED AMONG LINE CARDS IN A SWITCHING DEVICE 有权
标题翻译：在切换设备中的线卡上分配的前向信息库（FIB）的附件
公开(公告)号：US20100215047A1
公开(公告)日：2010-08-26
申请号：US12390391
申请日：2009-02-20
申请人： Clarence Filsfils , Pradosh Mohapatra , Dheerendra Talur , John H. W. Bettink , Pranav Dharwadkar , David Delano Ward
发明人： Clarence Filsfils , Pradosh Mohapatra , Dheerendra Talur , John H. W. Bettink , Pranav Dharwadkar , David Delano Ward
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L45/38 , H04L45/54 , H04L49/3009
摘要： Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with subsets of the Forward Information Base (FIB) distributed among line cards in a switching device; especially wherein one or more of the line cards does not contain the complete FIB, and this line card forwards packets, for which it does not have the forwarding information, to another line card which has the forwarding information for the packet.
摘要翻译：公开了尤其涉及在交换设备中的线路卡之间分配的前向信息库（FIB）的子集的方法，装置，计算机存储介质，机制和装置; 特别是其中一个或多个线路卡不包含完整的FIB，并且该线路卡将不具有转发信息的分组转发到具有用于分组的转发信息的另一线路卡。

3. 发明申请

US20080084881A1 Techniques for virtual private network fast convergence 有权
标题翻译：虚拟专网快速融合技术
公开(公告)号：US20080084881A1
公开(公告)日：2008-04-10
申请号：US11546054
申请日：2006-10-10
申请人： Pranav Dharwadkar , Ramanan Subramanian
发明人： Pranav Dharwadkar , Ramanan Subramanian
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L12/4641 , H04L45/50 , H04L45/54 , H04L45/7453
摘要： An apparatus for VPN fast convergence in MPLS networks is disclosed. The apparatus comprises a first memory portion, a second memory portion, and a first logic for programming the memory portions. The first memory portion comprises a plurality of first data structures, where each of the plurality of first data structures includes an IGP label and an adjacency identifier that identifies one of a plurality of outgoing interfaces associated with the apparatus, where each IGP label indicates a Label Switched Path (LSP) through a network. The second memory portion comprises a plurality of second data structures, where each of the plurality of second data structures includes a network address identifier, a VPN label associated with the network address identifier, and a pointer that indicates one of the plurality of first data structures in the first memory portion, where each VPN label identifies a VPN that is reachable over the network.
摘要翻译：公开了一种用于MPLS网络中VPN快速收敛的设备。该装置包括第一存储器部分，第二存储器部分和用于对存储器部分进行编程的第一逻辑。第一存储器部分包括多个第一数据结构，其中多个第一数据结构中的每一个包括IGP标签和标识与该设备相关联的多个输出接口中的一个的相邻标识符，其中每个IGP标签指示标签交换路径（LSP）通过网络。第二存储器部分包括多个第二数据结构，其中多个第二数据结构中的每一个包括网络地址标识符，与网络地址标识符相关联的VPN标签，以及指示多个第一数据结构之一的指针在第一个存储器部分中，每个VPN标签标识通过网络可达的VPN。

4. 发明授权

US08194664B2 Two-level load-balancing of network traffic over an MPLS network 有权
标题翻译：网络流量在MPLS网络上的两级负载均衡
公开(公告)号：US08194664B2
公开(公告)日：2012-06-05
申请号：US11546053
申请日：2006-10-10
申请人： Pranav Dharwadkar
发明人： Pranav Dharwadkar
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L12/4641 , H04L45/00 , H04L45/22 , H04L45/50 , H04L45/7453 , H04L47/10 , H04L47/125
摘要： An apparatus comprising three memory portions and logic for programming the memory portions is presented. The first memory portion comprises a plurality of first data structures, each which includes an IGP label and an adjacency identifier that identifies one of a plurality of outgoing interfaces in the network element. The second memory portion comprises a plurality of IGP load-halancing entries, each of which includes two or more reference values that point to two or more of the plurality of lirsi data structures. The third memory portion comprises a plurality of BGP load-balancing entries, each of which includes an index value and a pointer. The fourth memory portion comprises a plurality of second data structures, each of which includes a network address identifier and a unique value associated with two or more of the plurality of BGP load-balancing entries.
摘要翻译：提出了包括三个存储器部分和用于对存储器部分进行编程的逻辑的装置。第一存储器部分包括多个第一数据结构，每个第一数据结构包括IGP标签和标识网络元件中的多个输出接口之一的邻接标识符。第二存储器部分包括多个IGP加载偏移条目，每个条目包括指向多个lirsi数据结构中的两个或更多个的两个或更多个参考值。第三存储器部分包括多个BGP负载平衡条目，每个条目包括索引值和指针。第四存储器部分包括多个第二数据结构，每个第二数据结构包括网络地址标识符和与多个BGP负载平衡条目中的两个或更多个相关联的唯一值。

5. 发明申请

US20080084880A1 Two-level load-balancing of network traffic over an MPLS network 有权
标题翻译：网络流量在MPLS网络上的两级负载均衡
公开(公告)号：US20080084880A1
公开(公告)日：2008-04-10
申请号：US11546053
申请日：2006-10-10
申请人： Pranav Dharwadkar
发明人： Pranav Dharwadkar
IPC分类号： H04L12/56
CPC分类号： H04L12/4641 , H04L45/00 , H04L45/22 , H04L45/50 , H04L45/7453 , H04L47/10 , H04L47/125
摘要： An apparatus for two-level load-balancing in MPLS networks is disclosed. The apparatus comprises a first memory portion, a second memory portion, a third memory portion, a fourth memory portion, and logic for programming the memory portions. The first memory portion comprises a plurality of first data structures, where each of the plurality of first data structures includes an IGP label and an adjacency identifier that identifies one of a plurality of outgoing interfaces in the network element, where each IGP label stored in any one of the plurality of first data structures indicates an LSP through the MPLS network. The second memory portion comprises a plurality of IGP load-balancing entries, where each of the plurality of IGP load-balancing entries includes two or more reference values that point to two or more of the plurality of first data structures, and where any two or more IGP labels stored in any two or more of the plurality of first data structures, which are pointed to by any one of the plurality of IGP load-balancing entries, indicate two or more LSPs that all lead to a specific egress network element in the network. For supporting non-VPN traffic, the third memory portion comprises a plurality of BGP load-balancing entries, where each of the plurality of BGP load-balancing entries includes an index value and a pointer that indicates one of the plurality of IGP load-balancing entries. The fourth memory portion comprises a plurality of second data structures, where each of the plurality of second data structures includes a network address identifier and a unique value associated with two or more of the plurality of BGP load-balancing entries.
摘要翻译：公开了一种用于MPLS网络中两级负载平衡的设备。该装置包括第一存储器部分，第二存储器部分，第三存储器部分，第四存储器部分和用于对存储器部分进行编程的逻辑。第一存储器部分包括多个第一数据结构，其中多个第一数据结构中的每一个包括IGP标签和标识网络元件中的多个输出接口之一的相邻标识符，其中每个IGP标签存储在任何多个第一数据结构中的一个表示通过MPLS网络的LSP。第二存储器部分包括多个IGP负载平衡条目，其中多个IGP负载平衡条目中的每一个包括指向多个第一数据结构中的两个或更多个的两个或更多个参考值，并且其中任何两个或存储在多个第一数据结构中的任何两个或多个第一数据结构中的多个IGP负载平衡条目中的任何一个指示的更多IGP标签表示两个或更多个LSP都全部导致在该IGP负载均衡条目中的特定出口网络元件网络。为了支持非VPN流量，第三存储器部分包括多个BGP负载平衡条目，其中多个BGP负载平衡条目中的每一个包括索引值和指示多个IGP负载均衡中的一个的指针条目。第四存储器部分包括多个第二数据结构，其中多个第二数据结构中的每一个包括网络地址标识符和与多个BGP负载平衡条目中的两个或更多个相关联的唯一值。

6. 发明授权

US07826369B2 Subsets of the forward information base (FIB) distributed among line cards in a switching device 有权
标题翻译：在交换设备中的线路卡之间分配的前向信息库（FIB）的子集
公开(公告)号：US07826369B2
公开(公告)日：2010-11-02
申请号：US12390391
申请日：2009-02-20
申请人： Clarence Filsfils , Pradosh Mohapatra , Dheerendra Talur , John H. W. Bettink , Pranav Dharwadkar , David Delano Ward
发明人： Clarence Filsfils , Pradosh Mohapatra , Dheerendra Talur , John H. W. Bettink , Pranav Dharwadkar , David Delano Ward
IPC分类号： G01R31/08 , H04L12/50 , H04L12/28
CPC分类号： H04L45/00 , H04L45/38 , H04L45/54 , H04L49/3009
摘要： Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with subsets of the Forward Information Base (FIB) distributed among line cards in a switching device; especially wherein one or more of the line cards does not contain the complete FIB, and this line card forwards packets, for which it does not have the forwarding information, to another line card which has the forwarding information for the packet.
摘要翻译：公开了尤其涉及在交换设备中的线路卡之间分配的前向信息库（FIB）的子集的方法，装置，计算机存储介质，机制和装置; 特别是其中一个或多个线路卡不包含完整的FIB，并且该线路卡将不具有转发信息的分组转发到具有用于分组的转发信息的另一线路卡。

7. 发明申请

US20090296579A1 EFFICIENT CONVERGENCE OF GROUPED VPN PREFIXES 有权
标题翻译：分组VPN前缀的有效收敛
公开(公告)号：US20090296579A1
公开(公告)日：2009-12-03
申请号：US12130345
申请日：2008-05-30
申请人： Pranav Dharwadkar , Yuri Tsier , Clarence Filsfils , John Bettink , Pradosh Mohapatra
发明人： Pranav Dharwadkar , Yuri Tsier , Clarence Filsfils , John Bettink , Pradosh Mohapatra
IPC分类号： H04L12/56
CPC分类号： H04L12/4641
摘要： In one embodiment, one or more virtual private network (VPN) prefixes may be grouped at a network node into sets having shared network border node next-hop options, where each border node has a defined index value associated therewith. Also, a list of VPN labels associated with each VPN prefix may be maintained by the network node, where each VPN label is associated with a border node of a particular set by a corresponding index value. Further, the network node may determine a particular border node for traffic to be forwarded, along with the defined index value. The network node may then apply the index value to select an associated VPN label, and may affix the selected VPN label to the traffic for forwarding.
摘要翻译：在一个实施例中，一个或多个虚拟专用网络（VPN）前缀可以在网络节点处被分组成具有共享网络边界节点下一跳选项的集合，其中每个边界节点具有与其相关联的定义的索引值。此外，与每个VPN前缀相关联的VPN标签的列表可以由网络节点维护，其中每个VPN标签通过相应的索引值与特定集合的边界节点相关联。此外，网络节点可以确定要转发的流量的特定边界节点以及所定义的索引值。然后，网络节点可以应用索引值来选择相关联的VPN标签，并且可以将所选择的VPN标签附加到流量进行转发。

8. 发明授权

US07024515B1 Methods and apparatus for performing continue actions using an associative memory which might be particularly useful for implementing access control list and quality of service features 有权
标题翻译：使用可能对于实现访问控制列表和服务质量特征特别有用的关联存储器来执行继续动作的方法和装置
公开(公告)号：US07024515B1
公开(公告)日：2006-04-04
申请号：US10295180
申请日：2002-11-15
申请人： Yixing Ruan , Chran Ham Chang , Pranav Dharwadkar , Hari Lalgudi
发明人： Yixing Ruan , Chran Ham Chang , Pranav Dharwadkar , Hari Lalgudi
IPC分类号： G06F12/00
CPC分类号： H04L63/101 , G06F21/6218 , G06F2221/2141
摘要： Methods and apparatus are disclosed for use with an associative memory, such as for, but not limited to implementing access control list and quality of service features in a communications or computing device. Multiple lists, such as access control lists, may be manipulated to typically produce a single list of entries with continuation indications, or the lists might be provided from another source. An associative memory is programmed with entries with each entry typically including a corresponding continuation level indication or flag. One or more lookup words are then generated and provided to the associative memory for a particular packet (or other entity) corresponding to the different continuation levels. In one implementation, a modified version of the Order Dependent Merge technique is used to generate the list of entries and to identify the corresponding continuation level or other continuation indication and the corresponding action to be performed for each entry.
摘要翻译：公开了与关联存储器一起使用的方法和装置，例如用于但不限于实现通信或计算设备中的访问控制列表和服务质量特征。可以操纵多个列表，例如访问控制列表，以通常产生具有连续指示的单个条目列表，或者可以从另一个源提供列表。相关存储器被编程为具有每个条目的条目，通常包括相应的继续级别指示或标志。然后生成一个或多个查找词，并将其提供给对应于不同继续级别的特定分组（或其他实体）的关联存储器。在一个实现中，使用订单相关合并技术的修改版本来生成条目列表并且识别相应的继续级别或其他连续指示以及要为每个条目执行的相应动作。

9. 发明授权

US08189585B2 Techniques for virtual private network fast convergence 有权
标题翻译：虚拟专网快速融合技术
公开(公告)号：US08189585B2
公开(公告)日：2012-05-29
申请号：US11546054
申请日：2006-10-10
申请人： Pranav Dharwadkar , Ramanan Subramanian
发明人： Pranav Dharwadkar , Ramanan Subramanian
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/00 , H04L12/4641 , H04L45/50 , H04L45/54 , H04L45/7453
摘要： An apparatus for VPN fast convergence in MPLS networks is disclosed. The apparatus comprises a first memory portion, a second memory portion, and a first logic for programming the memory portions. The first memory portion comprises a plurality of first data structures, where each of the plurality of first data structures includes an IGP label and an adjacency identifier that identifies one of a plurality of outgoing interfaces associated with the apparatus, where each IGP label indicates a Label Switched Path (LSP) through a network. The second memory portion comprises a plurality of second data structures, where each of the plurality of second data structures includes a network address identifier, a VPN label associated with the network address identifier, and a pointer that indicates one of the plurality of first data structures in the first memory portion, where each VPN label identifies a VPN that is reachable over the network.
摘要翻译：公开了一种用于MPLS网络中VPN快速收敛的设备。该装置包括第一存储器部分，第二存储器部分和用于对存储器部分进行编程的第一逻辑。第一存储器部分包括多个第一数据结构，其中多个第一数据结构中的每一个包括IGP标签和标识与该设备相关联的多个输出接口中的一个的相邻标识符，其中每个IGP标签指示标签交换路径（LSP）通过网络。第二存储器部分包括多个第二数据结构，其中多个第二数据结构中的每一个包括网络地址标识符，与网络地址标识符相关联的VPN标签，以及指示多个第一数据结构之一的指针在第一个存储器部分中，每个VPN标签标识通过网络可达的VPN。

10. 发明申请

US20120099420A1 EFFICIENT CONVERGENCE OF GROUPED VPN PREFIXES 有权
标题翻译：分组VPN前缀的有效收敛
公开(公告)号：US20120099420A1
公开(公告)日：2012-04-26
申请号：US13338980
申请日：2011-12-28
申请人： Pranav Dharwadkar , Yuri Tsier , Clarence Filsfils , John Bettink , Pradosh Mohapatra
发明人： Pranav Dharwadkar , Yuri Tsier , Clarence Filsfils , John Bettink , Pradosh Mohapatra
IPC分类号： H04L12/26
CPC分类号： H04L12/4641
摘要： In one embodiment, a list of border node next hop options is maintained in a memory. The list of border node next hop options includes one or more of border nodes that may be utilized to reach one or more prefixes. An index value is associated with each border node of the list of border node next hop options. A list of labels is also maintained in the memory. The index value of each border node is associated with a corresponding label for a path to reach that border node. When a change to the one or more border nodes is detected, the list of border node next hop options is updated to remove a border node. However, a label for the path to reach the border node is maintained in the list of labels for at least a period of time.
摘要翻译：在一个实施例中，边界节点下一跳选项的列表被保存在存储器中。边界节点下一跳选项的列表包括可用于达到一个或多个前缀的一个或多个边界节点。索引值与边界节点下一跳选项列表中的每个边界节点相关联。内存中也保留了标签列表。每个边界节点的索引值与到达该边界节点的路径的相应标签相关联。当检测到一个或多个边界节点的更改时，更新边界节点下一跳选项列表以删除边界节点。然而，到达边界节点的路径的标签在标签列表中保持至少一段时间。

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