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1. 发明授权

US11388088B2 Segment routing network signaling and packet processing 有权
公开(公告)号：US11388088B2
公开(公告)日：2022-07-12
申请号：US16675083
申请日：2019-11-05
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Zafar Ali , Syed Kamran Raza , Ahmed Refaat Bashandy , Nagendra Kumar Nainar , Carlos M. Pignataro , Jaganbabu Rajamanickam , Rakesh Gandhi , Bhupendra Yadav , Faisal Iqbal
IPC分类号： H04L45/00 , H04L43/106 , H04L45/02 , H04L41/0246 , H04L101/659 , H04L45/302 , H04L45/741
摘要： In one embodiment, segment routing (SR) network processing of packets is performed which includes operations signaling and processing of packets in manners providing processing and/or memory efficiencies. One embodiment includes acquiring a segment routing particular packet by a particular router in a network. Responsive to the particular router data plane ascertained during fast path processing by a fast path processing unit that the segment routing particular packet is to be Operations, Administration, and Maintenance (OAM) processed by a different processing unit in the particular router, communicating a time stamp of a current time and the segment routing particular packet including a segment routing header that includes OAM signaling from said fast path processing to the different processing unit, with fast path processing being hardware-based packet processing by the fast path processing unit. The segment routing particular packet is OAM processing by the different processing unit.

2. 发明申请

US20190215267A1 Segment Routing Network Processing of Packets including Packets having a Segment Identifier Structure Providing Processing and/or Memory Efficiencies 审中-公开
公开(公告)号：US20190215267A1
公开(公告)日：2019-07-11
申请号：US15866176
申请日：2018-01-09
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Ahmed Refaat Bashandy , Syed Kamran Raza , Darren Dukes , Patrice Brissette , Jisu Bhattacharya
IPC分类号： H04L12/721 , H04L12/755 , H04L12/741
CPC分类号： H04L45/566 , H04L45/021 , H04L45/34 , H04L45/741 , H04L45/745
摘要： In one embodiment, segment routing (SR) network processing of packets is performed on packets having a segment identifier structure providing processing and/or memory efficiencies. Responsive to an identified particular segment routing policy, the particular router retrieves from memory a dynamic segment routing identifier portion of the particular SR policy that includes a SR node value and a SR function value. The SR function value identifies segment routing processing to be performed by a router in the network identified based on the SR node value. A segment routing discriminator is independently identified, possibly being a fixed value for all segment identifiers in the network. Before sending into the network, a complete segment identifier is added to the particular packet by combining the segment routing discriminator with the dynamic segment routing identifier portion. The particular packet including the complete segment identifier is sent into the network.

3. 发明授权

US09531627B1 Selecting a remote path using forwarding path preferences 有权
标题翻译：使用转发路径首选项选择远程路径
公开(公告)号：US09531627B1
公开(公告)日：2016-12-27
申请号：US14155769
申请日：2014-01-15
申请人： Cisco Technology, Inc.
发明人： Santiago Alvarez , Sami Boutros , Syed Kamran Raza
IPC分类号： H04L12/723
CPC分类号： H04L45/507
摘要： Selecting remote path using forwarding path preferences is disclosed. In an embodiment, a message of a first network node identifying one or more forwarding path preferences in association with one or more destination addresses is received at a packet router. A particular path corresponding to a particular forwarding path preference from among the one or more forwarding path preferences received in the message is determined and in response a particular label is determined. A forwarding entry associating the particular label with the particular forwarding path preference and the particular path is stored. The particular label is forwarded to a second network node. A packet including the particular label is received at the packet router and the particular path associated with the particular label included with the packet is selected based on the forwarding entry associated with the label. The packet is forwarded to a network node via the selected path.
摘要翻译：公开了使用转发路径首选项选择远程路径。在一个实施例中，在分组路由器处接收到与一个或多个目的地地址相关联地标识一个或多个转发路径偏好的第一网络节点的消息。确定与在消息中接收到的一个或多个转发路径偏好中的特定转发路径偏好相对应的特定路径，并且响应于确定特定标签。存储将特定标签与特定转发路径偏好和特定路径相关联的转发条目。特定的标签被转发到第二个网络节点。在分组路由器处接收到包含特定标签的分组，并且基于与标签相关联的转发条目来选择与分组所包含的特定标签相关联的特定路径。分组通过所选路径转发到网络节点。

4. 发明授权

US11563683B2 SRv6 with micro segment identifiers 有权
公开(公告)号：US11563683B2
公开(公告)日：2023-01-24
申请号：US17493334
申请日：2021-10-04
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Jisu Bhattacharya , Zafar Ali , Syed Kamran Raza
IPC分类号： H04L12/749 , H04L45/741 , H04L45/02 , H04L45/745 , H04L61/2557
摘要： In one embodiment, a method includes receiving a packet comprising a destination address in a destination address field of the packet, where the destination address including at least a first global identifier and a second global identifier, determining that the first global identifier corresponds to the first network apparatus, determining that a local identifier in the destination address is associated with the first global identifier, identifying one or more instructions associated with the local identifier, performing one or more functions instructed by the one or more instructions, updating the destination address in the destination field of the packet to an updated destination address, determining a forwarding rule associated with the packet, and forwarding the packet with the updated destination address based on the forwarding rule.

5. 发明授权

US11558295B2 Forwarding table validation 有权
公开(公告)号：US11558295B2
公开(公告)日：2023-01-17
申请号：US17115451
申请日：2020-12-08
申请人： Cisco Technology, Inc.
发明人： Nagendra Kumar Nainar , Carlos M. Pignataro , Zafar Ali , Syed Kamran Raza
IPC分类号： H04L45/74 , H04L45/745 , H04L43/12
摘要： The present disclosure includes methods, systems, and non-transitory computer-readable media for validating data in a data structure used for forwarding packets by a network device comprising sending a data packet probe identifying a destination and including a segment ID, wherein the segment ID maps to a first interpretation by a receiving router to perform an action on the data packet probe to rewrite a portion of a destination address in a header of the data packet probe, and to redirect the data packet probe to the network device that initiated the data packet probe.

6. 发明申请

US20220417137A1 Segment Routing Network Signaling and Packet Processing 有权
公开(公告)号：US20220417137A1
公开(公告)日：2022-12-29
申请号：US17811570
申请日：2022-07-08
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Zafar Ali , Syed Kamran Raza , Ahmed Refaat Bashandy , Nagendra Kumar Nainar , Carlos M. Pignataro , Jaganbabu Rajamanickam , Rakesh Gandhi , Bhupendra Yadav , Faisal Iqbal
IPC分类号： H04L45/00 , H04L43/106 , H04L45/02 , H04L41/0246
摘要： In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

7. 发明授权

US11445048B2 Systems and methods for compressing a SID list 有权
公开(公告)号：US11445048B2
公开(公告)日：2022-09-13
申请号：US16990030
申请日：2020-08-11
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Francois Clad , Pablo Camarillo Garvia , Siva Sivabalan , Syed Kamran Raza
IPC分类号： H04L69/04 , H04L45/74
摘要： In one embodiment, a method includes identifying, by a network component, a first segment identifier (SID) within a SID list. The first SID includes a first SID block and a first micro SID (uSID). The method also includes initializing, by the network component, a packing list of a uSID carrier with the first uSID of the first SID and initializing, by the network component, a packing block of the uSID carrier with the first SID block of the first SID. The method further includes initializing, by the network component, a remaining packing capacity of the packing list with a carrier capacity of the first SID and initializing, by the network component, an empty compressed SID list.

8. 发明授权

US11438445B2 Providing efficiencies in processing and communicating internet protocol packets in a network using segment routing 有权
公开(公告)号：US11438445B2
公开(公告)日：2022-09-06
申请号：US15929610
申请日：2020-05-12
申请人： Cisco Technology, Inc.
发明人： Ahmed Refaat Bashandy , Syed Kamran Raza , Jisu Bhattacharya , Clarence Filsfils
IPC分类号： H04L29/06 , H04L69/22 , H04L69/324 , H04L45/00 , H04L67/10 , H04L45/02 , H04L45/50 , H04L12/46 , H04L45/74 , H04L61/5007 , H04L49/35 , H04L67/63 , H04L45/741 , H04L101/659 , H04L61/2503 , H04L43/028 , H04L9/40 , H04L45/745
摘要： In one embodiment, a Segment Routing network node provides efficiencies in processing and communicating Internet Protocol packets in a network. This Segment Routing node typically advertises (e.g., using Border Gateway Protocol) its Segment Routing processing capabilities, such as Penultimate Segment Pop (PSP) and/or Ultimate Segment Pop (USP) of a Segment Routing Header (including in the context of a packet that has multiple Segment Routing Headers). Subsequently, an Internet Protocol Segment Routing packet having multiple Segment Routing Headers is received. The packet is processed according to a Segment Routing function, with is processing including removing a first one of the Segment Routing Headers and forwarding the resultant Segment Routing packet. The value of the Segments Left field in the first Segment Routing Header identifies to perform PSP when the value is one, to perform USP when the value is zero, or to perform other processing.

9. 发明授权

US11362946B2 SRv6 with micro segment identifiers 有权
公开(公告)号：US11362946B2
公开(公告)日：2022-06-14
申请号：US17066140
申请日：2020-10-08
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Jisu Bhattacharya , Zafar Ali , Syed Kamran Raza
IPC分类号： H04L12/749 , H04L45/741 , H04L45/02 , H04L45/745 , H04L61/2557
摘要： In one embodiment, a method includes receiving a packet comprising a destination address in a destination address field of the packet, where the destination address including at least a first global identifier and a second global identifier, determining that the first global identifier corresponds to the first network apparatus, determining that a local identifier in the destination address is associated with the first global identifier, identifying one or more instructions associated with the local identifier, performing one or more functions instructed by the one or more instructions, updating the destination address in the destination field of the packet to an updated destination address, determining a forwarding rule associated with the packet, and forwarding the packet with the updated destination address based on the forwarding rule.

10. 发明申请

US20220029918A1 SRv6 with Micro Segment Identifiers 有权
公开(公告)号：US20220029918A1
公开(公告)日：2022-01-27
申请号：US17493334
申请日：2021-10-04
申请人： Cisco Technology, Inc.
发明人： Clarence Filsfils , Jisu Bhattacharya , Zafar Ali , Syed Kamran Raza
IPC分类号： H04L12/749 , H04L12/751 , H04L12/741
摘要： In one embodiment, a method includes receiving a packet comprising a destination address in a destination address field of the packet, where the destination address including at least a first global identifier and a second global identifier, determining that the first global identifier corresponds to the first network apparatus, determining that a local identifier in the destination address is associated with the first global identifier, identifying one or more instructions associated with the local identifier, performing one or more functions instructed by the one or more instructions, updating the destination address in the destination field of the packet to an updated destination address, determining a forwarding rule associated with the packet, and forwarding the packet with the updated destination address based on the forwarding rule.

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