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公开(公告)号：US20250062984A1
公开(公告)日：2025-02-20
申请号：US18934224
申请日：2024-10-31
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Ahmed Mohamed Ahmed Abdelsalam , Rakesh Gandhi , Jisu Bhattacharya , Pablo Camarillo Garvia
Abstract: This disclosure describes techniques for detecting and monitoring paths in a network. The techniques include causing a source node to generate probe packets to traverse a multi-protocol label switching (MPLS) network, for instance. In some examples, the probe packets include entropy values that correspond to individual equal-cost multi-path (ECMP) paths of the network. The probe packets may be received at an SDN controller from a sink node after traversing the network. Analysis of the probe packets allow path discovery and mapping of the entropy values to ECMP paths. The mapping of discovered paths may be used for optimization of network monitoring activities, including second subsequent probe packets over particular ECMP paths based on the mapped entropy values.
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公开(公告)号：US12206573B2
公开(公告)日：2025-01-21
申请号：US17691016
申请日：2022-03-09
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Ahmed Mohamed Ahmed Abdelsalam , Rakesh Gandhi , Jisu Bhattacharya , Pablo Camarillo Garvia
Abstract: This disclosure describes techniques for detecting and monitoring paths in a network. The techniques include causing a source node to generate probe packets to traverse a multi-protocol label switching (MPLS) network, for instance. In some examples, the probe packets include entropy values that correspond to individual equal-cost multi-path (ECMP) paths of the network. The probe packets may be received at an SDN controller from a sink node after traversing the network. Analysis of the probe packets allow path discovery and mapping of the entropy values to ECMP paths. The mapping of discovered paths may be used for optimization of network monitoring activities, including second subsequent probe packets over particular ECMP paths based on the mapped entropy values.
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公开(公告)号：US11627016B2
公开(公告)日：2023-04-11
申请号：US16821965
申请日：2020-03-17
Applicant: Cisco Technology, Inc.
Inventor： Pablo Camarillo Garvia , Hendrikus G. P. Bosch , Clarence Filsfils
Abstract: In one embodiment, a segment routing and tunnel exchange provides packet forwarding efficiencies in a network, including providing an exchange between a segment routing domain and a packet tunnel domain. One application includes the segment routing and tunnel exchange interfacing segment routing packet forwarding (e.g., in a Evolved Packet Core (EPC) and/or 5-G user plane) and packet tunnel forwarding in access networks (e.g., replacing a portion of a tunnel between an access node and a user plane function for accessing a corresponding data network). In one embodiment, a network provides mobility services using a segment routing data plane that spans segment routing and tunnel exchange(s) and segment routing-enabled user plane functions. One embodiment uses the segment routing data plane without any modification to a (radio) access network (R)AN (e.g., Evolved NodeB, Next Generation NodeB) nor to user equipment (e.g., any end user device).
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公开(公告)号：US20230026874A1
公开(公告)日：2023-01-26
申请号：US17937961
申请日：2022-10-04
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Pablo Camarillo Garvia , Hendrikus G.P. Bosch , Clarence Filsfils
Abstract: In one embodiment, a segment routing and tunnel exchange provides packet forwarding efficiencies in a network, including providing an exchange between a segment routing domain and a packet tunnel domain. One application includes the segment routing and tunnel exchange interfacing segment routing packet forwarding (e.g., in a Evolved Packet Core (EPC) and/or 5-G user plane) and packet tunnel forwarding in access networks (e.g., replacing a portion of a tunnel between an access node and a user plane function for accessing a corresponding data network). In one embodiment, a network provides mobility services using a segment routing data plane that spans segment routing and tunnel exchange(s) and segment routing-enabled user plane functions. One embodiment uses the segment routing data plane without any modification to a (radio) access network (R)AN (e.g., Evolved NodeB, Next Generation NodeB) nor to user equipment (e.g., any end user device).
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公开(公告)号：US20220394109A1
公开(公告)日：2022-12-08
申请号：US17820000
申请日：2022-08-16
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Francois Clad , Pablo Camarillo Garvia , Siva Sivabalan , Syed Kamran Raza
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US11463561B2
公开(公告)日：2022-10-04
申请号：US16948369
申请日：2020-09-15
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Francois Clad , Pablo Camarillo Garvia , David Delano Ward
IPC: H04L12/741 , H04L12/46 , H04L69/22 , H04L69/324 , H04L45/00 , H04L67/10 , H04L45/02 , H04L45/50 , H04L61/5007 , H04L67/63 , H04L45/74 , H04L49/35 , H04L45/741 , H04L61/2503 , H04L101/659 , H04L43/028 , H04L9/40 , H04L45/745
Abstract: In one embodiment, new Segment Routing capabilities are used in the steering of packets through Segment Routing nodes in a network. A Segment List includes a set of one or more Segment List (SL) Groups, each of which identifies one or more Segments contiguously or non-contiguously stored in the Segment List (or stored across multiple Segment Lists) of a Segment Routing packet. Each SL Group typically includes one Segment that is encoded as a Segment Identifier, and may include Segments that are Extended Values. The steering order of SL Groups is not required to be the same order as they are listed in the Segment List, as the value of Segments Left may be increased, remain the same, or decreased (possibly to skip a next SL Group) and possibly based on the result of an evaluation of a conditional expression.
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公开(公告)号：US20210320884A1
公开(公告)日：2021-10-14
申请号：US16847173
申请日：2020-04-13
Applicant: Cisco Technology Inc.
Inventor： Clarence Filsfils , Pablo Camarillo Garvia , Syed Kamran Raza , Francois Clad
IPC: H04L12/935 , H04L12/721 , H04L29/06
Abstract: The present disclosure relates to methods and systems for inserting micro segments into a data packet. The methods may include the steps of receiving a packet with a destination address corresponding to a Micro Segment Identifier (uSID) carrier having one or more existing micro segments followed by one or more empty micro segment positions, receiving information relating to one or more new micro segments to be inserted into the uSID carrier, the one or more new micro segments associated with a new bit length, calculating a remaining bit length of the uSID carrier, the remaining bit length associated with the one or more empty micro segment positions in the uSID carrier, wherein, if the remaining bit length is greater than or equal to the new bit length, updating the uSID carrier by inserting the new micro segments, and forwarding the packet to destinations associated with the updated uSID carrier.
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公开(公告)号：US11134002B2
公开(公告)日：2021-09-28
申请号：US16659484
申请日：2019-10-21
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Swadesh Agrawal , Zafar Ali , Pablo Camarillo Garvia , Francois Clad
IPC: H04L12/715 , H04L12/749
Abstract: In one embodiment, a network comprises a first forwarding domain using a first data plane forwarding protocol and a second forwarding domain using a second data plane forwarding protocol different than the first data forwarding plane forwarding protocol. The first forwarding domain includes a first path node and a particular border node. The second forwarding domain includes a second path node and the particular border node. The particular border node performs Segment Routing or other protocol interworking between the different data plane forwarding domains, such as for transporting packets through a different forwarding domain or translating a packet to use a different data forwarding protocol. These forwarding domains typically include Segment Routing (SR) and SR-Multiprotocol Label Switching (SR-MPLS). Paths through the network are determined by a Path Computation Engine and/or based on route advertisements such associated with Binding Segment Identifiers (BSIDs) (e.g., labels, Internet Protocol version 6 addresses).
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公开(公告)号：US11012350B2
公开(公告)日：2021-05-18
申请号：US16513379
申请日：2019-07-16
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Pablo Camarillo Garvia , Francois Clad , Swadesh Agrawal , Zafar Ali
IPC: H04L12/723 , H04L12/715 , H04L12/46 , H04L12/749 , H04L12/721
Abstract: Network interworking with no cross-domain state may be provided. First, an edge node may receive a packet from an intermediate node in a first domain. The edge node may be between the first domain and a second domain. Next, the edge node may pop, in response to a first Service Identifier (SID) in the packet, headers corresponding to the first domain from the packet. The edge node may then push, in response to the first SID, a label stack corresponding to the second domain onto the packet. The first SID may include data corresponding to the label stack. Then the edge node may route the packet to the second domain destine to an end node in the second domain.
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公开(公告)号：US20210021513A1
公开(公告)日：2021-01-21
申请号：US16513379
申请日：2019-07-16
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Pablo Camarillo Garvia , Francois Clad , Swadesh Agrawal , Zafar Ali
IPC: H04L12/723 , H04L12/715 , H04L12/46 , H04L12/749
Abstract: Network interworking with no cross-domain state may be provided. First, an edge node may receive a packet from an intermediate node in a first domain. The edge node may be between the first domain and a second domain. Next, the edge node may pop, in response to a first Service Identifier (SID) in the packet, headers corresponding to the first domain from the packet. The edge node may then push, in response to the first SID, a label stack corresponding to the second domain onto the packet. The first SID may include data corresponding to the label stack. Then the edge node may route the packet to the second domain destine to an end node in the second domain.
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