公开(公告)号：US10044607B2

公开(公告)日：2018-08-07

申请号：US15096746

申请日：2016-04-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： John T. Chapman ,  Carlos M. Pignataro ,  Alon Bernstein ,  Stefano B. Previdi

IPC: H04L12/723 ,  H04L12/721 ,  H04L29/06

Abstract: A system and method for facilitating communication with segment routing in a cable modem network environment may be provided. A pseudowire (PW) control packet including segment routing information including a PW segment identifier (SID) for establishing a data session between the RPD and a network element over a packet switched network is received at a remote physical device (RPD). The PW SID may be indicative of a segment in the packet switched network to be used for communicating PW data packets of the data session. The PW control packet and the PW data packets being are emulations of a point-to-point connection between the RPD and the network element. A mapping between the PW SID and the data session is written into a segment table of the RPD.

公开(公告)号：US09992056B2

公开(公告)日：2018-06-05

申请号：US15148864

申请日：2016-05-06

Applicant: CISCO TECHNOLOGY, INC.

Inventor： David D. Ward ,  Carlos M. Pignataro ,  Frank Brockners ,  Shwetha Subray Bhandari

IPC: H04W4/00 ,  H04L12/24 ,  H04L12/54 ,  H04L29/06 ,  H04L12/26 ,  H04L12/46 ,  H04L12/723 ,  H04L12/70

CPC classification number: H04L41/0631 ,  H04L12/4633 ,  H04L12/4641 ,  H04L12/56 ,  H04L41/04 ,  H04L41/0677 ,  H04L41/0686 ,  H04L43/024 ,  H04L43/04 ,  H04L43/0811 ,  H04L43/0817 ,  H04L43/0829 ,  H04L43/0852 ,  H04L43/087 ,  H04L43/0876 ,  H04L43/10 ,  H04L45/50 ,  H04L69/22 ,  H04L2012/5625

Abstract: Embodiments of the disclosure pertain to activating in-band OAM based on a triggering event. Aspects of the embodiments are directed to receiving a first notification indicating a problem in a network; triggering a data-collection feature on one or more nodes in the network for subsequent packets that traverse the one or more nodes; evaluating a subsequent packet that includes data augmented by the data collection feature; and determining the problem in the network based on the data augmented to the subsequent packet.

公开(公告)号：US09954774B2

公开(公告)日：2018-04-24

申请号：US15066467

申请日：2016-03-10

Applicant: Cisco Technology, Inc.

Inventor： Prashanth Patil ,  K. Tirumaleswar Reddy ,  Gonzalo Salgueiro ,  James N. Guichard ,  Carlos M. Pignataro

IPC: H04L12/721

CPC classification number: H04L45/566 ,  H04L45/302

Abstract: In one embodiment, a service function classifier device determines a classification of a packet using one or more packet classification rules. The device selects a service function path based on the classification of the packet. The device determines one or more traffic flow characteristics based on the classification of the packet. The device generates a service function chaining (SFC) header that identifies the selected service function path and the determined one or more traffic flow characteristics. The SFC header is configured to cause a device along the service function path to forward the encapsulated packet based on the identified service function path and the determined one or more traffic flow characteristics. The device sends the packet along the selected service function path as an encapsulated packet that includes the generated SFC header.

公开(公告)号：US20180062984A1

公开(公告)日：2018-03-01

申请号：US15249260

申请日：2016-08-26

Applicant: Cisco Technology, Inc.

Inventor： Craig Thomas Hill ,  James Guichard ,  Darrin Joseph Miller ,  Carlos M. Pignataro

IPC: H04L12/723 ,  H04L12/911 ,  H04L29/08

CPC classification number: H04L45/50 ,  H04L45/306 ,  H04L45/34 ,  H04L45/38 ,  H04L45/566 ,  H04L45/64 ,  H04L47/825 ,  H04L67/327 ,  H04L69/22 ,  H04L69/321

Abstract: In a first enclave of a label switching network (LSN), a protocol data unit (PDU) of the LSN is formatted to include a network service field specifying a service to be applied to the PDU. The service field can be positioned between PDU data link layer and network layer fields. The PDU specifies PDU routing/forwarding information for a path in the LSN ending in an LSN second enclave, and routing/forwarding for a destination between path segments in a non-LSN. The PDU is communicated from the first enclave, via the non-LSN, to the second enclave in accordance with the routing/forwarding information for the destination between path segments in the non-LSN. In the second enclave, each network service specified for the PDU is determined and then applied to the PDU. The second enclave transmits the network serviced PDU from the second enclave in accordance with the routing/forwarding information of the PDU in the label switching network.

公开(公告)号：US20180034712A1

公开(公告)日：2018-02-01

申请号：US15219678

申请日：2016-07-26

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Joseph M. Clarke

IPC: H04L12/24 ,  H04L12/26

CPC classification number: H04L41/5019 ,  H04L41/5009 ,  H04L43/0829 ,  H04L43/087 ,  H04L43/106

Abstract: An ingress node inserts into a header of a packet service level agreement information and forwards the packet. At an egress node of the network, the packet is received and the service level agreement information is obtained from the header of the packet. The egress node verifies whether there is conformance to a service level agreement based on at least one parameter associated with reception of one or more packets at the egress node and the service level agreement information.

公开(公告)号：US20180026880A1

公开(公告)日：2018-01-25

申请号：US15253487

申请日：2016-08-31

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Faisal Iqbal

IPC: H04L12/723 ,  H04L12/733

CPC classification number: H04L45/50 ,  H04L45/20 ,  H04L45/26 ,  H04L47/825

Abstract: In one embodiment, a method includes generating a first trace request at an initiator node configured for segment routing, the first trace request comprising a query for FEC (Forwarding Equivalence Class) information, transmitting the first trace request on a path comprising at least one node wherein FEC details for the node are unknown by the initiator node, receiving a response to the first trace request comprising the FEC information, transmitting a second trace request with the FEC information, and receiving a response to the second trace request providing FEC validation. An apparatus is also disclosed herein.

公开(公告)号：US20180013674A1

公开(公告)日：2018-01-11

申请号：US15236447

申请日：2016-08-14

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Rajiv Asati ,  Carlos M. Pignataro

IPC: H04L12/741 ,  G06F9/455

CPC classification number: H04L29/12028 ,  G06F9/455 ,  G06F9/45504 ,  G06F2009/45583 ,  H04L45/32 ,  H04L45/586 ,  H04L45/66 ,  H04L45/745 ,  H04L49/70 ,  H04L61/103 ,  H04L61/1552 ,  H04L61/20 ,  H04L61/6022

Abstract: Aspects of the embodiments are directed to receiving an address resolution protocol (ARP) request message from a requesting virtual machine, the ARP request message comprising a request for a destination address for a destination virtual machine, wherein the destination address comprises one or both of a destination hardware address or a destination media access control address; augmenting the ARP request message with a network service header (NSH), the NSH identifying an ARP service function; and forwarding the augmented ARP request to the ARP service function.

公开(公告)号：US20170339072A1

公开(公告)日：2017-11-23

申请号：US15156689

申请日：2016-05-17

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Frank Brockners ,  David Delano Ward

IPC: H04L12/935 ,  H04L12/715 ,  H04L29/08 ,  H04L29/06

CPC classification number: H04L49/3009 ,  H04L45/566 ,  H04L45/586 ,  H04L45/64 ,  H04L67/32 ,  H04L69/22

Abstract: In one embodiment, a particular service chain data packet is received by a particular service node, with the service chain data packet including a header identifying service chain information. The particular service node applies a service to the particular service chain data packet. The particular service node adds service-layer operations data to the particular service chain data packet, with the service-layer operations data related to the current service function or the particular service node. Subsequently, the particular service node sends the particular service chain data packet with the service-layer operations data from the particular service node. In one embodiment, networking operations data is also added to the particular service chain data packet. In one embodiment, an egress service node removes the service-layer (and possibly networking) operations data and forwards to another system, possibly after processing this operations data.

公开(公告)号：US09825778B2

公开(公告)日：2017-11-21

申请号：US14870722

申请日：2015-09-30

Applicant: Cisco Technology, Inc.

Inventor： James N. Guichard ,  Paul Quinn ,  Javed Asghar ,  Reinaldo Penno ,  Yixing Ruan ,  Carlos M. Pignataro

IPC: G01R31/08 ,  H04L12/28 ,  H04J3/16 ,  H04L12/46 ,  H04L29/06

CPC classification number: H04L12/4633 ,  H04L63/0272

Abstract: A method for applying network services to data traffic forwarded between virtual private network (VPN) sites includes: receiving a data packet addressed to a target site associated with the VPN, determining services to be applied to the data packet according to a service chain, where the determining is a function of at least one of the VPN, the origin site or the target site, adding an indication of a VPN forwarding context onto the data packet, encapsulating the data packet with Network Service Header encapsulation, where a header for the encapsulated data packet indicates at least the service chain; forwarding the encapsulated data packet in accordance with the service chain, receiving the encapsulated data packet at the end of the service chain, terminating the service chain, removing the encapsulation, and forwarding the data packet to a target destination per the indication of a VPN forwarding context.

公开(公告)号：US20170302561A1

公开(公告)日：2017-10-19

申请号：US15639398

申请日：2017-06-30

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  David D. Ward ,  Stewart F. Bryant ,  Daniel C. Frost ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/723 ,  H04L12/741

CPC classification number: H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

Abstract: A method, network device, and computer readable medium are disclosed. In one embodiment of the method, a data packet is received at a node within a first segment routing enabled access network. The first access network is connected, via a first area edge node, to a first area of a subdivided segment routing enabled network, and a specified destination for the data packet is reachable via a second segment routing enabled access network connected to the subdivided network. The method embodiment further includes receiving from a centralized controller a remote segment identifier stack, where the remote segment identifier stack encodes a path extending from the first area edge node to the second access network. The embodiment of the method continues with encapsulating the data packet with a full segment identifier stack comprising the remote segment identifier stack, and forwarding the encapsulated data packet toward the first area edge node.