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公开(公告)号：US20200153734A1
公开(公告)日：2020-05-14
申请号：US16231197
申请日：2018-12-21
Applicant: Cisco Technology, Inc.
IPC: H04L12/715 , H04L12/741 , H04L12/801 , H04L12/803 , H04L12/54 , H04L12/713
Abstract: In one embodiment, in-band operations data included in packets being processed is used to signal among entities of a virtualized packet processing apparatus. Using in-band operations data provides insight on actual entities used in processing of the packet within the virtualized packet processing apparatus. The operations data in the packet is modified to signal a detected overload condition of an entity that participates in communicating the packet within the virtualized packet processing apparatus and/or applying a network service to the packet. An In-Situ Operations, Administration, and Maintenance (IOAM) header is used in one embodiment, with the IOAM header typically including a new Overload Flag to signal the detection of the overload condition. In response to the signaled overload condition, a load balancer is adjusted such that future packets are not distributed to the virtualized entity associated with the detected overload condition.
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2.发明申请公开(公告)号：US20200145321A1
公开(公告)日：2020-05-07
申请号：US16230933
申请日：2018-12-21
Applicant: Cisco Technology, Inc.
IPC: H04L12/761 , H04L12/749 , H04L12/715 , H04L12/723
Abstract: In one embodiment, improved operations processing of multiple-protocol packets is performed by a node connected to a network. Received is a multiple-protocol (MP) packet that has multiple protocol headers, each having an operations data field. The operations data field of a first protocol header includes first protocol ordered operations data. Operations data is cohered from the operations data field of each of multiple protocol headers into the operations data field of a second protocol header resulting in the operations data field of the second protocol header including ordered MP operations data evidencing operations data of each of the multiple network nodes in a node traversal order taken by the MP packet among multiple network nodes. The ordered MP operations data includes said first protocol ordered operations data cohered from the operations data field of the first protocol header.
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3.发明申请公开(公告)号：US20200145255A1
公开(公告)日：2020-05-07
申请号：US16231247
申请日：2018-12-21
Applicant: Cisco Technology, Inc.
IPC: H04L12/46 , H04L12/749 , H04L12/54
Abstract: In one embodiment, a service function forwarder (SFF) analyzes pre-service state and post-service state of an original packet to determine whether to initiate and perform service offload or service bypass. A service function forwarder (SFF) receives a particular packet having a service function chain (SFC) encapsulation of the original packet, the SFC encapsulation identifying a particular service function path (SFP) designating a particular service function (SF). The SFF extracts pre-service state of the original packet, typically adding it to the particular packet in an In-Situ Operations, Administration, and Maintenance (IOAM) data field (or alternatively storing locally) before sending the particular packet to the particular SF. The SFF receives the particular packet after the SF applies the particular network service. In response to analyzing pre-service state and post-service state by the SFF, the SFF may perform service bypass or service offload for subsequently received packets identifying the same particular SFP.
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4.发明申请公开(公告)号：US20200344152A1
公开(公告)日：2020-10-29
申请号：US16392299
申请日：2019-04-23
Applicant: Cisco Technology, Inc.
Inventor： Carlos M. PIGNATARO , Nagendra Kumar NAINAR , Reshad RAHMAN , Frank BROCKNERS , Shwetha Subray BHANDARI
IPC: H04L12/707 , H04L12/703 , H04L12/24 , H04L29/06
Abstract: In one embodiment, in-band operations data (e.g., In-situ Operations, Administration, Maintenance and/or other operations data) is added to Seamless Bidirectional Forwarding (S-BFD) packets. In one embodiment, a S-BFD packet received by a node includes a BFD discriminator and operations data. Reactive processing is identified based on the BFD discriminator. The S-BFD packet and the operations data (e.g., in an operations data field in a header of the received S-BFD packet, in an IOAM Type-Length-Value (TLV), etc.) is processed according to the identified reactive function. Examples of these reactive actions include, but are not limited to, determining a result based on processing of said particular operations data by the local node or a remote analytics server, and sending a response packet including unprocessed and/or a result of the processed operations data (e.g., performance, loss, jitter, an indication of compliance with a service level agreement, and/or another data measurement or result).
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