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公开(公告)号：US20240430227A1
公开(公告)日：2024-12-26
申请号：US18826319
申请日：2024-09-06
Applicant: Cisco Technology, Inc.
Inventor： Ali Sajassi , Samir Thoria , Lukas Krattiger , Manoj Kumar Pandey
IPC: H04L61/5053 , H04L9/40 , H04L61/5014 , H04L101/622
Abstract: Systems and techniques are provided for synchronizing DHCP snoop information. In some examples, a method can include, performing, by a first PE device from a plurality of PE devices, DHCP snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the plurality of PE devices is part of an ethernet segment for multihoming the DHCP client. In some aspects, the method includes determining, based on snooping the first plurality of DHCP messages, an association between an IP address corresponding to the DHCP client and a MAC address corresponding to the DHCP client. In some examples, the method includes sending, by the first PE device to at least one other PE device from the plurality of PE devices, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client.
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公开(公告)号：US12040944B2
公开(公告)日：2024-07-16
申请号：US18447158
申请日：2023-08-09
Applicant: Cisco Technology, Inc.
Inventor： Uffaz Nathaniel , Aakruthi Ramkumar Gopisetty , Jason David Notari , Shyam Kapadia , Lukas Krattiger
IPC: H04L41/08 , H04L12/46 , H04L41/0806 , H04L41/0893 , H04L41/12 , H04L45/74
CPC classification number: H04L41/0883 , H04L12/4641 , H04L41/0806 , H04L41/0893 , H04L41/12 , H04L45/74
Abstract: The present technology provides a framework for user-guided end-to-end automation of network deployment and management, that enables a user to guide the automation process for any kind of network deployment from the ground up, as well as offering network management, visibility, and compliance verification. The disclosed technology accomplishes this by creating a stateful and interactive virtual representation of a fabric using a customizable underlay fabric template instantiated with user-provided parameter values and network topology data computed from one or more connected network devices. A set of expected configurations corresponding to the user-specified underlay and overly fabric policies is then generated for deployment onto the connected network devices. Network deviations from the intended fabric policies are addressed by the provision of one or more configuration lines to be deployed onto or removed from the connected network devices to bring the network state in agreement with the set of expected configuration.
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公开(公告)号：US20240137305A1
公开(公告)日：2024-04-25
申请号：US18401208
申请日：2023-12-29
Applicant: Cisco Technology, Inc.
Inventor： Samir D Thoria , Ali Sajassi , Rajesh Sharma , Kesavan Thiruvenkatasamy , Aparna Pattekar , Lukas Krattiger , Neeraj Malhotra
Abstract: This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.
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公开(公告)号：US20230388185A1
公开(公告)日：2023-11-30
申请号：US18447158
申请日：2023-08-09
Applicant: Cisco Technology, Inc.
Inventor： Uffaz Nathaniel , Aakruthi Ramkumar Gopisetty , Jason David Notari , Shyam Kapadia , Lukas Krattiger
IPC: H04L41/08 , H04L12/46 , H04L41/0806 , H04L41/0893 , H04L41/12 , H04L45/74
CPC classification number: H04L41/0883 , H04L12/4641 , H04L41/0806 , H04L41/0893 , H04L41/12 , H04L45/74
Abstract: The present technology provides a framework for user-guided end-to-end automation of network deployment and management, that enables a user to guide the automation process for any kind of network deployment from the ground up, as well as offering network management, visibility, and compliance verification. The disclosed technology accomplishes this by creating a stateful and interactive virtual representation of a fabric using a customizable underlay fabric template instantiated with user-provided parameter values and network topology data computed from one or more connected network devices. A set of expected configurations corresponding to the user-specified underlay and overly fabric policies is then generated for deployment onto the connected network devices. Network deviations from the intended fabric policies are addressed by the provision of one or more configuration lines to be deployed onto or removed from the connected network devices to bring the network state in agreement with the set of expected configuration.
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公开(公告)号：US20230130631A1
公开(公告)日：2023-04-27
申请号：US17858215
申请日：2022-07-06
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Lukas Krattiger , Shyam Nayan Kapadia , Nitin Kumar
Abstract: In an example method, a head node connected to a source device transmits a multicast data flow from the source device to receiving devices connected to tail nodes using Default MDT. The example method further includes determining that requirements have been met to begin transmitting the multicast data flow using Data MDT. The method may further include determining whether the tail nodes are able to receive the multicast data flow using Data MDT. In response to determining that all the tail nodes are able to receive the multicast data flow using Data MDT, switch to transmitting the multicast data flow to the tail nodes using Data MDT. In response to determining that at least one of the tail nodes is unable to receive the multicast data flow using the Data MDT, continue transmitting the multicast data flow using Data MDT
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Patent Agency Ranking
公开(公告)号：US11606333B1
公开(公告)日：2023-03-14
申请号：US17686797
申请日：2022-03-04
Applicant: Cisco Technology, Inc.
Inventor： Ali Sajassi , Samir Thoria , Lukas Krattiger , Manoj Kumar Pandey
IPC: H04L61/5053 , H04L9/40 , H04L61/5014 , H04L101/622
Abstract: Systems and techniques are provided for synchronizing DHCP snoop information. In some examples, a method can include, performing, by a first PE device from a plurality of PE devices, DHCP snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the plurality of PE devices is part of an ethernet segment for multihoming the DHCP client. In some aspects, the method includes determining, based on snooping the first plurality of DHCP messages, an association between an IP address corresponding to the DHCP client and a MAC address corresponding to the DHCP client. In some examples, the method includes sending, by the first PE device to at least one other PE device from the plurality of PE devices, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client.
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公开(公告)号：US20220255835A1
公开(公告)日：2022-08-11
申请号：US17173387
申请日：2021-02-11
Applicant: Cisco Technology, Inc.
Inventor： Satya Ranjan Mohanty , Lukas Krattiger , Mankamana Prasad Mishra
IPC: H04L12/751 , H04L12/46
Abstract: A method is performed at a provider edge node configured to communicate with remote provider edge nodes over an Ethernet virtual private network. The method includes receiving, from the remote provider edge nodes, route advertisements for a common subnet hosted on the remote provider edge nodes. The route advertisements include distinct remote route distinguishers, a common IP prefix for the common subnet, and remote paths for the common subnet. The method further includes determining whether there are at least a predetermined number of the remote paths preferred over a local path for the common subnet hosted on the provider edge node based on the remote route distinguishers and a local route distinguisher for the local path. The method includes, when there are at least the predetermined number of the remote paths preferred over the local path, suppressing sending of a route advertisement for the local path for the common subnet.
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公开(公告)号：US11336518B2
公开(公告)日：2022-05-17
申请号：US17355651
申请日：2021-06-23
Applicant: Cisco Technology, Inc.
Inventor： Shyam Kapadia , Lukas Krattiger , Jason David Notari
IPC: G06F15/173 , H04L41/0813 , H04L29/06
Abstract: Techniques for a configuration change service to transition a network controller into a frozen state, causing network users submitting configuration changes associated with the network to refrain from deploying the configuration changes for a period of time are disclosed. A first user configured as a stager role may submit data representing a proposed change to the configuration change service, where the proposed change may be stored in association with a list of proposed changes. A second user configured as an approver role may submit data representing an approval or disapproval of the proposed changes to the configuration change service, where a modified list of proposed changes may be generated. A third user configured as an administrator role may submit data configured to transition the controller to an unfrozen state and/or deploy the changes included in the list of proposed changes to the network controller, subsequent to the period of time.
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公开(公告)号：US20210385133A1
公开(公告)日：2021-12-09
申请号：US17407006
申请日：2021-08-19
Applicant: Cisco Technology, Inc.
Inventor： Jason David Notari , Manish Chandra Agrawal , Liqin Dong , Lukas Krattiger , Patnala Debashis Rao
IPC: H04L12/24
Abstract: The present technology provides a system, method and computer-readable medium for configuration pattern recognition and inference, directed to a device with an existing configuration, through an extensible policy framework. The policy framework uses a mixture of python template logic and CLI micro-templates as a mask to infer the intent behind an existing device configuration in a bottom-up learning inference process. Unique values for device/network identifiers and addresses as well as other resources are extracted and accounted for. The consistency of devices within the fabric is checked based on the specific policies built into the extensible framework definition. Any inconsistencies found are flagged for user correction or automatically remedied by a network controller. This dynamic configuration pattern recognition ability allows a fabric to grow without being destroyed and re-created, thus new devices with existing configurations may be added and automatically configured to grow a Brownfield fabric.
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公开(公告)号：US09838315B2
公开(公告)日：2017-12-05
申请号：US14811861
申请日：2015-07-29
Applicant: Cisco Technology, Inc.
Inventor： Shyam Kapadia , Lukas Krattiger , Vrishab Sikand
IPC: H04L12/741 , H04L12/721 , H04L12/715 , H04L12/931 , H04L12/66
Abstract: In one embodiment, a method for improving routing for a stretched subnet includes receiving a first communication on a border leaf of the stretched subnet, where the border leaf is a top of rack (ToR) switch configured to facilitate connectivity between an internal data center fabric and at least one external site associated with the stretched subnet, based on routing information received with the received communication, identifying a source address for the received communication as either from within the internal data center fabric or from the at least one external site, and if the source address is from the external site, storing an abbreviated route based on the source address in at least one hardware table, where the abbreviated route is a route to the at least one external site, and upon subsequent receipt of a second communication to be forwarded to the source address, forwarding the second communication in accordance with the abbreviated route.
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