公开(公告)号：US20240356891A1

公开(公告)日：2024-10-24

申请号：US18759401

申请日：2024-06-28

Applicant: Cisco Technology, Inc.

Inventor： Jeffery Rodd Daviss

IPC: H04L61/4511 ,  H04L61/10 ,  H04L101/686

CPC classification number: H04L61/4511 ,  H04L61/10 ,  H04L2101/686

Abstract: This disclosure describes techniques for performing domain name system (DNS) support on public resolvers. For instance, an electronic device may send a query to a local DNS resolver. The electronic device may then receive an answer from the local DNS resolver that includes a pattern. Using the answer, the electronic device may generate a DNS packet that includes at least the answer and a query for a first Internet Protocol (IP) address associated with a first IP version, such as IPv6. The electronic device may then send the DNS packet to a public DNS resolver. Using the DNS packet, the public DNS resolver may generate a synthesized IP address associated with the first IP version. For example, the public DNS resolver may identify a second IP address associated with a second IP version, such as IPv4, and generate the synthesized IP address using the second IP address and the answer.

公开(公告)号：US12058097B2

公开(公告)日：2024-08-06

申请号：US17464966

申请日：2021-09-02

Applicant: Cisco Technology, Inc.

Inventor： Jeffery Rodd Daviss

IPC: H04L61/4511 ,  H04L61/10 ,  H04L101/686

CPC classification number: H04L61/4511 ,  H04L61/10 ,  H04L2101/686

Abstract: This disclosure describes techniques for performing domain name system (DNS) support on public resolvers. For instance, an electronic device may send a query to a local DNS resolver. The electronic device may then receive an answer from the local DNS resolver that includes a pattern. Using the answer, the electronic device may generate a DNS packet that includes at least the answer and a query for a first Internet Protocol (IP) address associated with a first IP version, such as IPv6. The electronic device may then send the DNS packet to a public DNS resolver. Using the DNS packet, the public DNS resolver may generate a synthesized IP address associated with the first IP version. For example, the public DNS resolver may identify a second IP address associated with a second IP version, such as IPv4, and generate the synthesized IP address using the second IP address and the answer.

公开(公告)号：US20240015091A1

公开(公告)日：2024-01-11

申请号：US17860957

申请日：2022-07-08

Applicant: Cisco Technology, Inc.

Inventor： Hari Shankar ,  Eui Sun Ahn ,  Jeffery Rodd Daviss ,  Rashmi Garg ,  Jon Langemak ,  William Mark Townsley

IPC: H04L45/12 ,  H04L45/02 ,  H04L9/40 ,  H04L12/46

CPC classification number: H04L45/123 ,  H04L45/02 ,  H04L63/0236 ,  H04L12/4633

Abstract: Techniques for a hub node to, provisioned in a network site of a hub and spoke overlay network, to receive a network advertisement from the spoke, decode network routing requirements from a border gateway protocol (BGP) large community associated with the network advertisement, and store the network routing requirements in association with a route associated with the spoke. The routing requirements may indicate one or more service(s) to be applied to the packet, a trust level associated with the spoke, and/or a trust zone associated with the spoke. The hub node may receive a packet from the spoke to be transmitted to destination spoke. The hub node may then route the packet to the destination spoke, drop the packet, or send the packet to a service node configured to apply the one or more services to the packet based on the routing requirements.

公开(公告)号：US12081430B2

公开(公告)日：2024-09-03

申请号：US17860957

申请日：2022-07-08

Applicant: Cisco Technology, Inc.

Inventor： Hari Shankar ,  Eui Sun Ahn ,  Jeffery Rodd Daviss ,  Rashmi Garg ,  Jon Langemak ,  William Mark Townsley

IPC: H04L45/12 ,  H04L9/40 ,  H04L12/46 ,  H04L45/02

CPC classification number: H04L45/123 ,  H04L12/4633 ,  H04L45/02 ,  H04L63/0236

Abstract: Techniques for a hub node to, provisioned in a network site of a hub and spoke overlay network, to receive a network advertisement from the spoke, decode network routing requirements from a border gateway protocol (BGP) large community associated with the network advertisement, and store the network routing requirements in association with a route associated with the spoke. The routing requirements may indicate one or more service(s) to be applied to the packet, a trust level associated with the spoke, and/or a trust zone associated with the spoke. The hub node may receive a packet from the spoke to be transmitted to destination spoke. The hub node may then route the packet to the destination spoke, drop the packet, or send the packet to a service node configured to apply the one or more services to the packet based on the routing requirements.

公开(公告)号：US20230062068A1

公开(公告)日：2023-03-02

申请号：US17464966

申请日：2021-09-02

Applicant: Cisco Technology, Inc.

Inventor： Jeffery Rodd Daviss

IPC: H04L29/12

Abstract: This disclosure describes techniques for performing domain name system (DNS) support on public resolvers. For instance, an electronic device may send a query to a local DNS resolver. The electronic device may then receive an answer from the local DNS resolver that includes a pattern. Using the answer, the electronic device may generate a DNS packet that includes at least the answer and a query for a first Internet Protocol (IP) address associated with a first IP version, such as IPv6. The electronic device may then send the DNS packet to a public DNS resolver. Using the DNS packet, the public DNS resolver may generate a synthesized IP address associated with the first IP version. For example, the public DNS resolver may identify a second IP address associated with a second IP version, such as IPv4, and generate the synthesized IP address using the second IP address and the answer.