公开(公告)号：US09871717B2

公开(公告)日：2018-01-16

申请号：US14262639

申请日：2014-04-25

Applicant: Metaswitch Networks Ltd

Inventor： Casey Davenport ,  Simon Wingrove ,  Alex Pollitt ,  Michael Curtis ,  Shaun Crampton ,  Steve Balls ,  Fiona Corden

IPC: H04L12/751 ,  H04L12/721 ,  H04L12/715

CPC classification number: H04L45/02 ,  H04L45/26 ,  H04L45/64

Abstract: Measures for processing data in a packet-switched network. At a first device in the network, an echo request packet is transmitted into the network. The echo request packet comprises a predetermined identifier. An echo response packet is received from a second device in the network. In response to the received echo response packet comprising the predetermined identifier, the received echo response packet is identified as a packet generated on the basis of an echo request packet originated from the first device, and an Internet Protocol (IP) address comprised in the received echo response packet is determined to be an IP address of the second device.

公开(公告)号：US09923799B2

公开(公告)日：2018-03-20

申请号：US14262631

申请日：2014-04-25

Applicant: Metaswitch Networks Ltd

Inventor： Casey Davenport ,  Simon Wingrove ,  Alex Pollitt ,  Michael Curtis ,  Shaun Crampton ,  Steve Balls ,  Fiona Corden

IPC: H04L12/751 ,  H04L12/717 ,  H04L12/741

CPC classification number: H04L45/02 ,  H04L45/42 ,  H04L45/74

Abstract: Measures for processing data in a packet-switched network. At a first device in the network, a packet transmitted from a second device in the network is received. The received packet comprising an Internet Protocol (IP) address for a third device in the network. On the basis of the IP address for the third device comprised in the received data packet, lookup in an IP routing table of the second device is initiated to obtain a next-hop address for the received packet. The obtained next-hop IP address is determined to be an IP address of a device connected to the first device.

公开(公告)号：US10165090B2

公开(公告)日：2018-12-25

申请号：US14473680

申请日：2014-08-29

Applicant: Metaswitch Networks Ltd

Inventor： Fiona Corden ,  Steve Balls ,  Alex Pollitt ,  Shaun Crampton ,  Jonathan Harrison ,  Jeff Rollins

IPC: H04L29/06 ,  H04L12/715 ,  H04L12/713 ,  H04L29/08

Abstract: Measures for transferring routing protocol information between a software defined network and one or more external networks are provided. A control node in a software defined network (SDN) is configured to maintain a protocol information database comprising routing protocol information for one or more switching nodes in the SDN. In response to detecting occurrence of a predetermined trigger event, the control node modifies the routing protocol information in the protocol information database, and determines whether the one or more switching nodes include an edge switching node. In response to the determination, a routing protocol message is transmitted from the control node to the edge switching node for forwarding via an external network interface. The routing protocol message includes data generated on the basis of the modified routing protocol information.

公开(公告)号：US10063456B2

公开(公告)日：2018-08-28

申请号：US14262609

申请日：2014-04-25

Applicant: Metaswitch Networks Ltd

Inventor： Casey Davenport ,  Simon Wingrove ,  Alex Pollitt ,  Michael Curtis ,  Shaun Crampton ,  Steve Balls ,  Fiona Corden

IPC: H04L12/751 ,  H04L12/715

CPC classification number: H04L45/02 ,  H04L45/64

Abstract: Measures for processing data in a packet-switched network. A first device is configured to snoop control packets of a predetermined control plane protocol in the network. The predetermined control plane protocol is operated by a plurality of other devices in the network to obtain Layer 2 information on the basis of known Layer 3 information. The first device does not operate the predetermined control plane protocol in the network. At the first device, in response to identifying that a given snooped packet was generated according to the predetermined control plane protocol. Layer 3 information associated with a second device in the plurality is extracted from the given snooped control plane protocol packet on the basis of known Layer 2 information associated with the second device. The second device is connected to the first device.