公开(公告)号：US20220103480A1

公开(公告)日：2022-03-31

申请号：US17032874

申请日：2020-09-25

Applicant: Cisco Technology, Inc.

Inventor： Luca Della Chiesa ,  Christian Schmutzer ,  Patrice Brissette

IPC: H04L12/803 ,  H04L12/911 ,  H04L12/891 ,  H04L12/707 ,  H04L12/46

Abstract: Techniques are presented herein for load-balancing a sequence of packets over multiple network paths on a per-packet basis. In one example, a first network node assigns sequence numbers to a sequence of packets and load-balances the sequence of packets on a per-packet basis over multiple network paths of a network to a second network node. The second network node buffers received packets that are received over the multiple network paths of the network from the first network node and re-orders the received packets according to sequence numbers of the received packets.

公开(公告)号：US11283906B2

公开(公告)日：2022-03-22

申请号：US16697134

申请日：2019-11-26

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Clarence Filsfils ,  Darren Dukes ,  Gaurav Dawra ,  Francois Clad ,  Pablo Camarillo Garvia

IPC: H04L29/06 ,  H04L69/22 ,  H04L69/324 ,  H04L45/00 ,  H04L67/10 ,  H04L45/50 ,  H04L12/46 ,  H04L45/74 ,  H04L61/5007 ,  H04L49/35 ,  H04L67/63 ,  H04L45/741 ,  H04L101/659 ,  H04L61/2503 ,  H04L43/028 ,  H04L45/745

Abstract: In one embodiment, Ethernet Virtual Private Network (EVPN) is implemented using Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) underlay network and SRv6-enhanced Border Gateway Protocol (BGP) signaling. A particular route associated with a particular Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) Segment Identifier (SID) is advertised in a particular route advertisement message of a routing protocol (e.g., BGP). The SID includes encoding representing a particular Ethernet Virtual Private Network (EVPN) Layer 2 (L2) flooding Segment Routing end function of the particular router and a particular Ethernet Segment Identifier (ESI), with the particular SID including a routable prefix to the particular router. The particular router receives a particular packet including the particular SID; and in response, the particular router performs the particular EVPN end function on the particular packet.

公开(公告)号：US20210014147A1

公开(公告)日：2021-01-14

申请号：US17039142

申请日：2020-09-30

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Ali Sajassi ,  Mei Zhang ,  Luc Andre Burdet

IPC: H04L12/751 ,  H04L12/825 ,  H04L12/741 ,  H04L12/723 ,  H04L12/18 ,  H04L12/24 ,  H04L12/703 ,  H04L12/761 ,  H04L12/46 ,  H04L12/721 ,  H04L12/66 ,  H04L12/705 ,  H04L12/803 ,  H04L12/931 ,  H04L12/911 ,  H04L12/927 ,  H04L12/801 ,  H04L29/06 ,  H04L29/14 ,  H04L29/08

Abstract: In one embodiment, a method according to the present disclosure includes receiving a topology change advertisement at a remote core edge node and performing a network address information removal operation. The topology change advertisement is received from a core edge node that is in communication with an access network. The topology change advertisement indicates that a topology change has occurred in the access network. The network address information removal operation removes network address information stored by the remote core edge node. The network address information is used by the remote core edge node in participating in communications with the core edge node.

公开(公告)号：US20190356581A1

公开(公告)日：2019-11-21

申请号：US16531211

申请日：2019-08-05

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Ali Sajassi

IPC: H04L12/703 ,  H04L12/46 ,  H04L12/413 ,  H04L12/707 ,  H04L12/715

Abstract: In one embodiment, a method includes, subsequent to receipt of a packet from a first customer network node destined for a second customer network node at a first provider network node, determining whether a local connection exists between the first provider network node and the second customer network node, the provider network node forming part of an Ethernet Virtual Private Network (“EVPN”)-Virtual Private Wire Service (“VPWS”) domain; if a local connection is determined to exist between the first provider network node and the second customer network node, determining whether the local connection has failed; if the local connection is determined not to have failed, switching the packet to the second customer network node via the local connection instead of via the EVPN-VPWS domain; and if the local connection is determined to have failed, switching the packet to the second customer network node via the EVPN-VPWS domain.

公开(公告)号：US10454814B2

公开(公告)日：2019-10-22

申请号：US15619301

申请日：2017-06-09

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Patrice Brissette ,  Ali Sajassi

IPC: H04L12/28 ,  H04L12/703 ,  H04L12/715 ,  H04L12/46 ,  H04L12/413 ,  H04L12/707

Abstract: In one embodiment, a method includes, subsequent to receipt of a packet from a first customer network node destined for a second customer network node at a first provider network node, determining whether a local connection exists between the first provider network node and the second customer network node, the provider network node forming part of an Ethernet Virtual Private Network (“EVPN”)—Virtual Private Wire Service (“VPWS”) domain; if a local connection is determined to exist between the first provider network node and the second customer network node, determining whether the local connection has failed; if the local connection is determined not to have failed, switching the packet to the second customer network node via the local connection instead of via the EVPN-VPWS domain; and if the local connection is determined to have failed, switching the packet to the second customer network node via the EVPN-VPWS domain.

公开(公告)号：US10417095B2

公开(公告)日：2019-09-17

申请号：US15795871

申请日：2017-10-27

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Jose A. Liste ,  Patrice Brissette ,  Mei Zhang ,  Vi Vu

IPC: H04W72/04 ,  G06F11/14 ,  H04L12/707 ,  H04L12/741 ,  H04L12/703

Abstract: Systems, methods, and computer-readable media for fast convergence for virtual ethernet segments in EVPN and PBB-EVPN networks are disclosed. A first provider edge (PE) device can receive one or more advertising messages corresponding to one or more virtual ethernet segments, wherein each of the one or more advertising messages can include a port identifier. The first PE device maintains a table including the one or more virtual ethernet segments and the corresponding port identifier. The first PE device can receive a failure message from a second PE device that identifies a first port on the second PE device, and identifies, based on the table, at least one affected virtual ethernet segment that is associated with the first port. The first PE device can remove any routes that are associated with the at least one affected virtual ethernet segment and trigger mass designated-forwarding election for impacted virtual ethernet segments.

公开(公告)号：US20180359178A1

公开(公告)日：2018-12-13

申请号：US15619301

申请日：2017-06-09

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Patrice Brissette ,  Ali Sajassi

IPC: H04L12/703 ,  H04L12/715 ,  H04L12/46

CPC classification number: H04L45/28 ,  H04L12/413 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/22

Abstract: In one embodiment, a method includes, subsequent to receipt of a packet from a first customer network node destined for a second customer network node at a first provider network node, determining whether a local connection exists between the first provider network node and the second customer network node, the provider network node forming part of an Ethernet Virtual Private Network (“EVPN”)—Virtual Private Wire Service (“VPWS”) domain; if a local connection is determined to exist between the first provider network node and the second customer network node, determining whether the local connection has failed; if the local connection is determined not to have failed, switching the packet to the second customer network node via the local connection instead of via the EVPN-VPWS domain; and if the local connection is determined to have failed, switching the packet to the second customer network node via the EVPN-VPWS domain.

公开(公告)号：US20180109400A1

公开(公告)日：2018-04-19

申请号：US15295674

申请日：2016-10-17

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Ali Sajassi

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

CPC classification number: H04L12/4633 ,  H04L12/4679 ,  H04L45/50 ,  H04L45/745

Abstract: Presented herein is an exemplified system and method that facilitate a point-to-point (P2P) service operation, via EVPN VPWS service tunnels, between customer edge nodes and provider edge nodes in a network infrastructure (e.g., a MPLS infrastructure). In particular, the exemplified system and method employ an EVPN BGP construct that facilitates multiplexing across large number of different physical interfaces, among multiple device manufacturers and vendors, while reducing signaling among the nodes, and being fully supportive of EVPN capabilities. In an embodiment, a method is disclosed that establishes VPWS Service service-tunnels, which is associated with an Ethernet virtual private network (EVPN) Ethernet Auto-Discovery (EAD) route identifies the service tunnel as being a VPWS-ID service, a single tag service, or a double tag service.

公开(公告)号：US20180048563A1

公开(公告)日：2018-02-15

申请号：US15795605

申请日：2017-10-27

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Jose A. Liste ,  Patrice Brissette ,  Mei Zhang ,  Vi Vu

IPC: H04L12/721 ,  H04L29/12

CPC classification number: H04L61/6022

Abstract: Systems, methods, and computer-readable media for flushing of Customer Media Access Control (C-MAC) addresses in a PBB-EVPN network are disclosed. A first provider edge (PE) device can maintain a plurality of service instances configured on a first interface. The first PE device can detect at least one failed ethernet virtual circuit (EVC) on the first interface and identify at least one service instance from the plurality of service instances that is associated with the at least one failed EVC. The PE device can send, to a second PE device, a C-MAC flush notification message that identifies the at least one service instance and the message can cause the second PE device to remove C-MAC addresses corresponding to the at least one service instance and the B-MAC address for the first interface.