公开(公告)号：US20220210051A1

公开(公告)日：2022-06-30

申请号：US17699237

申请日：2022-03-21

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Patrice Brissette ,  Luc Andre Burdet ,  Jiri Chaloupka ,  Mei Zhang ,  Tarek Saad

IPC: H04L45/00 ,  H04L45/50 ,  H04L45/28

Abstract: A method, network device, and computer program product for network traffic diversion are disclosed. In one embodiment, a method according to the present disclosure includes receiving a frame at a core edge node that is a member of a redundancy group (where the frame comprises network address information and a packet), and determining whether a link (to which the core edge node is communicatively coupled) is affected by a network failure. The frame was sourced by a remote core edge node that is not a member of the redundancy group, and the network address information indicates that the packet is to be forwarded via the link. In response to the link being affected by the network failure, the method further includes generating a modified frame and forwarding the modified frame to another core edge node. The generating comprises including a redirect label in the modified frame. The another core edge node is another member of the redundancy group.

公开(公告)号：US20210152464A1

公开(公告)日：2021-05-20

申请号：US16686896

申请日：2019-11-18

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Patrice Brissette ,  Luc Andre Burdet ,  Jiri Chaloupka ,  Mei Zhang ,  Tarek Saad

IPC: H04L12/707 ,  H04L12/703 ,  H04L12/723

Abstract: A method, network device, and computer program product for network traffic diversion are disclosed. In one embodiment, a method according to the present disclosure includes receiving a frame at a core edge node that is a member of a redundancy group (where the frame comprises network address information and a packet), and determining whether a link (to which the core edge node is communicatively coupled) is affected by a network failure. The frame was sourced by a remote core edge node that is not a member of the redundancy group, and the network address information indicates that the packet is to be forwarded via the link. In response to the link being affected by the network failure, the method further includes generating a modified frame and forwarding the modified frame to another core edge node. The generating comprises including a redirect label in the modified frame. The another core edge node is another member of the redundancy group.

公开(公告)号：US10554549B1

公开(公告)日：2020-02-04

申请号：US15421268

申请日：2017-01-31

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Suresh Doddagaddavalli Basavarajappa ,  Kalpesh Kirtikant Zinjuwadia ,  Arjun Sreekantiah ,  Neeraj Malhotra ,  Patrice Brissette

IPC: G06F15/173 ,  H04L12/741 ,  H04L12/46 ,  H04L29/08 ,  H04L12/751

Abstract: Aspects of the embodiments are directed to methods, systems, and computer program products for stitching route targets between disparate virtual private network domains. Embodiments are directed to a datacenter interconnect (DCI) network element that is configured to receive from a first network node of a first domain a routing prefix comprising a first route target value; determine that the first route target value is associated with a first route target set, the first route target set associated with the first domain; determine a corresponding second route target set associated with a second domain; create a second routing prefix that includes one or more route target values from the second route target set; and transmit the second routing prefix to a network node in the second domain.

公开(公告)号：US20200004635A1

公开(公告)日：2020-01-02

申请号：US16567953

申请日：2019-09-11

Applicant: Cisco Technology, Inc.

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

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

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：US20190215267A1

公开(公告)日：2019-07-11

申请号：US15866176

申请日：2018-01-09

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Ahmed Refaat Bashandy ,  Syed Kamran Raza ,  Darren Dukes ,  Patrice Brissette ,  Jisu Bhattacharya

IPC: H04L12/721 ,  H04L12/755 ,  H04L12/741

CPC classification number: H04L45/566 ,  H04L45/021 ,  H04L45/34 ,  H04L45/741 ,  H04L45/745

Abstract: In one embodiment, segment routing (SR) network processing of packets is performed on packets having a segment identifier structure providing processing and/or memory efficiencies. Responsive to an identified particular segment routing policy, the particular router retrieves from memory a dynamic segment routing identifier portion of the particular SR policy that includes a SR node value and a SR function value. The SR function value identifies segment routing processing to be performed by a router in the network identified based on the SR node value. A segment routing discriminator is independently identified, possibly being a fixed value for all segment identifiers in the network. Before sending into the network, a complete segment identifier is added to the particular packet by combining the segment routing discriminator with the dynamic segment routing identifier portion. The particular packet including the complete segment identifier is sent into the network.

公开(公告)号：US20190149456A1

公开(公告)日：2019-05-16

申请号：US15809140

申请日：2017-11-10

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Ali Sajassi ,  Ramanathan Lakshmikanthan

IPC: H04L12/703

Abstract: Local switching may be provided over a flexible cross-connect VLAN-aware based service. First, a failure of a first segment link of a first segment may be detected by a first network device. The first segment may have a first segment identifier and the first segment link may be connected to the first network device. Next, a route withdraw indicating the first segment identifier may be sent by the first network device in response to detecting the failure of the first segment link of the first segment. A second network device may then receive the route withdraw. Then, the second network device may forward, in response to receiving the route withdraw, traffic received from the first network device to a second segment link of the first segment connected to the second network device. The traffic may be received from the first network device over a backup connection over an Ethernet Virtual Private Network (EVPN) core.

公开(公告)号：US10116467B2

公开(公告)日：2018-10-30

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

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：US09858150B2

公开(公告)日：2018-01-02

申请号：US14750311

申请日：2015-06-25

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

CPC classification number: G06F11/1423 ,  H04L45/22 ,  H04L45/28 ,  H04L45/745

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：US09853833B2

公开(公告)日：2017-12-26

申请号：US15156093

申请日：2016-05-16

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Vibov Bhan ,  Ali Sajassi ,  Sami Boutros

IPC: H04L12/46 ,  H04L12/715 ,  H04L12/721 ,  H04L12/66 ,  H04L12/833 ,  H04L12/931 ,  H04L12/723 ,  H04L29/06

CPC classification number: H04L12/4662 ,  H04L12/4641 ,  H04L12/4666 ,  H04L12/66 ,  H04L29/06068 ,  H04L29/06612 ,  H04L45/04 ,  H04L45/50 ,  H04L45/66 ,  H04L45/68 ,  H04L49/354 ,  H04L63/0272 ,  H04L69/08 ,  H04L69/26

Abstract: In one embodiment, a plurality of virtual private local area network services (VPLSs) are operated among a plurality of packet switching devices, with the plurality of VPLSs including a first VPLS and a different second VPLS. In response to a conversion declaration including a particular Service Instance VLAN ID (I-SID), the first VPLS corresponding to the particular I-SID is converted to a different type of virtual private network (VPN) service, while continuing to operate the different second VPLS which is not related to the particular I-SID. In one embodiment, the different type of VPN service is Provider Backbone Bridging Ethernet VPN (PBB-EVPN). In one embodiment, the conversion declaration is a Border Gateway Protocol (BGP) Network Layer Reachability Information (NLRI) of Route Type 3 Inclusive Multicast Ethernet Tag (IMET) route.

公开(公告)号：US09838310B1

公开(公告)日：2017-12-05

申请号：US14920727

申请日：2015-10-22

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/56 ,  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.