公开(公告)号：US20240348475A1

公开(公告)日：2024-10-17

申请号：US18318687

申请日：2023-05-16

Applicant: Microsoft Technology Licensing, LLC

Inventor： Paul David MATTES ,  Umesh KRISHNASWAMY ,  Ashlesha ATREY ,  Guruprasad Bangalore HIRIYANNAIAH

IPC: H04L12/46 ,  H04L43/10 ,  H04L45/50 ,  H04L45/745

CPC classification number: H04L12/4633 ,  H04L43/10 ,  H04L45/50 ,  H04L45/745

Abstract: Bi-directional tunnel probing in a network may be extended to multi-realm networks, providing bi-directional probing in a multi-realm network. Bi-directional probing uses probe packets with a forward tunnel label, a reverse tunnel label, and an IP packet header. Bi-directional probing in a multi-realm network uses a forward tunnel label, an SID, a reverse tunnel label, and an IP packet header. Penultimate hop popping strips the outermost labels in a specific order. The SID gets the probe packet back into the originating realm, and the reverse tunnel label returns the probe packet along the reverse direction of the tunnel. No SID is needed for intra-realm probing, and the IP packet header is used to return the probe packet if the reverse tunnel label is absent.

公开(公告)号：US20240388469A1

公开(公告)日：2024-11-21

申请号：US18320944

申请日：2023-05-19

Applicant: Microsoft Technology Licensing, LLC

Inventor： Luis IRUN-BRIZ ,  Umesh KRISHNASWAMY ,  Himanshu RAJ ,  Paul David MATTES

IPC: H04L12/46 ,  H04L41/0816 ,  H04L45/00 ,  H04L47/125

Abstract: Solutions are disclosed that enable capacity-aware local repair of tunnels in packet switched wide area networks (WANs). Traffic engineering agents on the routers are programmed to create the tunnels and include sets of primary and alternate tunnels sharing the same source and destination. A tunnel source router is provided a traffic split for allocating incoming traffic to its primary and alternate tunnels for when the primary tunnel is operating at or near full capacity operation, and another traffic split that shifts at least some traffic from the primary tunnel to the alternate tunnel, when the primary tunnel's capacity drops below a threshold. A tunnel may lose capacity for commonly-occurring reasons, such as a disturbance to cabling and faults in optical transceivers. Traffic engineering agents along the tunnel report capacity to the tunnel source router, permitting the network to respond to capacity changes more rapidly than waiting for network tunnel reconfiguration.

公开(公告)号：US20240137319A1

公开(公告)日：2024-04-25

申请号：US18101291

申请日：2023-01-25

Applicant: Microsoft Technology Licensing, LLC

Inventor： Paul David MATTES ,  Umesh KRISHNASWAMY ,  John Michael ABELN ,  Sonal KOTHARI ,  Paul-Andre C. BISSONNETTE ,  Pappula Prabhakar REDDY ,  Himanshu RAJ

IPC: H04L47/125 ,  H04L45/00 ,  H04L45/50

CPC classification number: H04L47/125 ,  H04L45/34 ,  H04L45/50 ,  H04L2212/00

Abstract: A method and a network for routing data packet in a unified wide area network (WAN) is provided. The method includes encapsulating a data packet by an ingress aggregation router and forwarding the encapsulated data packet to an ingress backbone router. The encapsulated data packet includes a first label. The ingress backbone router selects an optimized traffic engineered tunnel and replaces the first label with the optimized traffic engineered tunnel and forwards the encapsulated data packet along the optimized traffic engineered tunnel.