公开(公告)号：US20210051092A1

公开(公告)日：2021-02-18

申请号：US17083039

申请日：2020-10-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alvaro Retana ,  Uma S. Chunduri ,  Renwei Li ,  Toerless Eckert ,  Yingzhen Qu

IPC: H04L12/707 ,  H04L12/755 ,  H04L12/703

Abstract: A method implemented by a network element (NE) in a network, comprising receiving, by the NE, an advertisement comprising preferred path route (PPR) information and backup PPR information, the PPR information describing a PPR between a source and a destination in the network, the backup PPR information describing a backup PPR between the source and the destination, the PPR information comprising a PPR identifier (PPR-ID) and a plurality of PPR description elements (PPR-PDEs) each representing an element on the PPR, updating, by the NE, a local forwarding database to include the PPR information and the backup PPR information in association with a destination address of the destination, and transmitting, by the NE, a data packet based on the backup PPR information instead of the PPR information in response to an element on the PPR being unavailable due to a failure of an element along the PPR.

公开(公告)号：US20210044537A1

公开(公告)日：2021-02-11

申请号：US17078838

申请日：2020-10-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Uma S. Chunduri ,  Renwei Li ,  Alvaro Retana ,  Alexander Clemm ,  Lin Han ,  Yingzhen Qu

IPC: H04L12/911 ,  H04L12/751 ,  H04L12/741 ,  H04L12/715

Abstract: A method implemented by a network element (NE) in a network receiving, by the NE, an advertisement comprising preferred path route (PPR) information describing a path from an ingress NE to an egress NE in the network, the PPR information comprising a PPR identifier (PPR-ID) and an attribute associated with a resource to be reserved on the PPR, transmitting, by the NE, the advertisement comprising the PPR-ID and the attribute associated with the resource to be reserved on the PPR to another NE in the network, and updating, by the NE, a local forwarding database to include the PPR information in association with the egress NE in response to the NE being identified in the PPR information.