公开(公告)号：US20130286822A1

公开(公告)日：2013-10-31

申请号：US13925234

申请日：2013-06-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Tao LIU ,  Guangdong ZHU ,  Hua TAN ,  Tao ZHOU

IPC: H04L12/24

CPC classification number: H04L41/0654 ,  H04L41/0663 ,  H04L45/04 ,  H04L45/22 ,  H04L45/28

Abstract: Embodiments of the present disclosure provide a method and device for establishing backup path, a method and device for selecting backup path. The method comprises a first node in a first IGP domain receiving a response message of successful establishment of a main path from a second node in a second IGP domain through the main path; the first node obtains path information of the main path from the response message; the path information of the main path includes at least SRLG information of a link composing the main path; the first node establishes, according to the path information of the main path, a backup path between the first node and the second node; the SRLG information of a link composing the backup path is different from the SRLG information of the link composing the main path.

Abstract translation: 本公开的实施例提供了用于建立备份路径的方法和设备，用于选择备份路径的方法和设备。 该方法包括第一IGP域中的第一节点，接收通过主路径从第二IGP域中的第二节点成功建立主路径的响应消息; 第一节点从响应消息获取主路径的路径信息; 主路径的路径信息至少包括构成主路径的链路的SRLG信息; 第一节点根据主路径的路径信息建立第一节点和第二节点之间的备用路径; 构成备份路径的链路的SRLG信息与构成主路径的链路的SRLG信息不同。