公开(公告)号：US20130151445A1

公开(公告)日：2013-06-13

申请号：US13759567

申请日：2013-02-05

Applicant: AT&T Intellectual Property I, L.P.

Inventor： James Uttaro

IPC: G06N99/00

CPC classification number: H04L41/0668 ,  H04L43/0811 ,  H04L45/02 ,  H04L45/04 ,  H04L45/28

Abstract: A system and method for retaining routes in a control plane learned by an inter-domain routing protocol in the event of a connectivity failure between routers. Routers are classified as either route reflectors or originators. A determination is made whether the connectivity failure occurred between a route reflector and an originator, two originators, or two route reflectors. A determination is then made whether to propagate a withdrawal of learned routes based on whether the connectivity failure occurred between a route reflector and an originator, two originators, or two route reflectors. A withdrawal of learned routes is propagated to neighboring routers if the connectivity failure occurred between two originators, or between a route reflector and an originator that is inaccessible via an intra-domain routing protocol. No withdrawal of learned routes is propagated if the connectivity failure occurred between two route reflectors, or between a route reflector and an originator that is accessible via an intra-domain routing protocol.

Abstract translation: 在路由器之间发生连接故障的情况下，保留由域间路由协议学习的控制平面中的路由的系统和方法。 路由器被归类为路由反射器或发起者。 确定路由反射器和发起者，两个发起者或两个路由反射器之间是否发生连接故障。 然后，基于路由反射器和发起者，两个发起者或两个路由反射器之间是否发生连接故障，确定是否传播学习路由的撤销。 如果连接失败发生在两个发起者之间，或路由反射器与通过域内路由协议无法访问的发起者之间，则将学习路由的撤销传播到相邻路由器。 如果在两个路由反射器之间发生连接故障，或路由反射器和可通过域内路由协议访问的发起者之间，则不会传播学习路由的撤销。