Dynamically triggered traffic engineering routing advertisements in stateful path computation element environments

摘要

In one embodiment, a device (e.g., a path computation element, PCE) monitors a tunnel set-up failure rate within a computer network, and determines whether to adjust an accuracy of routing information based on the tunnel set-up failure rate. For instance, the tunnel set-up failure rate being above a first threshold indicates a need for greater accuracy. In response to the tunnel set-up failure rate being above the first threshold, the device may then instruct one or more routers to shorten their routing update interval in the computer network.

主权项

1. A method, comprising:
receiving, at a device, one or more stateful path computation notifications, wherein a particular notification identifies a link for which a tunnel set-up request failed and a percentage of bandwidth by which the request could not be satisfied; monitoring, by the device, a tunnel set-up failure rate within a computer network by analyzing the received one or more notifications; determining, by the device, whether to adjust an accuracy between actual and advertised bandwidth booking information in the network based on the tunnel set-up failure rate, wherein the tunnel set-up failure rate being above a first threshold indicates a need for greater accuracy; and in response to the tunnel set-up failure rate being above the first threshold, instructing, by the device, one or more routers to shorten their routing update intervals during which their bandwidth booking information is advertised in the computer network by causing the one or more routers to use at least one additional bandwidth booking change threshold, wherein the one or more routers advertise their bandwidth booking information in response to a particular bandwidth booking change threshold being crossed, and wherein the at least one additional bandwidth booking change threshold is determined based on the percentage of bandwidth by which the tunnel set-up request could not be satisfied.