Patent ID: 8264962
Filing Date: 2012-09-11
Classification: H04L

Abstract:
1. A method for dynamically resizing Traffic Engineering (TE) Label Switched Paths (LSPs) at a head-end node of the TE-LSPs in preparation to receive redirected traffic in response to an event in a computer network, the method comprising: maintaining, by the head-end node, steady state TE-LSP sampling and resizing frequencies, wherein a TE-LSP sampling frequency is a frequency at which an amount of traffic on one or more TE-LSPs is measured, and a TE-LSP resizing frequency is a frequency at which one or more TE-LSPs are resized, the TE-LSP resizing frequency being a lower frequency than the TE-LSP sampling frequency; detecting an event in the computer network identifying possible traffic redirection; in response to the detecting, entering a Fast Resize (FR) state, in which TE-LSP sampling and resizing frequencies are increased from the steady state TE-LSP sampling and resizing frequencies to FR state TE-LSP sampling and resizing frequencies, to speed adaptation of a TE-LSP bandwidth to accommodate any received redirected traffic; and after the FR state is completed, returning to using the steady state TE-LSP sampling and resizing frequencies.