Patent ID: 9699087
Date: 2017-07-04
CPC Classifications: H04L

Claim:
1. A method comprising: generating, at an intermediate node contained in a data network, an advertisement message having one or more type-length-value (TLV) objects including at least a first indicator and a second indicator, the first indicator corresponding to a first Differentiated Service Traffic Engineering (DS-TE) class associated with the intermediate node and the second indicator corresponding to a second DS-TE class associated with the intermediate node, wherein the first indicator, when set, indicates that an Out Of Resource (OOR) condition causing the intermediate node to reject a new Label Switched Path (LSP) for the first DS-TE class has been detected, and the second indicator, when set, indicates that an OOR condition causing the intermediate node to reject the new LSP for the second DS-TE class has been detected; in response to detecting a first OOR condition on the intermediate node for the first DS-TE class, setting the first indicator; and after setting the first indicator, broadcasting the advertisement message on the data network, thereby causing a head-end node to avoid using the first DS-TE class of the intermediate node in the new LSP.