Patent ID: 8717893
Filing Date: 2014-05-06
Classification: H04L

Abstract:
1. A method, comprising: monitoring, by a network node, traffic through a queue associated with an output port of the network node, detecting, by the network node and based on the monitoring for dropped packets, one or more critical packets from a group of critical and non-critical packets that are dropped at the queue; adjusting, by the network node and based on the detecting the one or more critical packets, differentiated services (DiffServ) drop threshold parameters of the queue, for the critical packets in the high-priority LSP, from an original threshold level to an adjusted level; increasing, by the network node and when more critical packets dropped at the queue are detected after the adjusting, a bandwidth reservation for the high-priority LSP; detecting, by the network node and based on the monitoring the buffer capacity levels, a congestion level above a congested threshold; and preempting, by the network node and based on the detecting the congestion level or increasing the bandwidth reservation, the low-priority LSP from the queue.