A Scheme to Monitor Maximum Link Load With Load Ranking
Changing routes to avoid a link whose load is heavy reduces the traffic congestion in an Open Shortest Path First Traffic Engineering (OSPF-TE) network. The information of the maximum link load is monitored for maintaining routes. A node advertises the link information in the network when the link load is changed. The network controller, which is one of the OSPF peers, updates routing to reduce the congestion using the received information. This paper proposes a scheme to reduce the number of advertisements needed by the network to control routing. In the conventional scheme, every node in the network keeps all link information. Every time a link load is changed, the ingress node of that link advertises the updated link information due to the OSPF update mechanism.