In this paper we propose an efficient resource management technique for MPLS-based DiffServ networks. The service provider (SP) can predict sufficient link bandwidth resources for traffic caused by contracting of SLAs (Service Level Agreement). It could be an important part of admission control in the SLA negotiation process (SLA-creation). Such bandwidth expansion and bandwidth sharing technique can be an important part of TEQUILA architecture based on autonomic computing. The problem is seen as an expansion problem of link capacities (bandwidth) that can be done dynamically from NP (network provider). Also, it helps to avoid the creation of bottleneck links on the path and maintains high network resource utilization efficiency.