The evaluation of VoIP QoS on DiffServ with VLAN networks

• Main Authors: Shu-Hwa Yeh, 葉淑華
• Other Authors: Wen-Kuang Chou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/3w7wd7

碩士 === 靜宜大學 === 資訊碩士在職專班 === 97 === Due to more and more popular of Internet, broadband technology was developed. Those make enterprises choose to use the VoIP for saving cost and the demand of VoIP has grown up gradually. However, the VoIP was implemented on Ethernet. Once traffic congestion happened on the network, the quality of communication will be influenced. Therefore, we need to do Qos on network. This thesis focuses on the application techniques and management to discover the characteristics of network protocol and the function of technology. Then, one way for regulating the traffic flow and security will be proposed. The way isolates voice traffic and data traffic on VLAN (Virtual Local Area Network) to avoid influence each other. The classifier and marker mechanism of DiffServ (Differentiated Service) are used to distinguish the service priority between voice and data traffic. Then we raise the priority on voice traffic to reduce the packet delay and lost. Using WRR (Weighted Round Robin Queue) to regulate traffic flow for the bandwidth can be fully used and taken into account transmission of other non-voice data flow at the same time. Besides, we experiment the feasibility of scheme to help network administrators to get a significant planning and configuration while setting up enterprise''s network for promoting the quality of VoIP.