Design and simulation of OSPF routing protocol fuzzy model by two costraint: Bandwidth and queue size of router

Expanded use of the computer, their connectivity, network complexity of computers and the users needs of services quality has varied. Routing in throughways has a significant role in optimal transmission of informational packet transportation. OSPF is one of the optimal routing protocols in compare with its counterpars, RIP. It seems that routing is not enough to express the real state of the link just by a criterion. There is usually a concern about informational packages accuracy of the state advertisement. Exactness of the foregoing information is predetermined to update the network state by the time interval. So it is probable some inaccurate information enter routing process due to the absence of mentioned parameter frequency registration. So it is more practical to let another parameter other than that mono-criterion cooperates in expressing the link state not to emerge a problem of demonstrative/expressive information exactness of the network state in this research we analyze the combination of two parameter bandwidth link and router queue length related to the same link to establish a fuzzy metric with the help of a simple fuzzy algorithm. Committed simulation simulator environment NS-2 shows better results in Linux system after trying various scenarios in comparison to the OSPF mono-criterion method.