QoS controlling for IBM Network Processor based Gigabit Metro Switch

Recently, Gigabit-Ethernet is rapidly deployed, for the requirement of providing high-speed access technology on service provider, easy and simple management with legacy Ethernet, and to be line-up from Ethernet to 10G Ethernet with standardization of IEEE. Furthermore, very high scaled MAN(MetroPolitian Network) has constructed on several country by Gigabit Ethernet and also made main streams of network connection technology, so called MetroEthernet. Gigabit-Ethernet switch to provide wirespeed classification and forwarding is required NP(Network Processor)s. Contemporary many NPs have diffserv-based intrinsic QoS technologies which are multi-field classification, DiffServ attributes marking, flow metering, flow measuring, packet dropping, packet scheduling, DSCP(DiffServ Code Point) remarking, etc. In this paper, we provide control mechanisms which are consisted of resource management, flow control, flow classification, and output buffer management on developing IBM NPbased Metro-Ethernet switch. Such control mechanisms are similar to cisco, developing by C language on zebra based router, and runs on embedded Linux system.