Computer networks have played a central role at any circumstances in society today. So it is necessary for them to be available at any time. To this end we often use redundant technologies such as duplex systems to overcome failures. Virtual Router Redundancy Protocol (VRRP) is one of the redundant technologies, which gives detours to end hosts in case of trouble. Because of its advantages such that end hosts have no requirement for using VRRP it has been widely used in many Local Area Networks. In this paper we propose a new method on VRRP. Our method makes VRRP convergence time shorter in a typical network design: it means that through using our method computer networks recovery faster when failures occurred.
Like other technologies such as Internet Protocol (IP) or Transmission Control Protocol (TCP), an Ethernet frame also has a field to detect some errors occurred on transmission. This field is referred to as frame check sequence (FCS). Usually, when an Ethernet frame conveys extra information on some feature such as VLAN (Virtual Local Area Network), a field called tagis inserted into the frame and FCS must be recalculated. In this paper we propose a method for calculating a frame check sequence in a tagged frame effectively. Our method utilizes the relationship between an Ethernet frame and its tagged Ethernet frame on FCS. And it is also shown that in most cases the FCS in a tagged Ethernet frame can be easily obtained by just adding the pre-calculated result to the FCS in an original Ethernet frame.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.