Convergence in a packet-switching network is an automatic process of network mapping that occurs after a router is switched on. A router is a device, usually a dedicated computer, that reads each incoming packet, and determines where to send it next. In carrying out this process, the router needs an accurate map of the networks to which it is directly connected. If this map had to be updated manually, organizations would have to devote a considerable amount of time and human resources to the job. Convergence software enables the router to detect changes to the network, such as the addition or removal of workstations, and to adjust its map automatically. The process is called so because it takes a few minutes for the router’s map to “converge” to reality (the current state of the network).
Technipages Explains Convergence
Convergence is a state wherein routers come to a consensus as to the best path for sending packets, and this is done to complete a routing table. A routing table is a table set of data, it shows the best passage from which data packets can take, and it exists over an internet protocol (IP) network. Devices that have the compatibility of Internet protocol, these devices use the routing table. Examples include routers, webcams, security cameras, etc.
A router is an electronic device that allows internet sharing, which could take Ethernet connections or a WiFi connection. It is a gateway between the internet and computers. For a router to work, it must be connected to Internet service, this could be through and Internet service provider or a modem.
When routers converge, it simply means all the routers have the same routing table, such that when there is an update in a routing table, all the routers update their routes to show the new change. The time taken for all routers to align with the change in route is called convergence time. This is dependent on several things such as the size of the network, network design, and the routing protocol in operation. For a network to be usable, convergence must have occurred, and this is why routing protocols require a short time for convergence.
Common Uses of Convergence
- Before convergence occurs, all the routers must have adjusted their routing tables to a newer change.
- The convergence took more time than it does normally because of the increased number of components now in the network
- Convergence takes a short time to occur, and this is important as usability of a network hinges on it
Common Misuses of Convergence
- Convergence time has nothing to do with the number of objects in the network