What is the inner gate protocol?
The interior gate protocol (IGP) is a method for network administrators to handle the routing of a computer network from one part of the controlled network to another. The internal gate protocol is only necessary if there are multiple routers that need to be traveled for operation to bypass the network. In cases where IGP is necessary, the network is referred to as an autonomous system (AS). IGP is therefore responsible for securing all routers in AS know, how to move each other to their destinations. This differs from the outer gate protocol, which is responsible for directing the operation or entering the specific as.
The internal gate protocol is considered to be a dynamic routing protocol for its ability to automatically update the routing information for each router. Compared to the static method in which the administrator is required to manually update each router, IGP is significantly more useful for larger mesh of the messenger; The static method is best for smaller or disposable networks. There are several typesProtocols of the inner gate, which fall into several general classifications.
The distance and vector routing protocol is based on an algorithm in which each router calculates the shortest path to the goal by calculating the number of other router data to achieve the target. The routers send messages to each other to portray the path where each other router meets as one "hop" along the road. The path with the smallest hops is then known as the preferred route for data packets. If the router in this path goes off-line, the router is looking for another route of the lowest number of hop and so on.
One of the disadvantages is that the protocols of the inner gate based on the direction of the distance vector may have problems with delay. Each time the new router -strokes or removed from AS, it must reinstate all routers to determine the shortest path. Time delay occurs because the routers await three minutesThose before they give up the preferred paths and start the process of convergence by searching for a new way. The direction of IGP of the distance vector also has no knowledge of whether the reference to a particular router is faster than another and relies only on the number of hops as an ideal way.
The second type of internal gate protocol is the connection method. In the Link-State protocol, every router shares a little more information. When each router talks to a different one, it creates a database containing information about other routers in AS, including the speed at which the communication between routers lasts. The database is then processed in each router and the routing tables are developed. With IGP with AS connection state, it is able to undergo rapid changes and is able to quickly redirect various other routers if one route becomes available; Conversion in the interconnection protocol is happening in seconds, as opposed to minutes.
Inner gateway protocols for link-state also have the disadvantage of havingThe tendency to use larger computational resources compared to their cousins in the distance vector. The routers in AS do many calculations while running during convergence, as well as collecting and maintaining a large amount of information, so they tend to use more processor performance and memory. If the network using the connection method experiences frequent removal or adding routers, it can be taxed because convergence quickly floods routers and with new information. As work, routers are divided into hierarchies where only routers converge each other in a certain group. The backbone router, called the border area (ABR), then converges with other ABRS to complete convergence across AS.
Some of the Amix of both types is Enhanced Interior Gateway Rules (EIGRP). Although EIGRP is proprietary for Cisco Systems routers, both methodologies take into account. In Eirgp AS, the routers store several possible routes to the target and first use the best route if this route is note available. At that moment, the router immediately falls back to the secondary route. In addition to the number of hops calculated on the route, Eigrp also stores information about the bandwidth and speed between the hops.