In this article we will discuss Redundancy in a Small Network, will make brief discussion on Redundancy in a Small Network, In last article we discuss about IP Addressing for a Small Network.
Network redundancy is a process through which additional or alternate instances of network devices, equipment and communication mediums are installed with in network infrastructure. It is a method for ensuring network availability in case of a network device or path failure and unavailability.
Another important part of network design is reliability. Even small businesses often rely heavily on their network for business operation. A failure of the network can be very costly. In order to maintain a high degree of reliability, redundancy is required in the network design. Redundancy helps to eliminate single points of failure.
There are many ways to accomplish redundancy in a network. Redundancy can be accomplished by installing duplicate equipment, but it can also be accomplished by supplying duplicate network links for critical areas, as shown in the figure.
If one server fails, another is there to handle customer requests.
If the link to one switch fails, the link to the second switch is still available.
Redundant switches are present to avoid a switching failure.
Router redundancy can help to ensure that application transactions received from external traffic can be handled in the event of a router or route failure.
Small networks typically provide a single exit point toward the Internet via one or more default gateways. If the router fails, the entire network loses connectivity to the Internet. For this reason, it may be advisable for a small business to pay for a second service provider as backup.