Abstract
SDN (Software-Defined Networks) is an incipient architecture of decoupling control plane and data plane involved in dynamic management of network. SDN is being installed in production based networks which ultimately lead to the need of secure and fault tolerant SDN. In the present investigation, we are discussing about the kind of failures with label happen in SDN. A critical survey based on the recently proposed mechanisms for handling failures in SDN. Initially, we discussed with the help of tabular data involving mechanism of data plane failure. We also discussed the various mechanisms for handling misconfiguration of drift able of switches and control plane failure handling mechanisms. We also epitomize issues with both data and control plane mechanism that are discussed earlier. In the end, we are stating that there is need of build much efficient and secure mechanism for SDN networks.
Highlights
The whole activities are connected by internet or networking
The current network architecture is not suited for changing patterns, applications and user demand
A controller manages the flow flowing through the data plane [1] [2]
Summary
The whole activities are connected by internet or networking. The internet is composite of the large set of devices e.g. switches, routers, servers and host systems. A network consists of router and switches. A network consists of the set of protocols which are statically defined in routers and switches. Current network architecture only partly meets today’s requirement for enterprises carriers and end users. Control and forwarding rules are defined statically in routers. A controller manages the flow flowing through the data plane [1] [2]. Open Flow [3] is a communication protocol that network switch over the network or forwarding plane of a router. Open Flow defines standard of all event processing between control plane controller and data plane switch/router. SDN is depended on controller function if the controller fails it will stop everything except the traffic flowing through switches as per already install rules in flow table before controller fails.
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