Routing plays very significant role to advertise the route of one network to another network as well to find the best path between sources to destination. In computing environment so many routing protocol like EIGRP and OSPF are used for sending IP packet from source to destination. But different routing protocol used different routing algorithm to find best path between sources to destination node. Whereas EIGRP is a Cisco Proprietary protocol that runs only Cisco router and OSPF is non Cisco Proprietary protocol that runs. So packet of EIGRP network cannot reach to OSPF network. So this research paper mainly focuses on to solve this problem by using Route Redistribution technique. Route redistribution (RR) has become an integral part of IP network design. Using this technique we can optimize the network by advertising the EIGRP route to OSPF network and vice versa.

In this paper, assuming Intensity-Modulation/Direct Detection (IM/DD) with On-Off Keying (OOK), a novel expression for average BER of FSO over Exponentiated Weibull (EW) atmospheric turbulence channel is derived. In the free space optical (FSO) channel the optical signal suffers from irradiance and phase fluctuations caused by the atmospheric turbulence, which results in Bit Error Rate (BER) performance degradation. We investigate the aperture-averaging effect on BER performance under weak and moderate turbulence regime. In our work we consider EW distribution which is more accurate in the presence of finite-size receiving apertures under weak and moderate turbulence regime.Keywords ─ bit-error rate (BER), on-off keying (OOK), intesity modulation/direct detection (IM/DD), Exponentiated Weibull (EW) distribution, free space optical communication (FSO) , aperture averaging effect.

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