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Thnx Jitendera. Can u give me ur mail id, my yahoo mail & messenger id is asdhir.kapil@yahoo.com. Myself kapil and working in Pioneers Group as a Server Admin. Thnx again Brother
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Answer / kapilasdhir
What is FECN {Forward Explicit Congestion Notification}?
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Answer / jitendera sinha
What is FECN {Forward Explicit Congestion Notification)
hi kapilashdhir
thanks for the question here is the i am trying to provide answer
fecn=this is a mechanism of frame really congestion control
as we know that in the frame realy mechanism we have some link of limted bandwidth
but if another link is available then we can use that link for our data forwarding.
suppose we are forwarding some data through farme realy network moere then our COMMTED RATE.NOW suddnly some link not avlable but we are not aware of that is there is congesstin in network we are continusly forwarding the data at the same rate.
what happen due to this a trafic congusstion will ocur
so for solving that problem two mechnaism come in acount
1 bemcn-bacward explict
2 fecn-forward explict
i hope it will help to understand the farme really technolgy
now how the both are working
i will explain it latter
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Answer / pachicoo
FECN=Forward Explicit Congestion Notification bit
Explicit congestion notification is proposed as the
congestion avoidance policy. It tries to keep the network
operating at its desired equilibrium point so that a
certain Quality of Service (QOS) for the network can be
met. To do so, special congestion control bits have been
incorporated into the address field of the frame relay:
FECN and BECN. The basic idea is to avoid data accumulation
inside the network. FECN means Forward Explicit Congestion
Notification. The FECN bit can be set to 1 to indicate that
congestion was experienced in the direction of the frame
transmission, so it informs the destination that congestion
has occurred. BECN means Backwards Explicit Congestion
Notification. The BECN bit can be set to 1 to indicate that
congestion was experienced in the network in the direction
opposite of the frame transmission, so it informs the
sender that congestion has occurred.
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