Hi Deepak, The answer to you question what I feel is as follows. Its not that after full congestion only Frame-relay Switch starts setting bit FECN or BECN.When ever the traffic rate exceeds the threshold value some percentage of it Then the switch informs the sender/reciver that it should decrease the sending rate.Its not that link is fully congested then only it will send before hand it takes proactive action . This is what I think. Regards, Munit Deepak Achar wrote: > > Hi all > I have very basic doubt regarding the frame-relay > congestion control. > > I have two routers which are connected thro' FR network.This is > as follows > > > R1---------------FR cloud-------FR cloud------------------R2 > > Now suppose the congestion is occuring in the path R1 to R2 and > there is no congestion in the path from R2 to R1. > According to theory, FR network will set the FECN bit to a 1 > in those frames that r going form R1 to R2. The FR network will > set the BECN bit to a 1 in those frames that r going from R2 to > R1. > My thinking is if the network is already congested, would the > frames be discarded before they reach the other end. If this is > true, how will the other end router would come to know that the > congestion is happening in the path. > If the its not true, then how will those frames, with FECN > and BECN bit set to 1, reach the FR routers at the end, even > though there is congestion in the path. > I am confused regarding this. Please can anyone helpme out in > this regard. > > Regards > Deepak
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