At low frame size I see that the amount of traffic passed in...

<< Back to: comp.dcom.cell-relay FAQ: ATM and related technologies (part 1/8)

Question by satish
Submitted on 2/10/2006
Related FAQ: comp.dcom.cell-relay FAQ: ATM and related technologies (part 1/8)
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At low frame size I see that the amount of traffic passed in very low. I have FR-ATM switch. I have configured FR-FR inter board PVC with Bc=CIR=128000bits and Be=1856000bits. My traffic should flow up to Be. I see that when I set frame size=1600 bytes in my traffic generator and pass traffic I am able to pass traffic upto Be. But if I reduce framesize = 65bytes I see traffic passes up to only 1280kbps. This I assume that there is internally frame to cell mapping. I know how address part is mapped. My doubt is how frame data is mapped to cell data. How is the mapping performed. In case of cell it is 53 bytes fixed cell. If 5 bytes of address is removed so left is 48 bytes. So if i am passing 65 bytes of frame how is it mapped to cell. what is that causing at small frame length I see more drops.I hope this is something related to overhead? Any suggestions or clarification in this regard is highly is appreciated. regards satish

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<< Back to: comp.dcom.cell-relay FAQ: ATM and related technologies (part 1/8)

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