Recently, I was on a Juniper device, trying to figure out why I was getting a lower bit rate even though I knew I was sending a lot more.
Then it hit me that Juniper devices show the Layer 3 transmit rate, whereas I was sending at a Layer 2 bit rate. It has been a while since I have encountered this, and I used to be able to do a calculation to estimate the Layer 3 bit rate based on the Layer 2 bit rate using the frame-size (Ethernet, VLAN).
However, I cant seem to remember how I did that calculation, nor can I find any examples or documentation on the conversion.
Can anyone highlight how this calculation is done (preferably with an example)? Lets say a L2 bit rate of 100 Mbps, and a frame size of 70 MB.