From: vmashburn@fedex.com
Date: Wed Nov 02 2005 - 12:21:20 GMT-3
Does anyone know how to interperate the formula for tuning the tx-ring queue? Cisco's formula doesn't make any sense to me. They say to use the following:
((Packet Size (bits) *8) * (tx-queue depth))/(interface bandwidth (bps))
However, I have a couple of issues with this formula.
1) What is meant by the tx-ring queue depth? ( I assume it means the current size of the queue, but not sure).
2) The units of the result do not make sense. You have (bits(packet size) * bits (queue size))/(bps(bandwidth)). The resulting unit is bit-seconds. I am not aware of any physical unit that is measured in bit seconds.
Can anyone help out here?
Thanks
Vince
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