QOS - Calculating bandwidth

[LADONNA EVANS-DUHART]

If i have a 50 Meg pipe for my wan and I have X amount of data that is tranmitted over the circuit a week, how do I calculate the amount of data that should be reserved for that traffic.  The traffic include voice.  I know we can use a LLQ.  I am currently sending  9.1 Gigabytes.  Is there a typical formula that can be used so that I can figure out how much bandwidth the allocate out of my 50 Meg circuit.

[Joseph W. Doherty]

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Cisco's recommendation is to allocate about 1/3 your bandwidth for LLQ.  If your actual LLQ traffic uses less, the excess is available to other traffic.  If the LLQ traffic actually uses more, you'll need a bigger pipe.  (NB: In my experience, LLQ traffic can usually allocate up to 40% without issues.)