Question about TBF burst parameter

["A.M. Sabuncu" <amsabuncu@xxxxxxxxx>]

Hi,

I am a completely newbie, and have been doing intense reading for the entire last week, and have the following novice question:

In section 9.2.2.2. of LARTC HOWTO, the following sample configuration given:

# tc qdisc add dev ppp0 root tbf rate 220kbit latency 50ms burst 1540

Why is the burst parameter value determined to be 1540?

Thanks,

Todd
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