# BUFFER=<bytes>[/<bytes>] optional, default "10Kb/8"
#
# This parameter controls the depth of the token bucket. In other
# words it represents the maximal burst size the class can send.
# The optional part of parameter is used to determine the length
# of intervals in packet sizes, for which the transmission times
# are kept.
#
# LIMIT=<bytes> optional, default "15Kb"
#
# This parameter determines the maximal length of backlog. If
# the queue contains more data than specified by LIMIT, the
# newly arriving packets are dropped. The length of backlog
# determines queue latency in case of congestion.
#
# PEAK=<speed> optional, default not set
#
# Maximal peak rate for short-term burst traffic. This allows you
# to control the absolute peak rate the class can send at, because
# single TBF that allows 256Kbit/s would of course allow rate of
# 512Kbit for half a second or 1Mbit for a quarter of second.
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