We perform the first set of evaluations under Bernoullian
and bursty uniform traffic, where the On and Off periods of
the bursty traffic both have geometric distributions. The
average burst length b is the average length of the On
period. The cells that arrive in the same On period (a burst)
are destined for the same output port. The destinations
among different bursts are evenly distributed among the
output ports. The results are shown in Fig. 12. The TSBCS
with pure BS (labeled as SQUISH (Clos) in the figures) performs
poorly under light and medium loads, because the
VOMQs have to wait for full batches. With the help of the
SCF scheme, the delay performance is comparable to the
ideal OQ switch. Although DCF does better than SCF, the
difference between DCF and SCF is not so obvious in the
uniform traffic scenarios. Although the single-stage
SQUISH has better performance; however, it is not possible
to build a large enough buffered crossbar to achieve large