Olicom CrossFire 8730, Reference Manual

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8
CrossFire 8730 Switch Reference Guide, DOC-7047 v. 1.1 Introduction
Three Switching Modes
Note that the Fast Ethernet ports always use the Store and Forward mode.
Feature Function Benefit
Cut-Through
for Token-Ring.
Switches with
minimum and
constant latency,
approximately 35 µs Lowest possible switch-latency,
which means optimal response
time for end-users.
Store and Forward
for both Token-Ring
and Fast Ethernet. Each packet is
forwarded only after
the entire packet has
been received by the
switch. This is used
for data transfer
between LAN
segments of different
speeds or for LAN
segments with a high
error rate. Does not propagate errors to
other segments.
Auto
(Adaptive
Cut-Through)
for Token-Ring.
Cut-through
switching that checks
for error packets. If a
port’s errors exceed a
user-defined threshold
then the port switches
to store and forward. Same speed as cut-through
switching, but with built-in
adaptation to errors which
means that bandwidth is
effectively preserved
Table 5. Benefits of the Switching Modes