3Com PS Hub 40, User Manual

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DUA1640-5AAA02
4-2
C
HAPTER
4: L
OAD
B
ALANCING
How Does Load
Balancing Work?
The load balancing feature monitors the traffic levels in the stack. At
regular intervals or when it reaches a predefined traffic level (whichever
you have configured), the stack starts load balancing. Here are the
steps it performs:
1 The PS Hubs work out which internal segments and cascaded segments
are connected by a switch (either through the PS Hub 50 unit’s
segment switch or an external switch). It does this because the load
balancing feature will only move ports between segments that they
currently communicate with (so that no workstations become isolated).
Figure 4-1 shows an example of a stack (with a PS Hub 50) that is to
be load balanced. The segments that can be load balanced have been
indicated.
Figure 4-1
Example of Load Balancing