DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Switch Management and Operating Concepts
69
Figure 5-4. After Applying the STA Rules
The switch with the lowest Bridge ID (switch C) was elected the
root bridge, and the ports were selected to give a high port cost
between switches B and C. The two (optional) Gigabit ports
(default port cost = 10) on switch A are connected to one
(optional) Gigabit port on both switch B and C. The redundant
link between switch B and C is deliberately chosen as a 100
Mbps Fast Ethernet link (default port cost = 19). Gigabit ports
could be used, but the port cost should be increased from the
default to ensure that the link between switch B and switch C
is the blocked link.
