Specifications

Redundant Links
Rev. 9.41 Module 5 – 141
Default bridge priority
Because of the bridge priority's importance in the election of a root bridge, this
lesson focuses on configuring this option. If you do not configure a bridge priority for
a switch, it will use the default bridge priority, which is 32768. Sometimes you will
want to accept this default setting for a particular switch, but if you allow all switches
on a network to use the default bridge priority, (as this example network shows), it
will have no real effect on the election of the root bridge. Instead, the election
process will be determined by the other part of the bridge ID - the MAC address. The
switch with the lowest MAC address will be elected root bridge.
If you do not configure a bridge priority, you cannot control which switch is the root
bridge. It is possible that the oldest or least capable switch might be elected as the
root bridge, simply because it has the lowest MAC address.
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