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Refer to the exhibit. You issued the "show spanning-tree vlan 10" command at the switch. Why does the Bridge ID Priority show as 32778?
the VLAN ID is added to the default priority value
it is the default priority value
the Bridge Priority a randomly generated value ranging from 0 to 8192 in increments of 4096
it was manually configured
The default priority for switches (in terms of STP root bridge election) is 32768. The priority can be set manually, but values should be in 4096 increments. If you set the priority of two switches, one with 0 and the other is 4096, the switch with a priority of 0 will be chosen as the root bridge. In the scenario, the value of the Bridge ID is 32778. This is because of the VLAN ID added to the default priority (10 + 32768 = 32778). You can verify this by looking at the value of "sys-id-ext" (System ID Extention). (http://www.firewall.cx/networking-topics/protocols/spanning-tree-protocol/1054-spanning-tree-protocol-root-bridge-election.html)
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