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cisco stp在选举根交换机后 在非根交换机上为什么将根交换机的优先级加1
SW1
VLAN0001 is executing the rstp compatible Spanning Tree protocol
  Bridge Identifier has priority 32768, sysid 1, address 5000.0001.0000
  Configured hello time 2, max age 20, forward delay 15, transmit hold-count 6
  We are the root of the spanning tree
  Topology change flag not set, detected flag not set
  Number of topology changes 18 last change occurred 00:56:55 ago
          from GigabitEthernet0/2
  Times:  hold 1, topology change 35, notification 2
          hello 2, max age 20, forward delay 15
  Timers: hello 0, topology change 0, notification 0, aging 300

SW4
VLAN0001 is executing the rstp compatible Spanning Tree protocol
  Bridge Identifier has priority 32768, sysid 1, address 5000.0004.0000
  Configured hello time 2, max age 20, forward delay 15, transmit hold-count 6
  Current root has priority 32769, address 5000.0001.0000
  Root port is 1 (GigabitEthernet0/0), cost of root path is 4
  Topology change flag not set, detected flag not set
  Number of topology changes 16 last change occurred 00:52:55 ago
          from GigabitEthernet0/0
  Times:  hold 1, topology change 35, notification 2
          hello 2, max age 20, forward delay 15
  Timers: hello 0, topology change 0, notification 0, aging 300

Current root has priority 32769此字段代表什么意思



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