Cisco Switch Uplinkfast and Backbonefast
1. Uplinkfast: apply to trunk ports, should be configured only on access-layer switches.# spanning-tree uplinkfast
2. Backbonefast:should be configured on every switch in the network.
# spanning-tree backbonefast
3. Loop guard:should be configured on two-switch-connected ports (trunk ports)
# spanning-tree loopguard default
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