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| 3.6 |  | STP Configuration |
| 3.6.2 |  | Enabling and disabling Spanning-Tree Protocol |

STP is enabled by default on VLAN 1 and on all newly created VLANs up to the spanning-tree limit as specified. Disable STP only if there are no loops in the network topology. When STP is disabled and loops are present in the topology, excessive traffic and indefinite packet duplication can drastically reduce network performance.

To re-enable STP, use the spanning-tree vlan vlan-id global configuration command.