Check that unnecessary network groups are not created. If you create a network loop to create a highly reliable network, STP normally releases the loop and communications can be performed. However, the more complex the loop becomes, the harder the investigation is in the event of a network device failure. Also, in the event of a network device failure, STP does not work and the network loop will be created and the likelihood that the network goes down increase. Take care to design the network so that a network loop is not created. Additionally, consider using switches with storm control in case of a failure.
In the following configuration, you do not need to cross connect SW1 with SW4, and SW2 with SW3. Also, if you do not use STP, you do not need to cross connect SW1 with SW2, and SW2 with SW3.
Confirmation method
Check the connection of the network configuration diagram.
