![]() First, you need to select an interface for which you want to enable or configure PortFast, and then execute the spanning-tree portfast command to enable this feature.Īs shown in the preceding figure, the PortFast feature will only have effect when the interface is in a non-trunking mode. The following figure shows the commands used to enable the PortFast feature. It will cause to take less time to change the port states of the interfaces to up on all the non-trunking ports. Enabling the PortFast feature on all the switches will disable the STP process on all non-trunk ports. The ports enabled with the PortFast feature would not spend the usual 50 seconds to come up into the forwarding mode while STP is converging. Using it means the port, on which this feature is enabled, would not participate in the STP process. Here comes a handy feature called Spanning-Tree PortFast. Participating in the STP process can prevent users from accessing the server resources until the STP convergence is done. For example, suppose you have a server that is connected to your switch and you are sure that there are no chances to occur a switching loop, even if the STP is disabled. However, the spanning-tree protocol can also create a problem for your network. As discussed in the previous post, Spanning-Tree Protocol (STP) helps us to prevent from occurring switching loop. ![]()
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