As discussed in the previous post, Spanning-Tree Protocol (STP) helps us to prevent from occurring switching loop. However, the spanning-tree protocol can also create a problem for your network. 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. Participating in the STP process can prevent users from accessing the server resources until the STP convergence is done. Here comes a handy feature called Spanning-Tree PortFast. Using it means the port, on which this feature is enabled, would not participate in the STP process.
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. Enabling the PortFast feature on all the switches will disable the STP process on all non-trunk ports. It will cause to take less time to change the port states of the interfaces to up on all the non-trunking ports. [Read more…]