Rapid Spanning Tree Protocol (RSTP) - How do trunk ports behave in RSTP ? Trunk is a function that groups ports and combines the links among those ports into a single link. ... In order to prevent loop, Port 26 and 27 of SW1 and Port 26 and 28 of SW4 should be trunked as a group.

Does STP work on trunk ports?

STP enabled ports that are connected to devices such as a single switch, workstation, or a server can access the network only after passing all these STP states. ... When PortFast feature is enabled on a switch or a trunk port, the port immediately transitions to the STP forwarding state.

Should spanning-tree be enabled on all ports?

You configure the command “spanning-tree portfast” on all the ports connecting to end devices like workstations. They then automatically bypass the wait period and DHCP works properly. It's important to only configure this command on ports that connect to end devices though.