What is spanning-tree PortFast edge trunk?
You use the portfast network on trunk ports to enable bridge assurance feature which protects against loops by detecting unidirectional links in the STP topology. But normally bridge assurance is enabled by default. A spanning tree normal port is one that functions in the default manner for spanning tree.
Do you put spanning-tree on trunk ports?
You should not disable spanning tree on trunk interfaces. In fact, STP needs to be on links between the switches, which should be the trunk interfaces. You can also leave STP enabled on the access interfaces to prevent loops if someone connects two access interfaces.
When should spanning-tree PortFast be used?
PortFast feature should be used only to connect a single workstation to a switch port to avoid layer 2 switching loop. Spanning Tree PortFast feature causes a port to enter the forwarding state immediately, bypassing the listening and learning states.
How many port states are involved in Rstp?
three port states
RSTP can be described by three port states: Discarding, Learning, and Forwarding. The Disabled, Blocking, and Listening states described by STP have been combined into the Discarding state in RSTP.
What is spanning tree Portfast Bpduguard default?
spanning-tree portfast bpduguard default (By default, BPDU guard is disabled.) Note Globally enabling BPDU guard enables it only on STP ports; the command has no effect on ports that are not running STP. Specify the interface connected to an end station, and enter interface configuration mode.
Can we use spanning PortFast on trunk ports?
It is recommended to enable PortFast only on access port types. However, PortFast can be enabled on the trunk ports by selecting the Trunk check box in the WebUI.
How many port states are involved in RSTP?
What are the spanning tree port states?
There are five Spanning Tree Port States :
- Blocking State : Switch port enters the blocking state at time of election process, when a switch receives a BPDU on a port that indicates a better path to the Root Switch or if a port is not a Root Port.
- Listening State :
- Learning State :
- Forwarding State :
- Disabled State :
What are the five STP port states?
What does spanning-tree PortFast do?
Portfast feature causes a switch port to enter the spanning tree forwarding state immediately, bypassing the listening and learning states.
What are the five STP protocol states?
What are the RSTP port states?
RSTP can be described by three port states: Discarding, Learning, and Forwarding. The Disabled, Blocking, and Listening states described by STP have been combined into the Discarding state in RSTP.
What are the states in RSTP?
Does spanning-tree portfast affect the RSTP trunk port?
The spanning-tree portfast has no effect on trunk ports. If you want to make a trunk port become Forwarding imediately after coming up, you need the spanning-tree porfast trunk command. Note that the RSTP has its own mechanism of putting a trunk port into the Forwarding state rapidly, and thus, the spanning-tree porfast trunk command is
Which port state is new for rapid spanning-tree?
Let me show you a new example with a port state that is new for rapid spanning-tree: Here is a new port for you, take a look at the fa0/17 interface of SW2. It’s called a backup port and it’s new for rapid spanning-tree.
When does a port enter the spanning tree listening state?
When the switch powers up, or when a device is connected to a port, the port enters the spanning tree listening state. When the Forward Delay timer expires, the port enters the learning state.
What is the difference between spanning-tree and Rapid-Spanning-Tree?
This is the first difference between spanning-tree and rapid spanning-tree. Rapid spanning-tree only has three port states: You already know about learning and forwarding but discarding is a new port state. Basically it combines the blocking and listening port state. Here’s a nice overview: Port active in topology? Learns MAC addresses?