Where can I use Spanning Tree PortFast?

Where can I use Spanning Tree PortFast?

You can use PortFast on switch or trunk ports that are connected to a single workstation, switch, or server to allow those devices to connect to the network immediately, instead of waiting for the port to transition from the listening and learning states to the forwarding state.

What is the function of spanning tree PortFast command?

Portfast feature causes a switch port to enter the spanning tree forwarding state immediately, bypassing the listening and learning states.

How do I use PortFast?

In switch A, run the following commands as port 20 is connected to a host.

1. Enter the configuration mode for the interface.
2. Shut down the interface.
3. Change the portfast setting.
4. Review the portfast status.
5. Reset the default spanning tree portfast value for the interface.
6. Review the portfast status.

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.

Is PortFast enabled by default?

PortFast is not enabled by default. With PortFast enabled on a port, you effectively take the port and tell spanning tree not to implement STP on that port.

How do I enable Rootguard?

Configure the Root Guard

1. Enter Configuration mode for the interface. SEFOS# configure terminal SEFOS(config)# interface extreme-ethernet 0/1.
2. Configure the port as a trunk port.
3. Enable the root guard on the port.
4. Review the root guard output on the port.
5. Disable the root guard on the interface.

What is difference between tree and spanning tree?

“Spanning” is the difference: a spanning subgraph is a subgraph which has the same vertex set as the original graph. A spanning tree is a tree (as per the definition in the question) that is spanning. For example: is not a spanning tree (it’s a tree, but it’s not spanning).

What is spanning tree protocol and how it work?

The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and ensuing broadcast radiation .

What is the role of root bridge in spanning tree?

A Root Bridge is a reference point for all switches in a spanning-tree topology. Across all connected switches a process of election occurs and the Bridge with the Lowest Bridge ID is elected as the Root Bridge.

What is designated port in spanning tree protocol?

Root Port is the port on any Non-Root Bridge which is the best port to reach the Root Switch (Root Bridge). Hence, there is no Root Port in Root Bridge. All the ports in a Root Switch (Root Bridge) are Spanning Tree Designated Ports and will be in Spanning Tree Forwarding State.