Which of the following are spanning tree switch port states?
Which of the following are spanning tree switch port states?
STP Port States There are five STP switchport states; these are: Disabled – The result of an administrative command that will disable the port. Blocking – When a device is connected, the port will first enter the blocking state. Listening -The switch will listen for and send BPDUs.
What are the Spanning Tree port states?
Port States
| STP (802.1D) Port State | RSTP (802.1w) Port State | Is Port Included in Active Topology? |
|---|---|---|
| Disabled | Discarding | No |
| Blocking | Discarding | No |
| Listening | Discarding | Yes |
| Learning | Learning | Yes |
Why would spanning tree block a port?
A port is considered blocked when user data is prevented from entering or leaving that port. This does not include bridge protocol data unit (BPDU) frames that are used by STP to prevent loops. Blocking the redundant paths is critical to preventing loops on the network.
Which switch ports will be in a forwarding state?
Both switch ports on Switch A and Fa0/1 on Switch B will be in a forwarding state. Switch A will become the STP root bridge due to its lower MAC address. All ports on the root bridge will become designated ports in a forwarding state.
What are the five STP port states?
The ports on a switch with enabled Spanning Tree Protocol (STP) are in one of the following five port states.
- • Blocking.
- • Listening.
- • Learning.
- • Forwarding.
- • Disabled.
What are two Spanning Tree Protocol states?
An interface can only be in two states, Forwarding state or Blocking state. STP employs its algorithm and puts certain interfaces in a Forwarding state.
What are the different port states?
Can I use Bpdu filter on trunk ports?
A BPDU is a data message transmitted across a local area network to detect loops in network topologies. Guard feature can be enabled on any of the STP. Guard feature on a trunk port that forms the STP. STP is a network protocol that builds a logical loop-free topology for Ethernet networks.
How do I know if a port is spanning tree blocking?
Use the show spanning-tree vlan command on all switches to find out which ports are in blocking or forwarding state and confirm your expected Layer 2 path.
How do I check if a port is blocked?
Option 1: Checking Windows Firewall for blocked ports via Windows Firewall Logs
- Start >> Control Panel >> Administrative Tools >> Windows Firewall with Advanced Settings.
- From the Actions pane (right-pane) click on Properties.
- Select the appropriate firewall profile (Domain, Private or Public).
What is the typical time a switch port will go from blocking to forwarding state?
During blocking state, the port is only listening to and processing BPDUs on its interfaces. After 20 seconds, the switch port changes from the blocking state to the listening state.
What is an advantage of Pvst +?
What is one benefit of PVST+? PVST+ reduces the CPU cycles for all the switches in the network. PVST+ automatically selects the root bridge location, to provide optimiziation. PVST+ allows the root switch location to be optimized per vlan.
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.
What is Spanning Tree Protocol (STP) portfast?
What is Spanning Tree Protocol (STP) PortFast. Spanning Tree Protocol (STP) convergence (Layer 2 convergence) happens when bridges and switches have transitioned to either the forwarding or blocking state.
What is a spanning tree in a network?
The Spanning Tree Protocol (STP) is a network protocol that builds a loop-free logical topology for Ethernet networks.