What is the default bridge ID priority for rapid Pvst+?

32768
Ports included in the spanning tree are selected. For each VLAN, the switch with the highest bridge ID (that is, the lowest numerical ID value) is elected as the root bridge. If all switches are configured with the default priority (32768), the switch with the lowest MAC address in the VLAN becomes the root bridge.

What is port priority in spanning tree?

When a loop occurs in a network topology, spanning tree can use the port priority value for the ports to decide which port must be put in forwarding state. The port priority is only used to determine the topology if the loop in the network cannot be resolved using bridge IDs or path cost.

How do I set priority on a Cisco switch?

From the global configuration mode, issue the command switch stack-member-number priority new-priority-value.
From the Bootloader switch: prompt, issue the command set SWITCH_PRIORITY new-priority-value.

What is the default value for spanning tree port priority?

The default priority is 32768, and additional roots are set below this number. STP increments priority by 4096, so the next priority is 4096 below 32768. The lower the number, the higher the priority.

What is the main benefit of using rapid Pvst+?

Rapid PVST+ (IEEE 802.1w) is an enhanced version of PVST+ and allows for faster spanning-tree calculations and convergence in response to Layer 2 topology changes. Rapid PVST+ defines three port states: discarding, learning, and forwarding, and provides multiple enhancements to optimize network performance.

What is the difference between PVST+ and rapid PVST+?

PVST is usually used on VLANS (or Virtual Local Area Network) while RSTP is often used in LAN. RSTP operates much like STP with Cisco’s enhancements while PVST is a Cisco proprietary in itself. PVST deals with VLANs which means it handles more network devices compared to the RSTP.

What is port priority?

The priority of a port is a factor that determines whether the port can be elected as the root port of a device. If all other conditions are the same, the port with the highest priority is elected as the root port. You can set port priority values based on the actual networking requirements.

How do I set vlan priority?

To assign a priority to a VLAN-ID:

Select Quality of Service from the Configuration tab, and then select VLAN Priority from the left pane.
From the list, select the VLAN to which you want to assign a priority.
Click the DSCP Policy drop-down arrow and select the DSCP policy you want to use for the VLAN.

What is vlan priority?

The QoS VLAN Priority lets you assign a priority to outbound packets containing the specified VLAN-ID (VID). If the packet leaves the switch in a tagged VLAN, it carries the 802.1p priority with it to the next downstream device. …

Why would you use rapid Pvst+ instead of Pvst+?

“RSTP” stands for “Rapid Spanning Tree Protocol” while “PVST” does the same for “Per-VLAN Spanning Tree.” RSTP is an improvement of STP (Spanning Tree Protocol) in terms of being newer and faster. The RSTP is able to respond to changes in six seconds. Also, it has all the features of previous Cisco proprietary methods.

What is rapid Pvst mode?

Rapid per VLAN Spanning Tree (Rapid PVST+) is an updated implementation of STP that allows you to create one spanning tree topology for each VLAN. Rapid PVST+ is the default STP mode on the switch.

What is an advantage of Pvst +?

PVST+ is an enhancement for Common STP which separates 802.1d spanning-tree instance for each VLAN. This protocol is more efficient on the links, however it causes higher CPU and memory usage.

What is the inconsistent port type in PVST +?

Inconsistent port type.PVST+: restarted the forward delay timer for FastEthernet1/3 Now the access port receives untagged SSTP BPDUs from SW1 with VLAN ID TLV equal to 1. Since this does not match the locally configured VLAN, the port is declared «type-inconsistent» – the other side is trunk and the local side is an access port.

What is the priority range for RPVST + on VLAN?

The ability to change the Priority provides flexibility for determining which switch on the VLAN will be the root for RPVST+, regardless of its MAC address. The priority range for an RPVST+ switch is 0-61440. However, this command specifies the priority as a multiplier (0 – 15) of 4096.

What is the priority multiplier for RPVST +?

The priority range for an RPVST+ switch is 0-61440. However, this command specifies the priority as a multiplier (0 – 15) of 4096. That is, when you specify a priority multiplier value of 0 – 15, the actual priority assigned to the switch is: (priority-multiplier) x 4096.

How is root guard enabled in RPVST +?

spanning tree root-guard This feature is available in RPVST+ only. When a port is enabled as root-guard, it cannot be selected as the root port even if it receives superior STP BPDUs. The port is assigned an “alternate” port role and enters a blocking state if it receives superior STP BPDUs.

What is the default bridge ID priority for rapid Pvst+? 32768 Ports included in the spanning tree are selected. For each VLAN, the switch with the highest bridge ID (that is, the lowest numerical ID value) is elected as the root bridge. If all switches are configured with the default priority (32768), the switch with…