Root Identifier has priority 32768, Address 001e.c9f1.00f3
Root Bridge hello time 2, max age 20, forward delay 15
Bridge Identifier has priority 32768, Address 001e.c9f1.00f3
Configured hello time 2, max age 20, forward delay 15
Bpdu filter disabled globally
We are the root of VLAN 2
Current root has priority 32768, Address 001e.c9f1.00f3
Number of topology changes 2, last change occured 00:14:39 ago on Po 23
Port 24 (Port-channel 23) is designated Forwarding
Port path cost 1600, Port priority 128, Port Identifier 128.24
Designated root has priority 32768, address 001e.c9f1.00:f3
Designated bridge has priority 32768, address 001e.c9f1.00:f3
Designated port id is 128.24 , designated path cost 0
Number of transitions to forwarding state 1
BPDU sent 449, received 0
The port is not in the Edge port mode, bpdu filter is disabled
Port 450 (TenGigabitEthernet 5/41) is disabled Discarding
Port path cost 2000, Port priority 128, Port Identifier 128.450
Designated root has priority 32768, address 001e.c9f1.00:f3
Designated bridge has priority 32768, address 001e.c9f1.00:f3
Designated port id is 128.450 , designated path cost 0
Number of transitions to forwarding state 0
BPDU sent 0, received 0
The port is not in the Edge port mode, bpdu filter is disabled
Port 459 (TenGigabitEthernet 5/50) is designated Forwarding
Port path cost 2000, Port priority 128, Port Identifier 128.459
Designated root has priority 32768, address 001e.c9f1.00:f3
Designated bridge has priority 32768, address 001e.c9f1.00:f3
Designated port id is 128.459 , designated path cost 0
Number of transitions to forwarding state 1
BPDU sent 457, received 0
The port is not in the Edge port mode, bpdu filter is disable
Modifying Global PVST+ Parameters
The root bridge sets the values for forward-delay and hello-time, and overwrites the values set on other
PVST+ bridges.
•Forward-delay — the amount of time an interface waits in the Listening state and the Learning state
before it transitions to the Forwarding state.
•Hello-time — the time interval in which the bridge sends bridge protocol data units (BPDUs).
•Max-age — the length of time the bridge maintains configuration information before it refreshes that
information by recomputing the PVST+ topology.
To change PVST+ parameters on the root bridge, use the following commands.
• Change the forward-delay parameter.
PROTOCOL PVST mode
vlan forward-delay
The range is from 4 to 30.
The default is 15 seconds.
Per-VLAN Spanning Tree Plus (PVST+) 711