Deployment Guide

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 conguration 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.
• Change the hello-time parameter.
PROTOCOL PVST mode
vlan hello-time
NOTE
: With large congurations (especially those congurations with more ports), Dell Networking recommends
increasing the hello-time.
The range is from 1 to 10.
The default is 2 seconds.
• Change the max-age parameter.
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Per-VLAN Spanning Tree Plus (PVST+)