Developers Guide

Table Of Contents
Figure 107. PVST+ with Extend System ID
Augment the bridge ID with the VLAN ID.
PROTOCOL PVST mode
extend system-id
DellEMC(conf-pvst)#do show spanning-tree pvst vlan 5 brief
VLAN 5
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 32773, Address 0001.e832.73f7
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 32773 (priority 32768 sys-id-ext 5), Address 0001.e832.73f7
We are the root of Vlan 5
Configured hello time 2, max age 20, forward delay 15
PVST+ Sample Configurations
The following examples provide the running configurations for the topology shown in the previous illustration.
Example of PVST+ Configuration (R1)
interface TenGigabitEthernet 1/22/1
no ip address
switchport
no shutdown
!
interface TenGigabitEthernet 1/32/1
no ip address
switchport
no shutdown
!
protocol spanning-tree pvst
no disable
vlan 100 bridge-priority 4096
interface Vlan 100
no ip address
tagged TenGigabitEthernet 1/22,32/1
no shutdown
!
interface Vlan 200
no ip address
tagged TenGigabitEthernet 1/22,32/1
Per-VLAN Spanning Tree Plus (PVST+)
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