Pvst Configuration Example - HP 3100 Series Configuration Manual

[DeviceC] display stp brief
MSTID
0
0
0
1
1
4
# Display brief spanning tree information on Device D.
[DeviceD] display stp brief
MSTID
0
0
0
3
3
4
Based on the output, you can draw the MSTI mapped to each VLAN, as shown in
Figure 25 MSTIs mapped to different VLANs
C
MSTI 1 mapped to VLAN 10
MSTI 3 mapped to VLAN 30

PVST configuration example

Network requirements
As shown in
•
Device A and Device B work at the distribution layer. Device C and Device D work at the access
layer.
•
Configure PVST so that packets of different VLANs are forwarded along different spanning
trees.
Port
Ethernet1/0/1
Ethernet1/0/2
Ethernet1/0/3
Ethernet1/0/1
Ethernet1/0/2
Ethernet1/0/3
Port
Ethernet1/0/1
Ethernet1/0/2
Ethernet1/0/3
Ethernet1/0/1
Ethernet1/0/2
Ethernet1/0/3
A B
A B
Root bridge Normal link
Figure 26:
Role STP State
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
ROOT FORWARDING
ALTE DISCARDING
DESI FORWARDING
Role STP State
ROOT FORWARDING
ALTE DISCARDING
ALTE DISCARDING
ROOT FORWARDING
ALTE DISCARDING
ROOT FORWARDING
A
C
MSTI 0 mapped to VLAN 20
D C
MSTI 4 mapped to VLAN 40
93
Protection
NONE
NONE
NONE
NONE
NONE
NONE
Protection
NONE
NONE
NONE
NONE
NONE
NONE
B
D
D
Blocked link
Figure 25.