H3C Technologies H3C S12500 Series Switches - Manual (Page 114)

101
3 GigabitEthernet3/0/2 ALTE DISCARDING NONE
4 GigabitEthernet3/0/3 ROOT FORWARDING NONE
Based on the output, you can draw the MSTI mapped to each VLAN, as shown in Figure 30 .
Figure 30 MSTIs mapped to different VLANs
PVST configuration example
Network requirements
As shown in Figure 31 , 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.
VLAN 10, VLAN 20, and VLAN 30 are terminated on the distribution layer devices, and VLAN 40 is
terminated on the access layer devices. The root bridge of VLAN 10 and VLAN 20 is Device A, that of
VLAN 30 is Device B, and that of VLAN 40 is Device C.