H3C Technologies H3C S12500-X Series Switches - Manual (Page 108)

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Task Command
Display the statistics of TC/TCN BPDUs sent and received
by all ports in the specified MSTI or all MSTIs (in IRF
mode).
display stp [ instance instance-list ] tc [ chassis
chassis-number slot slot-number ]
Display the spanning tree status and statistics (in
standalone mode). display stp [ instance instance-list ] [ interface
interface-list | slot slot-number ] [ brief ]
Display the spanning tree status and statistics (in IRF
mode).
display stp [ instance instance-list ] [ interface
interface-list | chassis chassis-number slot
slot-number ] [ brief ]
Display the MST region configuration information that has
taken effect.
display stp region-configuration
Display the root bridge information of all MSTIs. display stp root
Clear the spanning tree statistics. reset stp [ interface interface-list ]
Spanning tree configuration example
Network requirements
As shown in Figure 25 , all devices on the network are in the same MST region. Device A and Device B
work at the distribution layer. Device C and Device D work at the access layer.
Configure MSTP so that packets of different VLANs are forwarded along different spanning trees: Packets
of VLAN 10 are forwarded along MSTI 1, those of VLAN 30 are forwarded along MSTI 3, those of VLAN
40 are forwarded along MSTI 4, and those of VLAN 20 are forwarded along MSTI 0.
VLAN 10 and VLAN 30 are terminated on the distribution layer devices, and VLAN 40 is terminated on
the access layer devices. The root bridges of MSTI 1 and MSTI 3 are Device A and Device B, respectively,
and the root bridge of MSTI 4 is Device C.
Figure 25 Network diagram
Permit: all VLANs
Per
mit:
VL
AN
s 2
0 a
nd 3
0
Pe
rm
it:
V
LA
Ns
10
an
d 2
0
Permit: VLANs 20 and 40
Permit: VLANs 20 and
30
Permit: VLANs 10 and
20
Device A Device B
Device C Device D
XGE1/0/3
XG
E1
/0/
2
XGE1/0/3
XG
E1/0
/2
XGE1/0/3 XGE1/0/3
XG
E1/0
/2
XG
E1
/0/
2
MST region