Displaying And Maintaining The Spanning Tree; Spanning Tree Configuration Examples; Mstp Configuration Example - HP 5120 EI Series Lan Switching Configuration Manual

Displaying and maintaining the spanning tree

Task
Display information about ports blocked
by spanning tree protection functions.
Display BPDU statistics on ports.
Display information about ports shut
down by spanning tree protection
functions.
Display the historical information of port
role calculation for the specified MSTI or
all MSTIs.
Display the statistics of TC/TCN BPDUs
sent and received by all ports in the
specified MSTI or all MSTIs.
Display the spanning tree status and
statistics.
Display the MST region configuration
information that has taken effect.
Display the root bridge information of all
MSTIs.
Clear the spanning tree statistics.

Spanning tree configuration examples

MSTP configuration example

Network requirements
As shown in
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 28:
Command
display stp abnormal-port [ | { begin |
exclude | include } regular-expression ]
display stp bpdu-statistics [ interface
interface-type interface-number [ instance
instance-id ] ] [ | { begin | exclude |
include } regular-expression ]
display stp down-port [ | { begin |
exclude | include } regular-expression ]
display stp [ instance instance-id | vlan
vlan-id ] history [ slot slot-number ] [ |
{ begin | exclude | include }
regular-expression ]
display stp [ instance instance-id | vlan
vlan-id ] tc [ slot slot-number ] [ | { begin |
exclude | include } regular-expression ]
display stp [ instance instance-id | vlan
vlan-id ] [ interface interface-list | slot
slot-number ] [ brief ] [ | { begin | exclude
| include } regular-expression ]
display stp region-configuration [ |
{ begin | exclude | include }
regular-expression ]
display stp root [ | { begin | exclude |
include } regular-expression ]
reset stp [ interface interface-list ]
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Remarks
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