Displaying and maintaining MSTP
To do...
Use the command...
Remarks
Display information about abnormally
blocked ports
display stp abnormal-port
[
|
{
begin
|
exclude
|
include
}
regular-expression
] Available in any view
Display BPDU statistics on ports
display stp bpdu-statistics
[
interface
interface-type interface-number
[
instance
instance-id
] ] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display information about ports blocked
by STP protection functions
display stp down-port
[
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{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the historical information of port
role calculation for the specified MSTI or
all MSTIs
display stp
[
instance
instance-id
]
history
[
slot
slot-number
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the statistics of TC/TCN BPDUs
sent and received by all ports in the
specified MSTI or all MSTIs
display stp
[
instance
instance-id
]
tc
[
slot
slot-number
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the status and statistics of MSTP
display stp
[
instance
instance-id
]
[
interface
interface-list
|
slot
slot-number
]
[
brief
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the MST region configuration
information that has taken effect
display stp region-configuration
[
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{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the root bridge information of all
MSTIs
display stp root
[
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{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Clear the statistics of MSTP
reset stp
[
interface
interface-list
]
Available in user view
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 on the
distribution layer. Device C and Device D work on 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.
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