Display Stp - Huawei Quidway S3900 series Command Manual

Command Manual – MSTP
Quidway S3900 Series Ethernet Switches-Release 1510

1.1.4 display stp

Syntax
display stp [ instance instance-id ] [ interface interface-list | slot slot-number ] [ brief ]
View
Any view
Parameter
instance-id: ID of the spanning tree instance ranging from 0 to 16. A value of 0 specifies
the common and internal spanning tree (CIST).
interface-list: Ethernet port list. You can specify multiple Ethernet ports by providing this
argument in the form of interface-list = { interface-type interface-number [ to
interface-type interface-number ] } &<1-10>, where &<1-10> means that you can
provide up to 10 port indexes/port index ranges for this argument.
Slot slot-number: Specifies a slot, the STP-related information about which is to be
displayed.
brief: Displays only port state and protection measures taken on the port.
Description
Use the display stp command to display the state and statistical information about one
or all spanning trees.
The state and statistical information about MSTP can be used to analyze and maintain
the topology of a network. It also can be used to make MSTP operating properly.
If neither spanning tree instance nor port list is specified, the command displays
spanning tree information about all spanning tree instances on all ports in order of
port number.
If only a spanning tree instance is specified, the command displays information
about the specified spanning tree instance on all ports in the order of the port
number.
If only a port list is specified, the command displays information about all spanning
tree instances on these ports in the order of the port number.
If both a spanning tree instance and a port list are specified, the command
displays spanning tree information about the specified spanning tree instance and
the specified ports in order of spanning tree instance ID.
MSTP state information includes:
Global CIST parameters: Protocol operation mode, switch priority in the CIST
instance, MAC address, Hello time, Max age, Forward delay, Max hops, the
common root of the CIST, the external path cost for the switch to reach the CIST
common root, region root, the internal path cost for the switch to reach the region
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1-4
Chapter 1 MSTP Configuration Commands