Switch 7700 Command reference Guide, v2.0

MSTP Configuration Commands 317
display stp Syntax
display stp [ instance instance-id ] [ interface interface-list ] [
brief ]
View
All views
Parameter
instance-id: Specifies the spanning tree instance ID, ranging from 0 to 48.
interface-list: Ethernet port list, containing multiple Ethernet ports and
expressed as
interface _list = { { interface_type interface_num |
interface_name } [ to { interface_type interface_num | interface_name } ]
}&<1-10>. For detail descriptions of
interface_type, interface_num and
interface_name parameters, refer to the corresponding descriptions in Port
Command Manual. &<1-10> means that the preceding parameters can be
entered up to 10 times.
brief: Configure to display the state and protection type of the port only, instead
of any other information.
Description
Use the display stp command to view the state information and statistics
information of the spanning tree.
The MSTP state and statistics information can help analyze and maintain the
network topology and maintain the normal operation of MSTP.
If no STI ID or port list is specified, the command will display the spanning tree
information of all the instances on all the ports in port number order. If the
instance ID is specified, the command will display the spanning tree information of
the specified instance on all the port in port number order. If only the port list is
specified, the command will display the information about all the STIs on the port
in port number order. If both the STI ID and port list are specified, the command
will displays the spanning tree information of the specified instance on the
specified port in instance ID order.
MSTP state information include:
1 Global CIST parameter: Protocol operation mode, switch priority in the CIST
instance, MAC address, Hello Time, Max Age, Forward Delay, Max Hops, CIST
common root, external path cost of the switch to the CIST common root, region
root, internal path cost of the switch to the CIST common root, CIST root port of
the switch, and whether to enable BPDU protection.
2 CIST port parameter: Port state, role, priority, path cost, designated bridge,
designated port, edge port/non-edge port, whether connected to the
point-to-point link, port transit limit, whether to enable Root protection, whether
being a region edge port, Hello Time, Max Age, Forward Delay, Message-age time,
and Remaining-hops.
3 Global MSTIs parameter: MSTI instance ID, bridge priority of the instance, region
root, internal path cost, MSTI root port, and MASTER bridge.