Table of Contents
4.2 Commands for Monitor and Debug
4.2.1 debug spanning-tree
Command: debug spanning-tree
no debug spanning-tree
Function: Enable MSTP debugging. The no command disables MSTP debugging.
Parameters: None.
Command mode: Admin Mode
Default: None.
Usage guide: This command is the general command for all MSTP debugging. Users should enable detailed debugging, and then use this command to display the relevant debugging information. In general, this command is used by skilled technicians.
Example: Enable to receive the debugging information of BPDU messages on port1/0/1.
no debug spanning-tree
Function: Enable MSTP debugging. The no command disables MSTP debugging.
Parameters: None.
Command mode: Admin Mode
Default: None.
Usage guide: This command is the general command for all MSTP debugging. Users should enable detailed debugging, and then use this command to display the relevant debugging information. In general, this command is used by skilled technicians.
Example: Enable to receive the debugging information of BPDU messages on port1/0/1.
active500EM#debug spanning-tree active500EM#debug spanning-tree bpdu rx interface ethernet 1/0/1
4.2.2 show mst-pending
Command: show mst-pending
Function: Display the configuration of the current MSTP region.
Parameters: None.
Command mode: Admin Mode
Default: None.
Usage guide: This command will display the configuration of the current MSTP region, including MSTP name, revision, as well as VLAN and instance mapping. Note: Before quitting the MSTP Region Mode, the displayed parameters may not be effective.
Example: Display the configuration of the current MSTP region.
Function: Display the configuration of the current MSTP region.
Parameters: None.
Command mode: Admin Mode
Default: None.
Usage guide: This command will display the configuration of the current MSTP region, including MSTP name, revision, as well as VLAN and instance mapping. Note: Before quitting the MSTP Region Mode, the displayed parameters may not be effective.
Example: Display the configuration of the current MSTP region.
active500EM(config)#spanning-tree mst configuration active500EM(config-mstp-region)#show mst-pending Name activeARC Revision 0 Instance Vlans Mapped ---------------------------------- 00 1-29, 31-39, 41-4093 03 30 04 40 05 4094 ----------------------------------
4.2.3 show spanning-tree
Command: show spanning-tree [mst [<instance-id>]] [interface <interface-list>] [detail]
Function: Display the MSTP Information.
Parameters:
Parameters:
-
<instance-id>: sets the instance ID. The valid range is from 0 to 64.
-
<interface-list>: sets the interface list.
-
detail: sets the detailed spanning-tree information.
Command mode: Admin and Configuration Mode
Default: None
Usage guide: This command can display the MSTP information of the instances in the current bridge.
Example Display the MSTP bridge.
active500EM#active500EM#show spanning-tree -- MSTP Bridge Config Info -- Standard : IEEE 802.1s Bridge MAC : 00: 03: 0f: 01: 0e: 30 Bridge Times : Max Age 20, Hello Time 2, Forward Delay 15 Force Version: 3 ########################### Instance 0 ########################### Self Bridge Id : 32768 - 00: 03: 0f: 01: 0e: 30 Root Id : 16384.00: 03: 0f: 01: 0f: 52 Ext.RootPathCost : 200000 Region Root Id : this switch Int.RootPathCost : 0 Root Port ID : 128.1 Current port list in Instance 0: Ethernet1/0/1 Ethernet1/0/2 (Total 2) PortName ID ExtRPC IntRPC State Role DsgBridge DsgPort -------------- ------- --------- --------- --- ---- ------------------ ------- Ethernet1/0/1 128.001 0 0 FWD ROOT 16384.00030f010f52 128.007 Ethernet1/0/2 128.002 0 0 BLK ALTR 16384.00030f010f52 128.011 ########################### Instance 3 ########################### Self Bridge Id : 0.00: 03: 0f: 01: 0e: 30 Region Root Id : this switch Int.RootPathCost : 0 Root Port ID : 0 Current port list in Instance 3: Ethernet1/0/1 Ethernet1/0/2 (Total 2) PortName ID IntRPC State Role DsgBridge DsgPort -------------- ------- --------- --- ---- ------------------ ------- Ethernet1/0/1 128.001 0 FWD MSTR 0.00030f010e30 128.001 Ethernet1/0/2 128.002 0 BLK ALTR 0.00030f010e30 128.002 ########################### Instance 4 ########################### Self Bridge Id : 32768.00: 03: 0f: 01: 0e: 30 Region Root Id : this switch Int.RootPathCost : 0 Root Port ID : 0 Current port list in Instance 4: Ethernet1/0/1 Ethernet1/0/2 (Total 2) PortName ID IntRPC State Role DsgBridge DsgPort -------------- ------- --------- --- ---- ------------------ ------- Ethernet1/0/1 128.001 0 FWD MSTR 32768.00030f010e30 128.001 Ethernet1/0/2 128.002 0 BLK ALTR 32768.00030f010e30 128.002
Displayed Information | Description |
Bridge Information | |
Standard | STP version |
Bridge MAC | Bridge MAC address |
Bridge Times | Max Age, Hello Time and Forward Delay of the bridge |
Force Version | Version of STP |
Instance Information | |
Self Bridge Id | The priority and the MAC address of the current bridge for the current instance |
Root Id | The priority and the MAC address of the root bridge for the current instance |
Ext.RootPathCost | Total cost from the current bridge to the root of the entire network |
Int.RootPathCost | Cost from the current bridge to the region root of the current instance |
Root Port ID | Root port of the current instance on the current bridge |
MSTP Port List Of The Current Instance | |
PortName | Port name |
ID | Port priority and port index |
ExtRPC | Port cost to the root of the entire network |
IntRPC | Cost from the current port to the region root of the current instance |
State | Port status of the current instance |
Role | Port role of the current instance |
DsgBridge | Upward designated bridge of the current port in the current instance |
DsgPort | Upward designated port of the current port in the current instance |
4.2.4 show spanning-tree mst config
Command: show spanning-tree mst config
Function: Display the MSTP configuration.
Parameters: None.
Command mode: Admin Mode
Default: None.
Usage guide: This command shows the parameters of the MSTP configuration, including MSTP name, revision, as well as VLAN and instance mapping.
Example: Display the configuration of the MSTP on the switch.
Function: Display the MSTP configuration.
Parameters: None.
Command mode: Admin Mode
Default: None.
Usage guide: This command shows the parameters of the MSTP configuration, including MSTP name, revision, as well as VLAN and instance mapping.
Example: Display the configuration of the MSTP on the switch.
active500EM#active500EM#show spanning-tree mst config Name att Revision 0 Instance Vlans Mapped ---------------------------------- 00 1-29, 31-39, 41-4094 03 30 04 40 ----------------------------------
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