Reference Guide

Multiple Spanning Tree Protocol (MSTP) | 947
show spanning-tree msti
c e s
View the Multiple Spanning Tree instance.
Syntax
show spanning-tree msti [instance-number [brief]] [guard]
Parameters
Command Modes
EXEC
EXEC Privilege
Usage
Information
You must enable Multiple Spanning Tree Protocol prior to using this command.
Command
History
Example
Figure 34-5. show spanning-tree msti [instance-number] Command Example
instance-number
[Optional] Enter the Multiple Spanning Tree Instance number
Range: 0 to 63
brief
[Optional] Enter the keyword brief to view a synopsis of the MST instance.
guard
[Optional] Enter the keyword guard to display the type of guard enabled on an
MSTP interface and the current port state.
Version 8.5.1.0 Support for the optional guard keyword was added on the E-Series ExaScale.
Version 8.4.2.1 Support for the optional guard keyword was added on the C-Series, S-Series, and
E-Series TeraScale.
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
Version 6.4.1.0 Expanded to display port error disable state (EDS) caused by loopback BPDU
inconsistency (see Figure 34-6)
FTOS#show spanning-tree msti 10
MSTI 10 VLANs mapped 101-105
Bridge Identifier has priority 32768, Address 0001.e802.3506
Configured hello time 2, max age 20, forward delay 15, max hops 5
Current root has priority 16384, Address 0001.e800.0a5c
Number of topology changes 0, last change occured 3058087
Port 82 (GigabitEthernet 2/0) is designated Forwarding
Port path cost 0, Port priority 128, Port Identifier 128.82
Designated root has priority 16384, address 0001.e800.0a:5c
Designated bridge has priority 32768, address 0001.e802.35:06
Designated port id is 128.82, designated path cost
Number of transitions to forwarding state 1
BPDU (Mrecords): sent 1109, received 0
The port is not in the portfast mode
Port 88 (GigabitEthernet 2/6) is root Forwarding
Port path cost 0, Port priority 128, Port Identifier 128.88
Designated root has priority 16384, address 0001.e800.0a:5c
Designated bridge has priority 16384, address 0001.e800.0a:5c
Designated port id is 128.88, designated path cost
Number of transitions to forwarding state 4
BPDU (Mrecords): sent 19, received 1103
The port is not in the portfast mode
Port 89 (GigabitEthernet 2/7) is alternate Discarding
Port path cost 0, Port priority 128, Port Identifier 128.89
Designated root has priority 16384, address 0001.e800.0a:5c
Designated bridge has priority 16384, address 0001.e800.0a:5c
Designated port id is 128.89, designated path cost
Number of transitions to forwarding state 3
BPDU (Mrecords): sent 7, received 1103
The port is not in the portfast mode