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Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

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show spanning-tree msti

View the multiple spanning tree instance.

Syntax show spanning-tree msti [ instance-number [brief]] [guard]
Parameters
instance-number (Optional) Enter the multiple spanning tree instance number. The range is from 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.
Command Modes
  • EXEC
  • EXEC Privilege
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information Enable the multiple spanning tree protocol prior to using this command.
Example 
Dell#show spanning-tree msti 0 brief
                                             MSTI 0 VLANs mapped 1-4094
                                             Executing IEEE compatible Spanning Tree Protocol
                                             Root ID Priority 32768, Address 0001.e800.0204
                                             Root Bridge hello time 2, max age 20, forward delay 15, max hops 20
                                             Bridge ID Priority 32768, Address 0001.e800.0204
                                             We are the root of MSTI 0 (CIST)
                                             Configured hello time 2, max age 20, forward delay 15, max hops 20
                                             Bpdu filter disabled globally
                                             CIST regional root ID Priority 32768, Address 0001.e800.0204
                                             CIST external path cost 0
                                             
                                             Interface                             Designated
                                             Name     PortID  Prio Cost Sts  Cost  Bridge ID         PortID
                                             ---------- -------- ---- ------- ----------- ------- --------------------
                                             Te 0/10 128.170 128 2000   FWD  0   32768 0001.e800.0204 128.170
                                             Te 0/11 128.171 128 2000   FWD  0   32768 0001.e800.0204 128.171
                                             Te 0/12 128.172 128 2000   FWD  0   32768 0001.e800.0204 128.172
                                             
                                             Interface Bpdu
                                             Name    Role  PortID    Prio Cost Sts Cost Link-type Edge Filter
                                             Boundary
                                             ---------- ------ -------- ---- ------- ----------- ------- --------- ----
                                             Te 0/10 Desg  128.170 128 2000   FWD  0    P2P      No    No
                                             No
                                             Te 0/11 Desg  128.171 128 2000   FWD  0    P2P      No    No
                                             No
                                             Te 0/12 Desg  128.172 128 2000   FWD  0    P2P      No    No
                                             No
                                             Dell#
Example (EDS and LBK)

The bold line shows the loopback BPDU inconsistency (LBK_INC). 

Dell#show spanning-tree msti 0 brief
                                             MSTI 0 VLANs mapped 1-4094
                                             
                                             Executing IEEE compatible Spanning Tree Protocol
                                             Root ID Priority 32768, Address 0001.e801.6aa8
                                             Root Bridge hello time 2, max age 20, forward delay 15, max hops 20
                                             Bridge ID Priority 32768, Address 0001.e801.6aa8
                                             We are the root of MSTI 0 (CIST)
                                             Configured hello time 2, max age 20, forward delay 15, max hops 20
                                             CIST regional root ID Priority 32768, Address 0001.e801.6aa8
                                             CIST external path cost 0
                                             
                                             Interface                            Designated
                                             Name    PortID   Prio Cost Sts Cost Bridge ID      PortID
                                             ----------------------------------------------------------
                                             Gi 0/0  128.257  128  20000 EDS 0 32768 0001.e801.6aa8 128.257
                                             
                                             Interface
                                             Name  Role  PortID Prio Cost Sts Cost Link-type Edge Boundary
                                             ----------------------------------------------------------
                                             Gi 0/0 ErrDis 128.257  128 20000 EDS 0   P2P       No   No
                                             
                                             Dell#show spanning-tree msti 0
                                             MSTI 0 VLANs mapped 1-4094
                                             
                                             Root Identifier has priority 32768, Address 0001.e801.6aa8
                                             Root Bridge hello time 2, max age 20, forward delay 15, max hops 20
                                             Bridge Identifier has priority 32768, Address 0001.e801.6aa8
                                             Configured hello time 2, max age 20, forward delay 15, max hops 20
                                             We are the root of MSTI 0 (CIST)
                                             Current root has priority 32768, Address 0001.e801.6aa8
                                             CIST regional root ID Priority 32768, Address 0001.e801.6aa8
                                             CIST external path cost 0
                                             Number of topology changes 1, last change occured 00:00:15 ago on Gi 0/0
                                             
                                             
                                             Port 257 (GigabitEthernet 0/0) is LBK_INC Discarding
                                             Port path cost 20000, Port priority 128, Port Identifier 128.257
                                             Designated root has priority 32768, address 0001.e801.6aa8
                                             Designated bridge has priority 32768, address 0001.e801.6aa8
                                             Designated port id is 128.257, designated path cost 0
                                             Number of transitions to forwarding state 1
                                             BPDU (MRecords): sent 21, received 9
                                             The port is not in the Edge port mode
Usage Information The following describes the show spanning-tree msti 5 guard command shown in the following example.
Field Description
Interface Name MSTP interface.
Instance MSTP instance.
Sts Port state: root-inconsistent (INCON Root), forwarding (FWD), listening (LIS), blocking (BLK), or shut down (EDS Shut).
Guard Type Type of STP guard configured (Root, Loop, or BPDU guard).
Example (Guard) 
Dell#show spanning-tree msti 0 guard
                                             Executing IEEE compatible Spanning Tree Protocol
                                             Bpdu filter disabled globally
                                             
                                             Interface
                                             Name     Instance Sts Guard type Bpdu Filter
                                             --------- -------- --------- ---------- -----------
                                             Te 0/10   0        FWD     None    No
                                             Te 0/11   0        FWD     None    No
                                             Te 0/12   0        FWD     None    No

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