Cisco BPDU with inconsistent peer

aacable79 · ‎03-15-2023

I have few cisco classic series switches connected with each other via trunk port config. Having port inconsistency issue at one departmental switch with Core switch. Requesting for some assistance to sort the issue

At core switch I see inconsistency errors for port connected with one particular departmental switch

Core Switch > 3850
Department problematic Switch > 3650

on Core Switch uplink going to department switch is

interface TenGigabitEthernet1/0/13
description Trunk_Going_2_Deartment_SW
switchport mode trunk

on Department switch trunk port going to core switch

interface TenGigabitEthernet1/1/3
description Trunk_UPlink_Going_to_Core_SW
switchport mode trunk

Both Switch is in rapid-pvst mode

on Core Switch , I see errors for the trunk port (connected with departmental switch)

614212: Mar 14 09:11:23: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 9 on TenGigabitEthernet1/0/13 VLAN1.
614213: Mar 14 09:11:23: %SPANTREE-2-BLOCK_PVID_PEER: Blocking TenGigabitEthernet1/0/13 on VLAN0009. Inconsistent peer vlan.
614214: Mar 14 09:11:23: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking TenGigabitEthernet1/0/13 on VLAN0001. Inconsistent local vlan.
614215: Mar 14 09:11:23: %SPANTREE-2-BLOCK_PVID_PEER: Blocking TenGigabitEthernet1/0/13 on VLAN0024. Inconsistent peer vlan.
614216: Mar 14 09:11:23: %SPANTREE-2-BLOCK_PVID_PEER: Blocking TenGigabitEthernet1/0/13 on VLAN0030. Inconsistent peer vlan.
614217: Mar 14 09:11:23: %SPANTREE-2-BLOCK_PVID_PEER: Blocking TenGigabitEthernet1/0/13 on VLAN0040. Inconsistent peer vlan.
614218: Mar 14 09:11:23: %SPANTREE-2-BLOCK_PVID_PEER: Blocking TenGigabitEthernet1/0/13 on VLAN0099. Inconsistent peer vlan.

On Core Switch - Spanning Tree

Core_SW#sh spanning-tree 

VLAN0001
  Spanning tree enabled protocol rstp
             This bridge is the root
VLAN0009
  Spanning tree enabled protocol rstp
             This bridge is the root
VLAN0024
  Spanning tree enabled protocol rstp
             This bridge is the root
VLAN0030
  Spanning tree enabled protocol rstp
             This bridge is the root
VLAN0040
  Spanning tree enabled protocol rstp
             This bridge is the root
VLAN0099
  Spanning tree enabled protocol rstp
             This bridge is the root

On Core Switch - Int Trunk

Text

On CORE Switch - INT TRUNK config


CORE_SW#sh int trunk

Port        Mode             Encapsulation  Status        Native vlan
Te1/0/1     on               802.1q         trunking      1
Te1/0/2     on               802.1q         trunking      1
Te1/0/3     on               802.1q         trunking      1
Te1/0/4     on               802.1q         trunking      1
Te1/0/6     on               802.1q         trunking      1
Te1/0/7     on               802.1q         trunking      1
Te1/0/8     on               802.1q         trunking      1
Te1/0/9     on               802.1q         trunking      1
Te1/0/11    on               802.1q         trunking      1
Te1/0/13    on               802.1q         trunking      1
Te1/0/16    on               802.1q         trunking      1
Te1/0/20    on               802.1q         trunking      1
Te1/0/21    on               802.1q         trunking      1
Te1/0/22    on               802.1q         trunking      1
Gi2/0/9     on               802.1q         trunking      1
Gi2/0/10    on               802.1q         trunking      1
Gi2/0/11    on               802.1q         trunking      1
Gi2/0/13    on               802.1q         trunking      1
Gi2/0/14    on               802.1q         trunking      1
Gi2/0/24    on               802.1q         trunking      1
Gi2/1/2     on               802.1q         trunking      1
Gi2/1/3     on               802.1q         trunking      1
Gi3/0/1     on               802.1q         trunking      1
Gi3/0/4     on               802.1q         trunking      1
Gi3/0/8     on               802.1q         trunking      1
Gi3/0/19    on               802.1q         trunking      1
Gi3/1/1     on               802.1q         trunking      1
Gi3/1/2     on               802.1q         trunking      1

Port        Vlans allowed on trunk
Te1/0/1     1-4094
Te1/0/2     1-4094
Te1/0/3     1-4094
Te1/0/4     1-4094
Te1/0/6     1-4094
Te1/0/7     1-4094
Te1/0/8     1-4094
Te1/0/9     1-4094
Te1/0/11    1-4094
Te1/0/13    1,9,24,30,40,99
Te1/0/16    1-4094
Te1/0/20    1-4094
Te1/0/21    1-4094
          
Port        Vlans allowed on trunk
Te1/0/22    1-4094
Gi2/0/9     1-4094
Gi2/0/10    1-4094
Gi2/0/11    1-4094
Gi2/0/13    1-4094
Gi2/0/14    1-4094
Gi2/0/24    1-4094
Gi2/1/2     1-4094
Gi2/1/3     1-4094
Gi3/0/1     1-4094
Gi3/0/4     1-4094
Gi3/0/8     1-4094
Gi3/0/19    1-4094
Gi3/1/1     1-4094
Gi3/1/2     1-4094

Port        Vlans allowed and active in management domain
Te1/0/1     1-2,4,8-24,26,30,40,99
Te1/0/2     1-2,4,8-24,26,30,40,99
Te1/0/3     1-2,4,8-24,26,30,40,99
Te1/0/4     1-2,4,8-24,26,30,40,99
Te1/0/6     1-2,4,8-24,26,30,40,99
Te1/0/7     1-2,4,8-24,26,30,40,99
Te1/0/8     1-2,4,8-24,26,30,40,99
Te1/0/9     1-2,4,8-24,26,30,40,99
Te1/0/11    1-2,4,8-24,26,30,40,99
Te1/0/13    1,9,24,30,40,99
Te1/0/16    1-2,4,8-24,26,30,40,99
Te1/0/20    1-2,4,8-24,26,30,40,99
Te1/0/21    1-2,4,8-24,26,30,40,99
Te1/0/22    1-2,4,8-24,26,30,40,99
Gi2/0/9     1-2,4,8-24,26,30,40,99
Gi2/0/10    1-2,4,8-24,26,30,40,99
Gi2/0/11    1-2,4,8-24,26,30,40,99
Gi2/0/13    1-2,4,8-24,26,30,40,99
Gi2/0/14    1-2,4,8-24,26,30,40,99
Gi2/0/24    1-2,4,8-24,26,30,40,99
Gi2/1/2     1-2,4,8-24,26,30,40,99
Gi2/1/3     1-2,4,8-24,26,30,40,99
Gi3/0/1     1-2,4,8-24,26,30,40,99
Gi3/0/4     1-2,4,8-24,26,30,40,99
Gi3/0/8     1-2,4,8-24,26,30,40,99
Gi3/0/19    1-2,4,8-24,26,30,40,99
Gi3/1/1     1-2,4,8-24,26,30,40,99
Gi3/1/2     1-2,4,8-24,26,30,40,99
          
Port        Vlans in spanning tree forwarding state and not pruned
Te1/0/1     1-2,4,8-24,26,30,40,99
Te1/0/2     1-2,4,8-24,26,30,40,99
Te1/0/3     1-2,4,8-24,26,30,40,99
Te1/0/4     1-2,4,8-24,26,30,40,99
Te1/0/6     1-2,4,8-24,26,30,40,99
Te1/0/7     1-2,4,8-24,26,30,40,99
Te1/0/8     1-2,4,8-24,26,30,40,99
Te1/0/9     1-2,4,8-24,26,30,40,99
Te1/0/11    1-2,4,8-24,26,30,40,99
Te1/0/13    1,9,24,30,40,99
Te1/0/16    1-2,4,8-24,26,30,40,99
Te1/0/20    1-2,4,8-24,26,30,40,99
Te1/0/21    1-2,4,8-24,26,30,40,99
Te1/0/22    1-2,4,8-24,26,30,40,99
Gi2/0/9     1-2,4,8-24,26,30,40,99
Gi2/0/10    1-2,4,8-24,26,30,40,99
Gi2/0/11    1-2,4,8-24,26,30,40,99
Gi2/0/13    1-2,4,8-24,26,30,40,99
Gi2/0/14    1-2,4,8-24,26,30,40,99
Gi2/0/24    1-2,4,8-24,26,30,40,99
Gi2/1/2     1-2,4,8-24,26,30,40,99
Gi2/1/3     1-2,4,8-24,26,30,40,99
Gi3/0/1     1-2,4,8-24,26,30,40,99
Gi3/0/4     1-2,4,8-24,26,30,40,99
Gi3/0/8     1-2,4,8-24,26,30,40,99
Gi3/0/19    1-2,4,8-24,26,30,40,99
Gi3/1/1     1-2,4,8-24,26,30,40,99
Gi3/1/2     1-2,4,8-24,26,30,40,99

On Core Switch - VLAN Config

Text

CORE_SW#sh vlan          

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Te1/0/5, Te1/0/10, Te1/0/12, Te1/0/14, Te1/0/15, Te1/0/17, Te1/0/18, Te1/0/19, Te1/0/23, Te1/0/24, Gi2/0/1
                                                Gi2/0/3, Gi2/0/4, Gi2/0/5, Gi2/0/6, Gi2/0/7, Gi2/0/8, Gi2/0/12, Gi2/0/15, Gi2/0/16, Gi2/0/17, Gi2/0/18
                                                Gi2/0/19, Gi2/0/20, Gi2/0/21, Gi2/0/22, Gi2/0/23, Gi2/1/1, Gi2/1/4, Gi3/0/2, Gi3/0/3, Gi3/0/5, Gi3/0/6
                                                Gi3/0/7, Gi3/0/9, Gi3/0/10, Gi3/0/11, Gi3/0/12, Gi3/0/13, Gi3/0/15, Gi3/0/16, Gi3/0/17, Gi3/0/18, Gi3/0/20
                                                Gi3/0/21, Gi3/0/22, Gi3/0/23, Gi3/0/24, Gi3/1/3, Gi3/1/4
9    WIFI_MGMT-VLAN                   active    Gi3/0/14
30   ABC-CORP_WIFI                    active    
40   ABC-GUEST_WIFI                   active    
99   ABC-MGMT-VLAN                    active

On Departmental Switch - VLAN config

Text

Department_SW#sh vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi1/0/1, Gi1/0/2, Gi1/0/3, Gi1/0/4, Gi1/0/5, Gi1/0/6, Gi1/0/7, Gi1/0/8, Gi1/0/10, Gi1/0/11, Gi1/0/12
                                                Gi1/0/13, Gi1/0/14, Gi1/0/15, Gi1/0/16, Gi1/0/17, Gi1/0/18, Gi1/0/19, Gi1/0/20, Gi1/0/21, Gi1/0/22, Gi1/0/23
                                                Gi1/0/24, Gi1/0/25, Gi1/0/26, Gi1/0/27, Gi1/0/28, Gi1/0/29, Gi1/0/30, Gi1/0/31, Gi1/0/32, Gi1/0/33, Gi1/0/34
                                                Gi1/0/35, Gi1/0/36, Gi1/0/37, Gi1/0/38, Gi1/0/39, Gi1/0/40, Gi1/0/42, Gi1/0/43, Gi1/0/44, Gi1/0/45, Gi1/0/47
                                                Gi1/0/48, Gi1/1/1, Gi1/1/2, Te1/1/4
9    vlan9_wifi_mgt                   active    
24   vlan24_wifi                      active    
30   ABC-CORP_WIFI                    active    
40   ABC-GUEST_WIFI                   active    
99   ABC-MGMT-VLAN                    active

On Department Switch - INT TRUNK config

Text

P1_WAREHOUSE-SW-1.3#sh int trunk

Port        Mode             Encapsulation  Status        Native vlan
Gi1/0/9     on               802.1q         trunking      1
Gi1/0/41    on               802.1q         trunking      1
Gi1/0/46    on               802.1q         trunking      1
Te1/1/3     on               802.1q         trunking      1

Port        Vlans allowed on trunk
Gi1/0/9     1-4094
Gi1/0/41    1-4094
Gi1/0/46    1-4094
Te1/1/3     1,9,24,30,40,99

Port        Vlans allowed and active in management domain
Gi1/0/9     1,9,24,30,40,99
Gi1/0/41    1,9,24,30,40,99
Gi1/0/46    1,9,24,30,40,99
Te1/1/3     1,9,24,30,40,99

Port        Vlans in spanning tree forwarding state and not pruned
Gi1/0/9     1,9,24,30,40,99
Gi1/0/41    1,9,24,30,40,99
Gi1/0/46    1,9,24,30,40,99
Te1/1/3     1,9,24,30,40,99

marce1000 · ‎03-15-2023

- FYI : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvh56485

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

balaji.bandi · ‎03-15-2023

First i would check, is the VTP running on both side as Server, if so make VTP transparent both the sides (if you do not need VTP here)

show vtp - provide you information.

can you post below information : (in text file attachement)

show span summary

show span root

show spann details

BB

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aacable79 · ‎03-15-2023

Output from Core + Department switch is attached. Kindly review if it helps.

balaji.bandi · ‎03-16-2023

CORE Switch running as VTP Server and Branch running as Transparent.

If you do not need VTP Server, Disable to Transparent.

CORE Switch has different VLAN compare to Branch. try below config and let us know is that fix the issue ?

nterface TenGigabitEthernet1/0/13
description Trunk_Going_2_Deartment_SW
witchport trunk allowed vlan 1,9,24,30,40,99
switchport mode trunk

on Department switch trunk port going to core switch

interface TenGigabitEthernet1/1/3
description Trunk_UPlink_Going_to_Core_SW
witchport trunk allowed vlan 1,9,24,30,40,99
switchport mode trunk

BB

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MHM Cisco World · ‎03-16-2023

you run in one SW RSTP and in other you run R-PVST
these are complete two different STP mode
so you must change from RSTP to R-PVST

aacable79 · ‎03-16-2023

Unfortunately this morning (before reading this thread), we tried to upgrade the switch firmware as one of other proposed solution, but during upgrade process it got hung & upon rebooting switch became unresponsive at all.

We have replaced the unit with backup switch. Now we are trying to recover the switch & if it works, we will try the VTP transparent at both ends along with suggested cmd's. Thank you very much for the information & I will update this thread soon.

balaji.bandi · ‎03-16-2023

Sure - let us know the outcome.

I may be glared looking the text file, i see both running same - where do we see different STP modes here ?

CORE_SW#show span summary
Switch is in rapid-pvst mode

DEPARTMENT_SW#show span summary
Switch is in rapid-pvst mode

BB

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MHM Cisco World · ‎03-16-2023

VLAN0001
  Spanning tree enabled protocol rstp
             This bridge is the root

I think this Q for me,
sure the summary show R-PVST but for each VLAN I see the mode is RSTP.