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Can't disable vlan "default"

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TitleCan't disable vlan "default"
Symptoms
  • Can't disable vlan "default" on factory default switch
* x450G2-R1U14.5 # disable vlan Default
Error: VLAN Default cannot be disabled because it is configured for an L2 Protocol
Environment
  • Summit
  • EXOS 22.4
  • Default Vlan
Cause
  • In EXOS 22.4, when you delete vlan default from STPD s0, it doesn't remove the STP flag from the Vlan whereas, on EXOS versions below <22.4, it removes the STP tag from vlan default and hence you can disable the vlan default once it has no association with L2 protocol.
    
    On EXOS 22.4:
    
    * x450G2-R1U14.3 # configure stpd s0 delete vlan Default ports all
    * x450G2-R1U14.4 # show vlan
    Untagged ports auto-move: Inform
    -----------------------------------------------------------------------------------------------
    Name            VID  Protocol Addr       Flags                         Proto  Ports  Virtual
                                                                                  Active router
                                                                                  /Total
    -----------------------------------------------------------------------------------------------
    Default         1    --------------------------------T---------------  ANY    1 /52  VR-Default
    Mgmt            4095 10.152.0.41    /22  ----------------------------  ANY    1 /1   VR-Mgmt
    ----------------------------------------------------------------------------------------------
    
    On EXOS 21.1.3:
    
    * x450G2-R1U14.4 # configure stpd s0 delete vlan "Default" ports all
    * x450G2-R1U14.5 # show vlan
    -----------------------------------------------------------------------------------------------
    Name            VID  Protocol Addr       Flags                         Proto  Ports  Virtual
                                                                                  Active router
                                                                                  /Total
    -----------------------------------------------------------------------------------------------
    Default         1    ------------------------------------------------  ANY    1 /52  VR-Default
    Mgmt            4095 10.152.0.41    /22  ----------------------------  ANY    1 /1   VR-Mgmt
    -----------------------------------------------------------------------------------------------
 

 
Resolution
  • The workaround on EXOS 22.4 is to use the follwoing sequence of commands in order to disable vlan Default:
  • Initial state (“unconf switch all”, EXOS 22.4.1.4):
* x450G2-R1U14.23 # disable stpd s0 auto-bind vlan Default-------------------->Issue this command first
* x450G2-R1U14.24 # configure s0 delete vlan Default ports all
* x450G2-R1U14.28 # disable vlan Default
* x450G2-R1U14.29 # show vlan
Untagged ports auto-move: Inform
-----------------------------------------------------------------------------------------------
Name            VID  Protocol Addr       Flags                         Proto  Ports  Virtual
                                                                              Active router
                                                                              /Total
-----------------------------------------------------------------------------------------------
Default         1    --------------------D---------------------------  ANY    0 /52  VR-Default
Mgmt            4095 10.152.0.41    /22  ----------------------------  ANY    1 /1   VR-Mgmt
-----------------------------------------------------------------------------------------------



 
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