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  • 1.  3COM 5500G-EI receive "INCOMPLIANCE-Protection port"

    Posted Apr 21, 2014 12:14 AM

    Hi, Im configuring a 3COM 5500G EI switch as a core, after I enable it stp, it keep prompting this message:

     

    %Jan 15 05:23:08:878 2005 5500G-EI MSTP/3/BPDUFRMTINCMPLNC:- 1 -Instance0's INCOMPLIANCE-Protection port GigabitEthernet1/0/26 receive incompliant message!


    port 1/0/26 is connected to HP2530G 8ports access switch which stp are also enabled.

     

    Is this cause by incompatible 802.1D standard between these 2 switches? If yes, how should I solve this issues?

     

    Regards

    Michael

     

     

    P.S. This thread has been moevd from Switching > Legacy to Comware-Based. - Hp forum moderator

     



  • 2.  RE: 3COM 5500G-EI receive "INCOMPLIANCE-Protection port"

    Posted Jun 06, 2014 08:11 AM

    Looks like incomplete versions of STP between your devices... fix that and you wont see the message any longer.



  • 3.  RE: 3COM 5500G-EI receive "INCOMPLIANCE-Protection port"

    Posted Jul 31, 2016 12:55 AM

    HI Michael_W,

    correct, this is an incompatibility between the two switch, probably the root has a different STP/MSTP (more recent).

    Set it to legacy mode, this is from manual of our HP switch: 

     
    Setting spanning tree to operate in 802. ID legacy mode

    Syntax:

    [no] spanning-tree legacy-mode

    Forces spanning tree to operate in legacy (802.1D) mode.

    Default: MSTP-operation.

    The no form of this command returns the switch to the default 802.1s native mode (MSTP-operation)

    Setting spanning tree to operate with 802. 1D legacy path cost values

    Syntax:
    spanning-tree legacy-path-cost

    Forces spanning tree to operate with legacy (802.1D) path cost values.

    Default: 802.1t.

    The no form of the command returns the switch to the default 802.1t (not legacy) path cost values.



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