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Forum Replies

  1. You have a very unique way of explaining, Clear and direct to the point. I am very grateful.
    Thank you

  2. Hi Rene

    Please can you advise what I can do, I am trying to create vlan 50 on this switch and keep getting following

    SW1(config)#vlan 50
    VTP VLAN configuration not allowed when device is not the primary server for vlan database.
    SW1#sh vtp status
    VTP Version : 3 (capable)
    VTP version running : 3
    VTP Domain Name : CCIE-domain
    VTP Pruning Mode : Disabled (Operationally Disabled)
    VTP Traps Generation : Disabled
    Device ID : aabb.cc00.0700
    Feature VLAN:
    VTP Operating Mode : Server
    Number of existing VLANs : 8
    Number of existing extended VLANs : 0
    Configuration Revision : 0
    Primary ID : 0000.0000.0000
    Primary Description :
    MD5 digest : 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
    Feature MST:
    VTP Operating Mode : Transparent
    Feature UNKNOWN:
    VTP Operating Mode : Transparent


    I tried deleting vlan.dat but to no avail






  3. You are running VTP version 3 but it seems this switch is not the primary switch so you can’t make any changes to the VLAN database. Here’s an example how to configure VTPv3:

    Or you can switch back to VTP version 2.

  4. Hi Mohamed,

    There are two trunking protocols, 802.1q and ISL. Some newer switches only support 802.1Q and in that case this command will be unavailable.

    It’s also possible that packet tracer doesn’t support it, it’s a simulator after all. It doesn’t matter too much though…when this command doesn’t work then the switch will use 802.1Q when you configure the interface as a trunk.


  5. Hi Mohamed,

    IOU will work, the L2 image supports most of the switching commands. VLANs and trunking is no problem.


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