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Why are there multiple Default-VLAN IP-Entries (254.128.0.0) in a Backplane-Stack?

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  • 1.  Why are there multiple Default-VLAN IP-Entries (254.128.0.0) in a Backplane-Stack?

    Posted Oct 15, 2019 02:50 AM
      |   view attached

    I have two new 2930M Switches which I stacked together using Backplane-Stacking. Both Switches also have an additonal 10GbE SFTP+ Portmodul. 

     

    No further configuration done, just formed the stack. In the Menu interface of the Stack are already multiple default VLAN IP-Entries, 4 times DHCP/Bootp 254.128.0.0 0.0.0.0. (see the image attached)

     

    Here are my questions:

    1. Shouldn't there be only one Default VLAN IP entry?

    2. Why 254.128.0.0 by default?

    3. Why 4 entries, where do they come from?

     

    Thank you!


    #2930M
    #2930M


  • 2.  RE: Why are there multiple Default-VLAN IP-Entries (254.128.0.0) in a Backplane-Stack?

    Posted Oct 15, 2019 04:52 AM

    can you share this output as well (from the cli,not the menu)

    show ip

    show arp



  • 3.  RE: Why are there multiple Default-VLAN IP-Entries (254.128.0.0) in a Backplane-Stack?

    Posted Oct 15, 2019 06:26 AM

    Unfortunately not, I saw this while being onsite at the customer. I'm currently not there.

     

    I just went ahead by disabling 3 of them and editing the first entry, 

    but I'm still wondering what it means.



  • 4.  RE: Why are there multiple Default-VLAN IP-Entries (254.128.0.0) in a Backplane-Stack?

    Posted Oct 23, 2019 07:01 AM

    Has no one an idea why?