ExtremeSwitching (EXOS)

Expand all | Collapse all

DHCP Snooping - what is the use-case for uploading dhcp-bindungs to server

  • 1.  DHCP Snooping - what is the use-case for uploading dhcp-bindungs to server

    Posted 01-24-2019 06:58
    EXOS offer this commands:

    code:
    configure ip-security dhcp-bindings storage filename
    configure ip-security dhcp-bindings storage location


    Manual explains that switch can automatic / periodic upload DHCP Binding Adresses to a tftp server.

    Unfortunately Manual does NOT give a Usecase of this commands !!!
    It does NOT explain what can i do with them on the server ?!

    I am searching for a command that trigger a download ... manual does NOT tell anything that maybe the upload does also the download new entries.

    Looking at Cisco ... it does the same ... BUT also allow a download by:

    code:
    renew ip dhcp snooping database [validation none] [url]



    Can someone clarify that ?
    What is the use-case to upload switch DHCP-binding table to server ?


  • 2.  RE: DHCP Snooping - what is the use-case for uploading dhcp-bindungs to server

    Posted 01-24-2019 07:20
    Hello,

    from memory the file is stored in such a way that it can be run as script on the switch to import these bindings. The use-case is when the switch reboots and looses all its current bindings, you can import them again to have the same mac-to-IP bindings.


  • 3.  RE: DHCP Snooping - what is the use-case for uploading dhcp-bindungs to server

    Posted 01-24-2019 14:19


    OK - it seems like the same functionality Cisco provide.
    BUT Cisco Provide the "renew ip dhcp snooping database" command to load this data.

    Which command provide EXOS ?
    Do i have write my own script for importing the data? (Write my own script to close the gap ?)

    BR


  • 4.  RE: DHCP Snooping - what is the use-case for uploading dhcp-bindungs to server

    Posted 01-24-2019 14:48
    I think the renew option is part of the enable ip-security dhcp-binding restoration.

    From the command reference.

    enable ip-security dhcp-bindings restoration
    Description
    Enables download and upload of DHCP bindings.
    Syntax Description
    This command has no arguments or variables.
    Default
    Disabled.
    Usage Guidelines
    The command allows you to enable the download and upload of the DHCP bindings, essentially
    enabling the DHCP binding functionality. The default is disabled.