Wired Intelligent Edge

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  • 1.  dhcp-snooping on Aruba 6100 switch

    Posted Jan 09, 2025 03:43 PM

    Having in the past worked with dhcp snooping on Cisco switches, I am trying to implement it on our 6100 edge switches running ArubaOS-CX PL.10.14.1020.  The relevant part of the configuration is:

        .

        .

        .

    dhcpv4-snooping

        .               (Note:  I typed in dhcp-snooping but the switch changed it to dhcpv4-snooping)

        .

        .

    interface 1/1/23

        no shutdown

        vlan trunk native 15

        vlan trunk allowed all

    interface 1/1/24

        no shutdown

        vlan trunk native 15

        vlan trunk allowed all

        dhcpv4-snooping trust

        .

        .

        .

    I am thinking this should allow correct dhcp operation if port 24 is used as the uplink to the network containing the dhcp server, but not allow it with port 23 is used.  However, dhcp works just fine whichever port I use (in other words, dhcp snooping does not seem to be working at all).  I'm obviously leaving out some vital configuration step -- can someone point out what's missing?

    Thanks,

    hdw



  • 2.  RE: dhcp-snooping on Aruba 6100 switch

    Posted Jan 09, 2025 04:40 PM

    You need to enable dhcpv4-snooping for the vlan

     

    6100(config)# vlan 15

    6100(config-vlan-15)# dhcpv4-snooping

      <cr>

     

    Regards

    Anil






  • 3.  RE: dhcp-snooping on Aruba 6100 switch

    Posted Jan 10, 2025 01:00 PM

    THanks much for the info!

    hdw




  • 4.  RE: dhcp-snooping on Aruba 6100 switch

    Posted Jan 10, 2025 01:01 PM

    Altogether a typical configuration and show commands look like this.

    DHCP Snooping Configuraton and Show Commands for IPv4



  • 5.  RE: dhcp-snooping on Aruba 6100 switch

    Posted Jan 10, 2025 01:40 PM

    Thanks for the added info

    hdw