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Bring performance and reliability to your network with the Aruba Core, Aggregation, and Access layer switches. Discuss the latest features and functionality of the ArubaOS-Switch and ArubaOS-CX devices, and find ways to improve security across your network to bring together a mobile first solution.
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Aruba 2930f dhcp-snooping

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  • 1.  Aruba 2930f dhcp-snooping

    Posted Dec 31, 2020 08:21 AM

    Hi

    I had configured dhcp-snooping on my aruba 2930f switches like this:
    dhcp-snooping
    dhcp-snooping vlan 1-1000
    inter trk1
          dhcp-snooping trust


    after run these lines the computers can't get dynamic-ip from the server.

    The 2930f version is WC.16.10.0007

    Thanks,
    Ronel 



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    Ronel Shahakui
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  • 2.  RE: Aruba 2930f dhcp-snooping

    Posted Dec 31, 2020 12:54 PM
    Have you considered to add dhcp-snooping authorized-server <ip-address-of-dhcp-server> command too? I mean you enabled DHCP Snooping on VLAN Id 1-1000 range and you trusted the trk1 interface where the DHCP Server is supposed to be reached through...this is OK but how was then configured the Switch where the DHCP server is directly connected to (if any)? is the IP Helper Address properly configured on each of your various VLANs (if/where required)?

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    Davide Poletto
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  • 3.  RE: Aruba 2930f dhcp-snooping

    Posted Dec 31, 2020 01:23 PM
    The trk1 connect to catalyst 6500 who is the layer3 of the vlans. 
    Each interface vlan have an ip helper to the DHCP.
    When I disabled the snooping, it's all working fine. 





  • 4.  RE: Aruba 2930f dhcp-snooping

    Posted Dec 31, 2020 01:41 PM
    On the Aruba 2930F can you post the output of these two commands:

    show dhcp-snooping
    show dhcp-snooping binding


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    Davide Poletto
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  • 5.  RE: Aruba 2930f dhcp-snooping
    Best Answer

    Posted Jan 03, 2021 02:37 AM
    We have able to solve the problem:

    Because on Nexus option 82 was disabled
    "Insertion of Option 82 is disabled"

    We had to disable the option on the Aruba too
    "no dhcp-snoop option 82"

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    Ronel Shahakui
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