Wired

last person joined: 5 hours ago 

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.
Expand all | Collapse all

Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

  • 1.  Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

    Posted Apr 16, 2019 06:43 PM

    Hi All,

     

    A quick question:

    Could we configure an Aruba switch DHCP Server Port-Based Address Allocation?

    For instance, we have a printer connected to Port A1 with IP Address of 192.168.1.10. If the printer gets faulty and we change it, we would like the new printer to get the same IP Address on that port.

    Thanks.


    #2930M
    #2930M


  • 2.  RE: Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

    Posted Apr 17, 2019 05:37 AM

    Don't think that is possible as DHCP typically spans across multiple switches and the DHCP server doesn't see from which port the request is sent (for sure if the DHCP is running on another switch).

     

    If you need the same IP assigned each time for a specific device like a printer, most people create a reservation in the DHCP server. If you change the device and want the IP to remain the same, you will need to change the reservation.

     

    Another, not so clean, alternative is to create a dedicated subnet for such devices. This solution does not really scale.



  • 3.  RE: Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

    Posted Apr 17, 2019 07:23 AM
    If this is really a requirement you can also take a look into DHCP option 82. The switches could add additional information into the DHCP request.

    However, you need a DHCP server that support this and the Aruba switches don’t this.

    So they can add the option 82 information but can’t act on this as a DHCP server


  • 4.  RE: Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

    Posted Apr 17, 2019 06:45 PM

    Hi Willembargeman,

     



  • 5.  RE: Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

    Posted Apr 18, 2019 07:22 AM
    Looks like Windows supports this, but I think the configuration is a little bit complex.
    See also this article.

    https://www.cisco.com/c/en/us/support/docs/switches/nexus-9000-series-switches/200248-Configuring-Microsoft-Windows-Server-201.html


  • 6.  RE: Aruba 5400R/2930M Switch - DHCP Server Port-Based Address Allocation

    Posted Apr 17, 2019 06:43 PM

    Thanks guys for the response.

    Cisco has this feature available, was wondering if Aruba has it too.

     

    https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/12-2sx/dhcp-12-2sx-book/dhcp-prt-bsd-aa.html