Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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Dhcp server issues 169 range IP

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  • 1.  Dhcp server issues 169 range IP

    Posted Dec 03, 2013 01:24 AM

    We have configured two aruba controllers as master and local with more than 70 Aps. DHCP servers are configured in controllers as bellow.

     

    Master        VLAN -192.168.32.0                     Excluding  192.168.32.1 to192.168.32.128

    Local           VLAN-192.168.32.0                     Excluding  192.168.32.129 to192.168.32.253

    Lease time on both controllers                     1Day   1Hour  10min

    Aruba OS version is 5.0.4.13

     

    Sometimes users get IP s from 169.X.X.X range when disconnecting and connecting to that SSID. How i resolve/find that problem?

    IS this because the longer lease time? What is the recommended lease time for DHCP server?

     

    Nare



  • 2.  RE: Dhcp server issues 169 range IP

    Posted Dec 03, 2013 03:51 AM

    The 169.xx address range is usually self assigned by the device when it fails to receive a DHCP address. The lease time can be anything that works in your situation - for regular corporate clients could be up to a month but for busy guest networks can be as low as five minutes.



  • 3.  RE: Dhcp server issues 169 range IP

    Posted Dec 03, 2013 07:02 AM

    How i verify the reason for not issuing IP address for this device.(this is not continuous problem, but we have find the reason)



  • 4.  RE: Dhcp server issues 169 range IP

    Posted Dec 03, 2013 07:27 AM

    You can setup debugging on the controller - "logging level debugging network subcat dhcp". the after the clients have failed run -

    show log network all. Additionally the lease can be viewed on the controller using  - show ip dhcp binding.



  • 5.  RE: Dhcp server issues 169 range IP
    Best Answer

    Posted Dec 05, 2013 06:17 AM

    Thanks for your all replies. We found this is happen due to issues all ip addresses for wireless devices from DHCP server(There is no free leases). Hence we reduce our DHCP lease time. Now we are work fine.



  • 6.  RE: Dhcp server issues 169 range IP

    EMPLOYEE
    Posted Dec 03, 2013 07:30 AM
    @Nare wrote:

    How i verify the reason for not issuing IP address for this device.(this is not continuous problem, but we have find the reason)

    Nare,

     

    You could try using an external DHCP server to see if the problem goes away.  Using a split scope is tricky.  It is quite possible that you are running out of DHCP addresses, or your clients are not handling the duplicate addresses possibly.  Is that the only DHCP scope you are running on the controller(s)?