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IAP 135/RAP 109 - DHCP reservation on Cisco 3750

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  • 1.  IAP 135/RAP 109 - DHCP reservation on Cisco 3750

    Posted May 25, 2017 09:17 PM

    I'm having a problem setting my APs to get specific address from the DHCP server on my Cisco 3750.

    For the overall scope I have the following which is working just fine.  Regular clients pull ip from pool of non-excluded addresses when plugged into any port configured for this vlan.  I also have 2 other scope setup for 2 other vlans and those are working fine as well.

    DHCP config for VLAN1 :
    ip dhcp excluded-address 10.0.0.1 10.0.0.100
    ip dhcp pool DHCP_VLAN_1
    network 10.0.0.0 255.255.255.0
    domain-name MGMT.local
    lease 0 8 0
    interface vlan 1
    ip address 10.0.0.251 255.255.255.0


    Below is the switch config I have to so that I can get the AP to pull the address 10.0.0.41 which is also in the excluded range above.  Every time the AP is powered up it pulls it gets an address in the x.x.x.100 to x.x.x.255 range default pool above.  

    ip dhcp pool DHCP_Aruba1
    host 10.0.0.41 255.255.255.0
    hardware-address 01e0.b519.bd88.36
    domain-name MGMT.local

    I also tried changing the reserved address from x.x.x.41. to x.x.x.141 so that it's not in the excluded range in the main pool avove and the AP still doesn't pull the intended IP.

    ip dhcp pool DHCP_Aruba1
    host 10.0.0.141 255.255.255.0
    hardware-address 01e0.b519.bd88.36
    domain-name MGMT.local
    exit


    I know I can just set a static IP within the AP itself but I'm trying to avoid doing that.  Ultimately I'm going to have 3-4 APs and I want to know that each AP has the intended IP handed out from the Cisco 3750. 

     

    Can anyone advise what I'm missing.  

    The APs are pulling IP's otherswise just not the intended IP.  The hardware address is confirmed as valid by looking on the switch "show ip DHCP binding". 

     

    Do I need to setup Option 60 and/or Option 43 or is there something else I'm missing.

    Thanks in Advance.



  • 2.  RE: IAP 135/RAP 109 - DHCP reservation on Cisco 3750

    Posted Jun 04, 2017 09:10 PM

    To follow up, I have resolved my problem and have the Cisco 3750 handing out the expected addresses to the APs via reservations.  The APs need to be treated just like a windows machine in the DHCP config.