From: spduo (frenzeus@streamyx.com)
Date: Wed Jul 04 2007 - 03:39:03 ART
Hi Alexei,
I could get it working with manual binding, i.e via "host" command under ip
dhcp-pool config mode. But i would have to tie that to a client-id which
needs to match on the client's mac-add. No issues here, but was concerned if
there would be a change of mac-address on the client end interface if it
reloads (client being a cisco router).
Thanks.
Cheers,
K
----- Original Message -----
From: "Alexei Monastyrnyi" <alexeim@orcsoftware.com>
To: "spduo" <frenzeus@streamyx.com>
Cc: "Avner Izhar" <aizhar@ccbootcamp.com>; "Cisco certification"
<ccielab@groupstudy.com>
Sent: Monday, July 02, 2007 7:04 PM
Subject: Re: DHCP server Assigning Specific IP to client
> Hi.
>
> In your case I would see a call for DHCP manual binding (or probably
> static mapping, if it is a real-life scenario).
>
> HTH,
> A.
>
> on 7/2/2007 8:59 AM spduo wrote:
>> Hi,
>>
>> Tahnks for the reply. In my case, there's no other client.. it is
>> between R3 (dhcp server) and SW1 (dhcp client). I've attempted to clear
>> the binding numerous times, R3 just does not assign 10.1.37.7 to SW1.
>>
>> Cheers.
>>
>>
>> ----- Original Message ----- From: "Avner Izhar" <aizhar@ccbootcamp.com>
>> To: "spduo" <frenzeus@streamyx.com>; "Cisco certification"
>> <ccielab@groupstudy.com>
>> Sent: Monday, July 02, 2007 7:42 AM
>> Subject: RE: DHCP server Assigning Specific IP to client
>>
>>
>>> Hi,
>>>
>>> Looks like there is some other client in the network who request the
>>> ip faster
>>> then the one you are configuring.
>>>
>>> You can try to find it by the mac address the will be displayed with
>>> 'show ip
>>> dhcp binding', or you can configure static binding by following the
>>> instruction in here:
>>> http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide
>>>
>>> 09186a008027fa7c.html
>>>
>>> Please note that the mac address listed in the 'show ip dhcp binding'
>>> will
>>> start with two digit hardware type and then the actual mac address.
>>>
>>> -------------------------------------------
>>> Regards,
>>> Avner Izhar
>>> Technical Instructor
>>> CCIE #15999 (Voice)
>>> Voice: (702) 968-5100
>>> Fax: (702) 446-8012
>>> E-mail: aizhar@ccbootcamp.com
>>> Network Learning Inc - A Cisco Sponsored Organization(SO) YES! We take
>>> Cisco
>>> Learning credits!
>>> Toll Free: 877-NLI-CCIE (877-654-2243)
>>> Outside USA: 702-968-5100
>>> FAX: 702-446-8012
>>>
>>>
>>> ________________________________
>>>
>>> From: nobody@groupstudy.com on behalf of spduo
>>> Sent: Mon 7/2/2007 9:48 PM
>>> To: Cisco certification
>>> Subject: DHCP server Assigning Specific IP to client
>>>
>>>
>>>
>>> Hi all,
>>>
>>> An interface has been configured on a dhcp-client router to request
>>> for IP
>>> address via DHCP (ip address dhcp) under interface configuration mode.
>>> A DHCP
>>> server has been configured with a pool to purposefully assign a
>>> specific IP
>>> address to the client, i.e. 10.1.37.7. The following is what i've
>>> configured
>>> on the server-end in the dhcp-pool:
>>>
>>> ip dhcp excluded-address 10.1.37.1 10.1.37.6
>>> ip dhcp excluded-address 10.1.37.8 10.1.37.254
>>> !
>>> ip dhcp pool DHCP_POOL
>>> network 10.1.37.0 255.255.255.0
>>> lease infinite
>>> !
>>> And i keep getting the following message prompt on the server-end. It
>>> seems
>>> the DISCOVER packet is received from the client, but server fails to
>>> allocate..
>>>
>>> DHCPD: DHCPDISCOVER received from client
>>> 0063.6973.636f.2d63.6330.362e.3038.6638.2e66.3130.302d.4469.31 on
>>> interface
>>> Virtual-Access2.1.
>>> DHCPD: Allocate an address without class information (10.1.37.0)
>>>
>>> I noticed that on the server it has already assigned 10.1.37.7 - but
>>> not to
>>> the client, besides on this segment there're only 2 routers, R3 (dhcp
>>> server)
>>> and SW1 (dhcp client). Despite numerous attempts to clear the binding
>>> and
>>> reload both routers, R3 still fails to assign 10.1.37.7 to SW1.
>>>
>>> However, if i remove the "ip dhcp excluded-address 10.1.37.1
>>> 10.1.37.6", the
>>> server-end router succesfully assigns 10.1.37.1 to the client - but i
>>> want it
>>> to assign 10.1.37.7. Am i missing anything here?
>>>
>>> Thanks in advance guys.
>>>
>>> Cheers,
>>> -K
>>>
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