[c-nsp] DHCP pools: how to assign priority

[David Prall]

It because of the secondary addressing the router is only looking at the
primary address to match.

You can use the dhcp smart relay agent
http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_chap
ter09186a00804412bf.html#wp1089419

But, you will need to make the secondary address the primary address so that
it is used first.

David

--
David C Prall dcp at dcptech.com http://dcp.dcptech.com
  

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of 
> Dmitry Cherkasov
> Sent: Thursday, May 11, 2006 7:33 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] DHCP pools: how to assign priority
> 
> I configure two dhcp pools, one dynamic and the other static (the base
> is loaded from an external file). Is there a way to force cisco
> provide dhcp-clients with leases from the static base if their MAC is
> present there and fall back to dynamic only if a corresponding MAC is
> absent in the static base?
> 
> For example:
> 
> ip dhcp pool Dynamic
>  network 10.1.1.0 255.255.255.0
>  ...
> ip dhcp pool Static
>  origin file tftp://tftp.local/static.db
>  ...
> interface FastEthernet0
>  ...
>  ip address 10.1.1.1 255.255.255.0
>  ip address 172.16.1.1 255.255.255.0 secondary
>  ...
> 
> Now I see the following:
> 
> Router#sh ip dhcp bin
> Bindings from all pools not associated with VRF:
> IP address          Client-ID/	 	    Lease 
> expiration        Type
> 		    Hardware address/
> 		    User name
> 172.16.1.2/24        0080.c7bc.09c4          Infinite         
>        Static
> 10.1.1.2             0080.c7bc.09c4          May 11 2006 
> 01:58 PM    Automatic
> 
> 
> I.e. a client 0080.c7bc.09c4 that is present in the static base
> obtains a lease from dynamic pool.
> 
> -- 
> Dmitry Cherkasov
> 
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