Assignment of IP adddress based on vendor MAC address

["Fernando André F. Ribeiro"]

Maybe related to this problem ( post ) ;
I'm trying to get the chaddr from the client dhcp DISCOVER message to
compare to a set of existing hardware subclass's , but the field is empty.

'chaddr'   client's hardware

Sep 24 05:59:05 pow dhcpd: DHCPDISCOVER from 00:11:e3:54:a4:b9 via
192.168.200.254: work home: no free leases
Sep 24 05:59:05 pow dhcpd: Lease for 1:0:11:e3:54:a4:11
Sep 24 05:59:05 pow dhcpd: 0:11:e3:54:a4:11

I only can return this value after a DHCPACK .

Thank you for any help, or tips in advance.

Simon Hobson wrote:
>    *** From dhcp-server -- To unsubscribe, see the end of this message. ***
> 
> Atiqur Rahman Mohammed wrote:
> 
>> subnet 7.7.7.0 netmask 255.255.255.224 {
>>        pool {
>>                 failover peer "dhcp";
>>                 range 7.7.7.3 7.7.7.30;
>>                 deny dynamic bootp clients;
>>                 allow members of "stb-device";
>>                 deny members of "voip-device";
>>                 deny unknown clients;
>>                 }
> 
> 
> 
> 
>> When a client from the voip-device request IP from the DHCP server, the
>> following error message logs in the log file:
>>
>> *Mar  4 15:44:03 nms dhcpd: [ID 702911 local1.error] DHCPDISCOVER from
>> 00:09:6b:da:3d:b0 via 6.6.6.1: peer holds all free leases
>> Mar  4 15:44:07 nms dhcpd: [ID 702911 local1.error] DHCPDISCOVER from
>> 00:09:6b:da:3d:b0 via 7.7.7.1: peer holds all free leases
>> Mar  4 15:44:31 nms last message repeated 2 times
>> Mar  4 15:50:12 nms dhcpd: [ID 702911 local1.error] DHCPDISCOVER from
>> 00:09:6b:da:3d:b0 via 8.8.8.1: peer holds all free leases
>> Mar  4 15:50:22 nms last message repeated 2 times
>> *
>> I am using the ISC DHCP version 3.0.4b2.
>>
>> Please help me in the resolution of this problem.
> 
> 
> I don't know if it is the cause or not, but you should not mix allow 
> and deny in a pool - it does not work in any manner you might expect !
> 
> If you use allow, then anything not explicitly allowed is 
> automatically denied. Similarly, if you use a deny, then anything not 
> denied is automatically allowed.
> 
> So what you might expect to be the result of :
> 
>                  deny dynamic bootp clients;
>                  allow members of "stb-device";
>                  deny members of "voip-device";
>                  deny unknown clients;
> 
> would be achieved just by :
> 
>                  allow members of "stb-device";
> 
> Also, I believe dynamic bootp clients are not supported by failover 
> so no need to specifically exclude them.
> 
> Simon
> 
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