using option 82 to assign a static ip-address

[Sten Carlsen]

On 16/12/12 14:17, Nico De Ranter wrote:
>
> Hi,
>
>
>
> I'm trying to use DHCP option 82 to assign a different address to a
> host depending on which network port it is connected to.
> I'vve created the following section in my config:
>
> ############
> stash-agent-options true;
> ...
> subnet 10.103.0.0 netmask 255.255.255.0
> {
>         option routers 10.103.0.1;
>         class "OK1Endo" {
>                 match if  binary-to-ascii(16, 8, ":", substring(option
> agent.remote-id, 2, 7)) = "84:78:ac:84:e5:80"
How will a substring of length 7 match 6 hex values? Is there any reason
to convert into ascii?
>                         and     binary-to-ascii (16, 8, ":", hardware)
> = "1:0:14:2d:40:f:15"
binary-to-ascii will, as far as I can see, return a string of the form
xx:xx:xx:xx ....
How can that match x:x:xx:xx:xx:x:xx - note one or two digits.
>                         and     binary-to-ascii (16, 8, ":",
> substring(option agent.circuit-id, 5, 5)) = "e";
Substring of length 5 should match one letter?
>         }
>         pool {
>                 filename "pxelinux.0";
>                 next-server 10.103.0.202;
>                 option mobile-ip-home-agent 10.103.0.202;
>                 option log-servers 10.103.0.202;
>                 option tz "Europe/Brussels";
>                 use-host-decl-names on;
>                 allow members of "OK1Endo";
>                 range 10.103.0.220 10.103.0.220;
>         }
>   }
> ###########
>
> I'm sure the class definition is correct and the pool matches as I
> also added a log statement which only seems to trigger if the client
> matches the pool (if I change the class definition or remove the
> 'allow members' I don't see the logs appearing in the log files anymore).
>
> However the dhcpd server doesn't seem to send any reply to the host:
> in tcpdump I see a bootp/dhcp request from the clients MAC but no
> replies from the server.  If I replace the 'pool' section with a
> simple 'host' definition the server responds immediately. 
>
> Any ideas what I'm doing wrong?
>
> Note: I'm using a very old version of dhcpd (3.1.1) which
> unfortunately I cannot upgrade at the moment.
>
> Thanks in advance,
>
> Nico
>
> -- 
> Nico De Ranter
>
> Operations Engineer
>
>
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-- 
Best regards

Sten Carlsen

No improvements come from shouting:
       "MALE BOVINE MANURE!!!"

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