DHCP for multiple networks with static and dynamic assignments

Bruce Hudson Bruce.Hudson at Dal.Ca
Fri Mar 2 22:43:47 UTC 2007

>      pool {
>        failover peer "ict";
>        deny dynamic bootp clients;
>        range;
>        range;
>        allow unknown clients;
>        option routers;
>        option domain-name-servers,;
>        max-lease-time 3600;
>        default-lease-time 900;
>      }
>    }
> }
> host kangoo     {
>    hardware ethernet 00:14:22:E0:CE:3F;
>    fixed-address kangoo;
> }

    The statement "allow unknown clients" implicitly denies everybody else,
your known clients. I know that in ancient versions of the server, a host
entry with a fixed address only made the client "known" on the subnet that
matched that IP. As mentioned earlier you had to define an ethernet address
twice, once with a fixed address and once without, to allow it to be known
on other subnets. I had the impression this is no longer true but I confess
that I have not tested it in years. 

    Try removing the "allow unknown clients" statement. If a defined host
has a fixed address this will be given in preference to a pool address so it
should not be necessary as far as I can see.
Bruce A. Hudson				| Bruce.Hudson at Dal.CA
UCIS, Networks and Systems		|
Dalhousie University			|
Halifax, Nova Scotia, Canada		| (902) 494-3405

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