Question about Static Reservation and Fail-Over

Chris Buxton cbuxton at
Mon May 11 20:53:35 UTC 2009

In theory you could, but in practice you probably shouldn't. Again,  
don't specify the router in the reservation, specify it in the subnet.

Chris Buxton
Professional Services
Men & Mice

On May 11, 2009, at 12:15 PM, Carlos Dias wrote:

> Thank you.
> I did'nt think about actually sending out multiple routers in the
> subnet.... is there some kind of limitation ?
> Or can i just push lets say 100 routers to the clients ?
> -cmdias.
> On Mon, May 11, 2009 at 12:44 PM, Chris Buxton  
> <cbuxton at> wrote:
>> On May 11, 2009, at 8:15 AM, Carlos Dias wrote:
>>> I'm running a 150 "Shared-networks" setup with ISC DHCP 4.0.1
>>> To make it easier to manage I have one (1) config file for each  
>>> shared
>>> network that i "include" in my DHCPD.CONF
>>> Some workstations have a reservation in multiple "Shared-networks"
>>> Right now I’m doing static reservation in each of the
>>> "Shared-networks" for each user... but this is getting complicated  
>>> and
>>> messy.
>>> Now the questions:
>>> -       Is there a way to create a main reservation file  
>>> (static.leases)
>>> were I can reserve the IP's for the same HOST across the different
>>> "Shared-networks" ? I tried via a global reservation but am having
>>> trouble providing the clients with their "Gateway" (default router).
>> Yes. Create your single global host declaration, with a variety of  
>> fixed
>> addresses. Then put the routers list in each subnet (not in each  
>> pool).
>> Remember that reserved addresses inherit configuration from the  
>> subnet, but
>> not from a dynamic pool.
>>> -       Is there a way to run ISC DHCP in failover mode but without
>>> "Load-Balancing"
>> Not to my knowledge.

More information about the dhcp-users mailing list