Sending IP range not in same range as Ethx
dhcp1 at thehobsons.co.uk
Thu Aug 9 18:12:28 UTC 2012
> I have a problem setting subnet that is not part of the IP range on
> which the Eth of the machine running DHCP daemon is.
> My need :
> Send IP within 10.19.1.1 to 10.19.13.254
> mask 255.255.240.0
> gateway 10.19.0.1
> Problem is that the Eth1 on wich the dhcp machine is running is not
> in 10.19 range so when I start it it say it cannot find any
> interface with that subnet.
Correct, it will
> Why do it need to be in same subnet ? is it for DHCP negociation
> when it tries to echo the IP it will propose to see if it is
> actually used ?
Because that's the way the server operates. You *MUST* have a subnet
declaration that matches each subnet on all the interfaces teh server
is listening on. If you aren't serving clients in a subnet then you
can just leave it's declaration empty (specifically no range
> Second question, what is the parameter that permit to set 10.19.0.1
> as gateway ?
Is this a locally attached subnet, or one that the other side of a router ?
Or put another way, are the server and clients on the same broadcast domain ?
If the clients are on the same network, then you have a shared
network - look up shared-network in man dhcpd.conf.
If the clients are remote (ie not directly attached to the server),
then all you need to do is configure a suitable DHCp Relay agent on
the remote network and configure the right subnets in the DHCP server.
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