Re: DHCP and IP routing

[johnc <johnc909@comcast.net>]

Hi, I'm not sure how to have dhcpd ignore the setting altogether, but in 
my experience, at least leaving the nameserver entries undefined causes 
the subsequent dhcp clients to use their static defaults.

The config statement for setting the default route is "option routers 
<ip-addr>", and is, I believe usually scoped to within individual subnet 
declarations.

I personally dislike having to manage static configs.

For more on dhcpd.conf commands, you can always "man 5 dhcpd.conf"

-John


Urs Thuermann wrote:

> How can I ignore or change the default route that I get from a DHCP
> server?  For example, on a DHCP client running Debian testing using
> the dhclient from the dhcp-client package, I get
>
>    IP address   10.1.2.3
>    netmask      255.255.255.0
>    router       10.1.2.254
>
> which causes the foloowing routing table to be set up:
>
>    10.1.2.0/24  dev eth0  proto kernel  scope link  src 10.1.2.3
>    default      via 10.1.2.254  dev eth0
>
> However, I want to use another default route which I set statically in
> /etc/network/interfaces.  So I'd like to ignore the default route
> offered by the DHCP server.  Even better would be to install a route
> for the subnet using the router given in the DHCP reply, i.e.
>
>    10.0.0.0/8  via 10.1.2.254  dev eth0
>
> How can I configure this is /etc/network/interfaces and/or
> /etc/dhclient.conf?
>
>
> urs
>
>
>