[K12OSN] Two subnets

David Hopkins dahopkins429 at gmail.com
Tue Jan 23 22:49:29 UTC 2007


On 1/23/07, Michael Blinn <mblinn at peopleplaces.org> wrote:
>
>   I'm finally trying my two-subnet setup and have run into an issue. The
> story goes like this: Client initiates on subnet 192.168.1.0/24 to
> server's eth1 of 192.168.1.254 and is ACK'd 192.168.1.251 -- Client boots
> kernel. Client requests 192.168.0.253 on subnet 192.168.1.0/24 to server's
> eth1 of 192.168.1.254 and is ACK'd 192.168.0.253. Then, client attempts to
> mount the root partition of 192.168.0.254:/opt/ltsp/i386, and it hangs.
>
> I've gone through my dhcpd.conf file (attached for edification) and don't
> notice anything jumping out at me. The logs are pasted below. Does anyone
> have any suggestions? Is my DHCP handing out incorrect addresses, not
> limiting them by subnet? Is this caused by an invalid configuration?
>
> Jan 23 15:02:09 mail dhcpd: DHCPDISCOVER from 00:10:5a:19:b3:fa via eth1
> Jan 23 15:02:09 mail dhcpd: DHCPOFFER on 192.168.1.251 to
> 00:10:5a:19:b3:fa via eth1
> Jan 23 15:02:10 mail dhcpd: DHCPREQUEST for 192.168.1.251 (192.168.1.254)
> from 00:10:5a:19:b3:fa via eth1
> Jan 23 15:02:10 mail dhcpd: DHCPACK on 192.168.1.251 to 00:10:5a:19:b3:fa
> via eth1
> Jan 23 15:02:15 mail dhcpd: DHCPDISCOVER from 00:10:5a:19:b3:fa via eth1
> Jan 23 15:02:16 mail dhcpd: DHCPOFFER on 192.168.0.253 to
> 00:10:5a:19:b3:fa via eth1
> Jan 23 15:02:16 mail dhcpd: DHCPREQUEST for 192.168.0.253 (192.168.1.254)
> from 00:10:5a:19:b3:fa via eth1
> Jan 23 15:02:16 mail dhcpd: DHCPACK on 192.168.0.253 to 00:10:5a:19:b3:fa
> via eth1
>
> (this is the point at which the client hangs attempt to mount root)
>

A quick guess:  From the above it seems you have only 1 NIC for the subnet?
Why is eth1 responding on both subnets?  Terrel's setup was using 2 NICs:
one for each subnet.

Sincerely,
Dave Hopkins
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