Unable to Ping / Shared Network

[Barry Stear]

Hi,

I have my isc-dhcp-server setup as a shared network with two subnets that
are using the same interface (eth0). ETH0 is connected to a 5 port switch
which connects Linksys router. The problem I have is that I cannot ping
anything on the internet when I receive an IP address in the 192.168.100.X
subnet. I am unable to ping 192.168.1.2 from the 192.168.100.X subnet.

 I tried changing the 'options routers' for the 192.168.100.X subnet to
192.168.1.2 and that didn't make a difference.

Network Topology
------------------------
Linkysys router (192.168.1.1) --->  5 Port Hub ---- > NIC Eth0
(192.168.1.2)  /  ETH0:1 (192.168.100.1)
Snippet from my configuration

DHCP.CONF
----------------------

option routers 192.168.1.1;
one-lease-per-client true;
get-lease-hostnames true;

shared-network MYNET {

   # trusted subnet
 subnet 192.168.1.0 netmask 255.255.255.0 {
  max-lease-time 172800;
  default-lease-time 28800;

 pool {
  range 192.168.1.10 192.168.1.39;
  option routers 192.168.1.1;
  option domain-name-servers 192.168.1.2;
  option subnet-mask 255.255.255.0;
  deny unknown-clients;
  }
 }

 # untrustedhosts
 subnet 192.168.100.0 netmask 255.255.255.0 {
  max-lease-time 28800;
  default-lease-time 14400;

 pool {

  range 192.168.100.2 192.168.100.6;
  option routers 192.168.1.1;
  option domain-name-servers 192.168.100.1;
  option subnet-mask 255.255.255.0
  allow unknown-clients;
  }
 }
 }


My NIC is setup as follows :

eth0
ipv4 address : 192.168.1.2
netmask 255.255.255.0
broadbase 192.168.1.255

eth0:1 Virtual
ipv4 address : 192.168.100.1
netmask 255.255.255.0
broadcast 192.168.100.255

According to a book I have called The DHCP Handbook I should not have to
setup a route since it is setup as a shared network using a single NIC, i am
unsure what I need to do to route the traffic to my Linksys router
(192.168.1.1)

Let me know if you need any other information..

Any help is appreciated.
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