This type of config is a
real simple and is a basic set up for use of your DSL on a network. Below are
the key factors to making this topology work:

CONNECTING THE
CISCO TO THE HUB

• When connecting the
  Cisco to the hub you can connect it to the uplink port or to a regular port.
  The key thing 
  
  to remember at this point is that UPLINK ports are meant to connect with
  CROSS OVER cables, whereas regular 
  
  port are meant to use straight through cables.


• UPLINK PORT =
  CROSSOVER CABLE


• REGULAR PORT =
  REGULAR CABLE


• Another thing to keep in mind here is
  that on some hubs when you plug a cable into the uplink port that will 
  
  disable one of the ports on the hub. Usually the port will be the port that
  is physically closest to the uplink 
  
  port on the hub, but this may very from manufactures. Check you
  documentation to be sure.

CONNECTING THE WORKSTATIONS

• All you have to do with the
  workstations is connect them to regular ports on the hub.


• The TCP/IP settings for workstations
  should be set on obtain an IP address automatically/DHCP server.

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This page will help you set up an NT
server with two network cards in it.

This set up is a more involved setup but
is still not that difficult to get working. Below is the physical set up for the
equipment.

CONNECTING THE CISCO TO THE
SERVER

• Key thing to do when connecting your
  Cisco 675 to your NT Server is to have a CROSSOVER CABLE. 
  
  When going from Cisco 675 to a
  computer you must use a CROSSOVER cable.
  

CONNECTING THE NT SERVER TO THE
HUB

• When connecting the NT Server to the
  hub you can connect it one of two ways. You can connect it to the 
  
  uplink port on the hub or into a regular port. Key thing to know here is
  UPLINK ports are meant for CROSSOVER cables and regular ports and meant for
  straight through cables.


• UPLINK PORT =
  CROSSOVER CABLE


• REGULAR PORT =
  STRAIGHT THROUGH CABLE


• Another thing to keep in mind here is
  that on some hubs when you plug a cable into the uplink port that will 
  
  disable one of the ports on the hub. Usually the port will be the port that
  is physically closest to the uplink 
  
  port on the hub, but this may very from manufactures. Check you
  documentation to be sure.

CONNECTING THE WORKSTATIONS TO
THE HUB

• All you have to do here is plug the
  computers into the hub with a straight through cable into regular ports.
  

Below is the set up for the TCP/IP
properties of the server and workstations. This is where the set up gets a
little more complex and involved. You must have everything set up correctly and
pointing to the right IP's on the network components.

TCP/IP PROPERTIES
(this example is using 10.0.0.x scheme, you may have to adjust the IP settings
accordingly)

• You will need to go to the network
  control panel. Once in the network control panel you will need to go 
  
  to the protocol tab and then double click the TCP/IP protocol. This is where
  you will set up the settings below. 
  
  One key thing you will need is ; click on the routing
  tab of the TCP/IP protocol and put a check in the box 
  
  next to "enable IP forwarding".
  

	NIC connected to hub (LAN side)	NIC connected to Cisco 67x (WAN side)
IP address	10.0.0.3	10.0.0.2
Subnet Mask	255.255.255.0	255.255.255.0
Gateway	10.0.0.2	10.0.0.1
Primary DNS	204.147.80.5	204.147.80.5
Secondary DNS	206.196.128.1	206.196.128.1

	Workstation A	Workstation B	Workstation C	Workstation D	Workstation E
IP address	10.0.0.4	10.0.0.5	10.0.0.6	10.0.0.7	10.0.0.8
Subnet Mask	255.255.255.0	255.255.255.0	255.255.255.0	255.255.255.0	255.255.255.0
Gateway	10.0.0.3	10.0.0.3	10.0.0.3	10.0.0.3	10.0.0.3
Primary DNS	204.147.80.5	204.147.80.5	204.147.80.5	204.147.80.5	204.147.80.5
Secondary DNS	206.196.128.1	206.196.128.1	206.196.128.1	206.196.128.1	206.196.128.1

The way this all works is when a
workstation wants to access something on the internet it will ask itself how do
I get to the internet. The answer is in its TCP/IP properties, it has a gateway,
it must go to the gateway to get to the internet. The gateway will be set to
your NT Servers NIC card IP address (10.0.0.3) that is connected to the hub.
When the request makes it to that network card on the hub side it also has a
gateway that it must go to, which would be the second network card (10.0.0.2) in
the NT Server that is connected to the Cisco 675. When the request is forwarded
to the second Ethernet card it also has a gateway, the gateway is 10.0.0.1 which
is the IP address of the ENET port on the Cisco 675. When the request is
forwarded to the Cisco 675 it is then Network Address Translated (NAT) to the
Internet valid IP address and then routed out onto the Internet to get the
request of the original workstation and brought back through the same process in
reverse to hand it off to the original workstation.