I'm helping someone out with their network and some weird things are
happening. The network consists of a few machines. One machine is
connected directly to the router, and 2 machines are connected to a
hub/switch that has a cable from the uplink port going to the router.

One of the machines wouldn't work on the network until I went into the
properties for the nic and put it on half duplex/10. This machine is
connected directly to the router. I'm now trying to add a wireless
access point to the network and when I connect the wireless router to
the wired router it doesn't pull an IP address. This is connected from
a port in the back of the router to a normal port (not WAN) on the
back of the wireless router that I want to use as an access point. I
have set the IP address corectly, and DHCP has been disabled.

There are a few other machines that connect directly to the router
that work fine. They have had intermittent connectivity issues and I
think it has to do with that hub/switch slowing things down or causing
problems. Any ideas?

Hi.  Well first of all you want your duplex settings to match exactly.
 So if a switch port (or router port) is set up for AUTO detection -
you want the workstation to also be set to AUTO.  If there is a duplex
mismatch you get ethernet collisions and performance problems.  So
start there - set everything to AUTO both on the workstations and the
router and the switch.  If you're not sure how to do that on the
router and the switch just try setting all the workstations to AUTO
and see if that helps.  Technically you normally would not plug
workstations into a router - but I think you are referring to a small
home DSL router that has switch ports built into it.

Regarding the wireless device - you need to set this up to be in
"bridging" mode so that its just acts as an extension to your existing
LAN.  Hope that helps.

Which port are you trying to hook up the WAP to?  On many
routers/switches the uplink port is shared with the last normal port,
e.g. port 8 on an 8 port raouter, and you can use one or the other but
not both.

Mike:

The reason I changed the duplex settings on the workstation was
because it wasn't pulling an IP address. When I switched the
workstation to half mode it was able to pull an address.

I'am using a SOHO DSL router (linksys).

I believe that there are collisions happening but how would I narrow
it down based on what I have told you? Do you think that switch/hub
connecting the two machines may be bad?

Some network devices just don't play well with each other. Set
everything to 10/half duplex while troubleshooting. This is because of
silly autonegotiation. Some devices just don't talk at all, even in
this mode, because they have very crappy timing. If your device does
this, throw it out the window, and never buy from that company.

Yes, your AP does need to be in bridging mode. You might need a
crossover cable to connect it.