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SBS2003 Server Can not go online on home network

I can't get my new server online -

Here is the setup -

Dell PowerEdge SC4400 Running SBS2003
Cablevision Cable Modem
Apple Airport Extreme Router
Linksys 8 port workgroup Switch
Home Wiring Closet

My server is plugged into a wall jack, feeding backto a wiring closet. In the closet all the ports are connected to a switch. Feeding the switch is the cable modem. My server says "disconnected" and wont get online. I also have a wireless router to the switch which works fine.

I have server set to 192.168.1.5 / router is .1 / subnet 255.255.240.0 ( as in router) DNS is internal to windows. The subnet is what the apple router is.

When i plug the wire from the server right into the cable modem and do auto obtain ip and dns it connects fine. If i go thru the switch or router it wont work - with either set IP or auto obtain. I cant leave the server just into the modem because i need to get my other computers online via wired and wireless.

Thoughts? The card shows disconnected - i cant even get a local IP or connect to the rotuer or another pc on the same subnet?

This is my first server so I know i am not phrasing the question right either, but I am desparate!



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josephfreer
Asked:
josephfreer
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1 Solution
 
DrDave242Commented:
Are you sure that subnet mask is correct?  Most 192.168.x.x networks are class C, meaning they use a subnet mask of 255.255.255.0.  It's certainly possible to set up a network the way you've got it, but it's not common.  Make sure that 255.255.240.0 subnet mask isn't merely the mask on the external side of your router.  Are you able to connect another machine (an XP machine, for example) to this network and connect to the Internet?
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josephfreerAuthor Commented:
On the apple router it lists the subnet at 255.255.240.0 - i dont know if that is internal or external. I actually tried both 255 and 240 and it still says 'disconnected' with the red x and 'cable unplugged'

I can get online with XP and Mac's wired and wirelessly. Even my slingbox works.

The only way this server sees the internet is if it is right into the cable modem with no layers between and set to auto obtain IP and DNS.
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bluetabCommented:
I think DrDave242 is on the right path here.  The external IP address of the apple router should be XXX.XXX.XXX.XXX with a 255.255.255.240 subnet.  On the internal side of the router, make sure the IP address is 192.168.1.1 and that the subnet is 255.255.255.0.
On the server make sure you have the IP set to 192.162.168.1.5 with a subnet of 255.255.255.0 and that the first DNS server is 192.168.1.1.

If that is all setup correctly, try getting a new network cable.  Make sure you are not using a cross-over cable to plug the server into the router.  You should be using a straight through cable.  
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DrDave242Commented:
On an XP client that is able to get online, open a command prompt and type IPCONFIG /ALL.   You'll then at least be able to see the settings for a machine that works.  You may post the results of the IPCONFIG /ALL here if you'd like.

I just realized that you said that the server's NIC shows up as disconnected/cable unplugged.  This means the server has no connectivity to the switch at all.  Since the server can get online when you're plugged directly into the cable modem, the problem isn't in the server's NIC, but it could be in the wiring between the wall jack and the switch, or it could be the cable from the server to the wall.  If you plug an XP client into that wall jack, can you get online?
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josephfreerAuthor Commented:
Im sorry, I didnt include that if i string a cable from the server's port on the patch panel to the cable modem the server works fine. (if everything is set to auto obtain)

I can get online if i plug an xp client into the same wall jack using the same cable. I will run the ipconfig from the xp machine now on the same port/cable as the server (i'll swap it out with my laptop)


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josephfreerAuthor Commented:
Ok, I think its the cables - crossover vs. straight thru. Sorry guys if this seems too elementary!

Here are the steps I took as you guys outlined:

Laptop right to cable modem via ethernet crossover:
IP: 69.118.203.120
Subnet: 255.255.240.0
DHCP SERVER: 167.206.251.9
DNS SERVERS: 167.206.251.10 / 167.206.251.73
- Online ok, pings ok.

Cable modem to switch with crossover (held end to end they dont match up on opposite sides)
Switch to Apple Router WAN port with crossover
Laptop to Apple router ethernet port with crossover
IP: 192.168.1.9
SUBNET: 255.255.255.0
Gateway: 192.168.1.1
DHCP:192.168. 1.1
DNS 192.168.1.1
- online ok, pings ok

Laptop into switch with crossover cable
DISCONNECTED
- not online, fails pings

Laptop into wall jack (via crossover) with patch panel connected to switch with crossover
DISCONNECTED
- not online, fails pings

CURRENT SETUP: Cable modem to switch (crossover); switch to wireless router (crossover); patch ports to switch (crossover); wall ports to pc's (crossover).

Wireless works fine -
IP: 192.168.1.4
SUBNET: 255.255.255.0
Gateway: 192.168.1.1
DHCP:192.168. 1.1
DNS 192.168.1.1
- online ok, pings ok

So does this mean from my patch panel to my switch i need straight thru cables? or somewhere else?

Should I go from the cable modem to the wireless router first, then to the switch?

I dont have any straight thru cables to test, only the ones you get in the linksys boxes etc...
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DrDave242Commented:
Yep, it looks like it is indeed the cables.  In most cases, you shouldn't need to use crossover cables; they're used mostly for connecting one PC directly to another without going through a switch, and sometimes for connecting network devices like switches and routers to one another.  For things like connecting PCs to switches, though, straight-through cables are what you'll want 99% of the time.  A lot of the newer NICs (and switch ports as well) are auto-sensing, which means they'll detect whether you're using a crossover or straight-through cable and act accordingly.  This is great, but if you happen to plug in a machine with a NIC that isn't auto-sensing, and it's not connected using the expected cable type, it won't see the network, and you'll be at a loss as to why the previous machine connected to the same cable worked just fine.

Regarding your current setup, you should plug your router's WAN port into your cable modem and one of its LAN (Ethernet) ports into the switch (if the switch has a dedicated uplink port, use that one).  Then, your patch panel should be cabled into the other switch ports.  You're most likely going to want straight-through cables for all of this, although if your cable modem-router-switch connections work using crossover cables, there's no need to change them to straight-through.  You should also be able to use straight-through cables from your wall jacks to your PCs.

One other thing:  You will definitely want to use a 255.255.255.0 subnet mask on all of your machines, as shown in the IPCONFIG results you posted.
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josephfreerAuthor Commented:
How can I really tell what cables are what - i just by off the shelf patch cables, and as I stated they go end to end touching with clips down and the wires don't line up - is this the right way?

I've changed the subnets to 255 as listed and changed the order - Cablemodem, wireless router WAN, ethernet to switch. i guess it is off to bestbuy to see if i can find straighthru cables to try connecting the patch to the switch
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josephfreerAuthor Commented:
ok, I give up!

I went to best buy and what they have listed as crossover is opposite of what i have - looks like the online article was wrong! i'm using ALL straighthru cables

Server to Cable Modem - via patch panel and straightthru cable
connected, with
IP: 69.118.203.120
Subnet: 255.255.240.0
DHCP SERVER: 167.206.251.9
DNS SERVERS: 167.206.251.10 / 167.206.251.73
- Online ok, pings ok.

Once i move it from anywhere other than directly to the cable modem it 'dissapears' and shows "network cable unplugged". I don't even get lights on my router or switch's activity area to show that it is plugged in!

I know the wiring is good from jack to patch, and i know the cable from server to jack and patch to modem are ok since they give me the above info. its just once i move it, i lose it.

im going to try a wireless usb adaptor, i've had it!
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bluetabCommented:
The best way to tell a crossover is to do what you did earlier, hold up both ends together and make sure they don't match.  Also a lot of crossover cables have that written on the cable themselves.  
The easiest thing to try would be to replace the Apple Airport Router with a Linksys Wireless Router.  The Apple Router may connected differently and causing problems.  

If you want you can try the following instead, but I would change the router.
I noticed that you were plugging the switch into the modem and the modem into the Apple Router.  Follow DrDave242 here and try the following:
1) Plug the modem into the WAN port of the router.  You should be able to use a straight-thu cable but the Apple router may require a cross-over.
2) Plug one straight-through cable from the LAN port of the router into the switch (some switches have uplink ports, if yours does make sure you use this port)
3) Use straight through cables to connect the ports on the switch to the appropriate patch panel ports.  

You also said that the laptop was able to connect to the Apple Router with a cross-over.  If you're still having problems try taking the switch out of the equation and plug the server directly into the router.  First try with a cross-over and if that doesn't work try the straight-through
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josephfreerAuthor Commented:
I've tried to isolate the problem and have it down to this:

Once i move the server cable (straight-thru) from anywhere other than directly to the cable modem (via patch panel) it 'disappears' and shows "network cable unplugged". I don't even get lights on my router OR switch's activity area to show that it is plugged in!

I will try a linksys router tonight to see if that makes a difference.
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DrDave242Commented:
Sorry, I went home yesterday and forgot to check back in.  This is starting to get a little strange.  If you bypass the patch panel and run a cable directly from the server to the switch (using something other than a dedicated uplink port, if there is one), it still shows up as disconnected?
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josephfreerAuthor Commented:
I'll have to get an extra long cable to test or drag the server over. I'll do that tonight. Sorry to keep this question open so long but this annoys this crap out of me!
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