how to establish a wireless router ip address

You have to manually assign an IP address to the box you have directly connected to the hotspot.  So if your hotspot's IP is on a 192.168.2.x subnet assign your computer an IP address of 192.168.2.200 and then try to connect to the web interface.

The topology of your network isn't clear.  You have all those boxes but how are they connected together?

Here is a paper that may help address some of your issues.  But, I sense that more information would be very helpful in helping youi.
Multiple-Subnets.pdf

Here is another paper that may address your situation.

When you say that a router has an IP address of something like 192.168.0.xxx and that's all then there's a bunch of important information that's missing.  
What is connected to the WAN/Internet port on the router?  What is the IP address there?

I might have expected you to say that the firewall device was providing a separate VLAN for the wireless routers.  But even that's not clear.

If you use the wireless routes as a simple switch as shown in the attached paper here, then:
- you will surely turn off DHCP on those routers.
- except for convenience, it doesn't matter *what* IP address you've assigned to the router.  That only affects how you access the control panel via GUI or telnet.
Of course, if you're going to have computers on a particular subnet, particularly using DHCP, then it's handy to have the routers with addresses in the same subnet.  But, they don't generally get addresses via DHCP on the LAN side.  So, you have to manually enter a LAN subnet IP address for them.
Wireless-Router-as-a-Simple-Swi.pdf

thank you all for your prompt resonses,  i will try to describe the network setup as well as possible below:

Our LAN is behind a firewall with an ip address  of 192.168.1.147. the LAN ip address range is 192.168.1.1-255.



INTERNAL LAN
IP: 192.168.1.1-255
DNS 192.168.1.2
Default Gateway 192.168.1.147(firewall)


In order to provide clients with access to internet while on site, at the firewall a seperate network( u could call it a VLAN, not sure as i have not seen the configuartion of the firewall) has been setup with an ip rage of 192.168.100.1-255. on this network we have 4 wireless routers connected one on each floor all provid ip address range 192.168.100.1-255.

EXTERNAL WIRELESS
IP: 192.168.100.1-255
DNS: 195.216.16.129
          195.216.16.65
Default Gateway 192.168.100.1 (firewall)




DHCP has been disabled on all the wireless routers as the DHCP reuests are provided by the default gateway.

i wanted to be able to access each one of these wireless routers by connecting to them directly using a network cable. however i cannot establish the router ip address.

many thanks

For the Linksys, "SRX200" is a wireless feature, not a model number. The model and version number will be on the barcode sticker affixed to the bottom of the unit. The MAC address should be on that sticker, too. I have yet to see a wireless device that did NOT have the MAC address on it somewhere.

Anyway, open a command prompt and run
arp -a

That should give you a list of recent IP addresses your computer has communicated with, along with their corresponding MAC addresses. Compare the MAC addresses with the one on the sticker. Usually, on a wireless router there will be at least 3 MAC addresses...  1 for the WAN port, 1 for each radio, and 1 for the LAN ports, and typically they will be sequential. Often, only the WAN port's MAC address is on the label, so if you can't find an exact match look for one in the ARP table that only differs in the last of the 6 octets.

When I setup a wireless device, if I change the default IP address, I like to record it on a 1.5''x2'' post-it, and apply extra stickum with Scotch #6307 so there are no loose edges when I stick it to the bottom (being careful not to block any vent holes). Then if I have to come back to it 2 years later, remembering the non-default IP address isn't a problem.

You could also give the wireless adapter in your laptop an IP address in the 192.168.100.0 network and try running Angry IP Scanner set to scan the range 192.168.100.1 to 192.168.100.254 and see how many hits it gets.

As I mentioned before, you don't need IP addresses for the wireless routers except to access their control panels .. as long as you connect the LAN side of the router to the network and *not* the WAN side at all.

You do this:
1) plug a network cable into the *LAN* side of each wireless router.
2) turn off the wireless router DHCP (which you have already done)
3) assign the control interface of the router an IP address that's on the LAN subnet and not in conflict with anything else and not in the DHCP range of the gateway DHCP server.

> As I mentioned before, you don't need IP addresses for
> the wireless routers except to access their control panels

The way I understood the asker, they couldn't remember what non-default IP address they had assigned it in the 192.168.100.0 network, and they're trying to discover it in order to access the menus without resetting it (which would mean redoing all its configurations).

Could you clarify, please, X-quisite?

OK.  I read:

how do i establish the router ipaddress so that i can access the router settings via a browser?

There are two ways:
1) if you know the current address then you put that address in a browser URL address and GO.
1A) if you don't know the current address then you might use a tool like Ping Scanner Pro and ping all the addresses in the subnet range to see which ones are "OK" / alive.  Then you use the list of OK addresses to decide which one to try first and go through the list....
OR
2) you take the router off line / off the network, reset it, connect a laptop to it getting an address automatically.  You access it at this point by running command line "ipconfig /all" and finding the gateway address.   Then you put that gateway address into your browser.   Once you have the contro panel interface up you then make the settings you want INCLUDING the IP address that you want it to have.  Thereafter you have to access it with the new IP address and may have to renew the laptop address to do that.

The other way is this:

If the router has a serial port connector then you can connect via the serial port without having the IP address.  Then you can change the router's IP address without taking it off line.

Thank you all for your help.

Darr247  is correct, that is exactly what i am trying to do.

i have downloaded net scanner and angryip scanner and scanned to  network, all these tools are only showing me devises that are connected, not the actual wireless routers, i have compaired the router mac address to all the devices that appear in scan with no luck.

I have treied the command arp -a also with no luck.

I do not want to go down the route of resetting the router as i do not have/know the configuration.

Milad