Not able to change the default gateway. It just takes what ever the IP address is

Step one turn on PC directly connected to ModemsbSB6121 without Wi FI router being involved.
Step two go to Command prompt type in ipconfig (press enter)
Step three note IP address of default gateway and ip address issued to P.C.
Step four type in default gateway address into browser and log into Modem.
Step five look for DHCP Server and allocate IP addresses from at least 50 for example 192.168.0.50 starting ip lease ending ip lease 192.168.0.254
Step six connect Wi Router to P.C. via ethernet cable only - remove ModemSB6121
Step Seven shutdown and restart p.c
Step Eight go to Command prompt type in ipconfig (press enter)
Step Nine note IP address of default gateway and ip address issued to P.C.
Step Ten type in default gateway address into browser and log into Wi Fi Router
Step Eleven Change IP address on Router to 2 as example 192.168.0.2. (it has to match in that modem device would have been 192,168.0.1)
(if it was 10.0.0.1 make wi fi 10.0.0.2 make sure subnet mask is the same like 255.255.255.0)
Step twelve Change DHCP Server to off
Step Thirteen may need to set default gateway to MODEM IP address for example 192.168.0.1
Step Fourteen plug modem router into Wi Fi router may need to plug into WAN port on WI FI router .
Step Fifteen shutdown and Restart Computer
Step Sixteen go to Command prompt type in ipconfig (press enter)
Step Seventeen type in PING 192.168.0.1 (if this is modem IP address and default gateway IP addess)
All this above is to avoid IP address conflicts or mismatching
Subnet mask should be 255.255.255.0
either it uses 192.168.0.1 or it uses 10.0.0.1 make sure Wi FI router is set to different address to Modem Router.
I suspect either a clash occurs or your P.C gets a different IP range from ther WI FI DHCP server.
Happy troubleshooting !

You must assign an IP address to the switch to gain management access over the network. You may also need to a establish a default gateway between the switch and management stations that exist on another network segment. You can statically configure a specific IP address or direct the switch to obtain an address from a Boot Protocol (BOOTP) or Dynamic Host Configuration Protocol (DHCP) server when it is powered on. Valid IP addresses consist of four decimal numbers, 0 to 255, separated by periods. Anything outside this format is not accepted by the CLI program. NOTICE: By default, the IP address is assigned to VLAN 1 through DHCP. If you select the bootp or dhcp option, IP is enabled but does not function until a BOOTP or DHCP reply has been received. Requests are broadcast periodically by the switch in an effort to learn its IP address. (BOOTP and DHCP values can include the IP address, default gateway, and subnet mask).
To display assigned IP settings using the CLI:

1. From the Privileged Exec or Normal Exec level mode, type show ip interface and press <Enter>.
   
   

The assigned IP address and subnet mask displays.

1. From the Privileged Exec mode, type show ip redirects to display the assigned gateway IP address. Press <Enter>.
   
   

The following example displays IP settings assigned by bootp or dhcp using the CLI.

Console#show ip interface

IP address and netmask: 10.1.0.1 255.255.252.0 on VLAN 1,

and address mode: User specified.

Console# show ip redirects

ip default gateway 10.1.0.254

Console#
Before you can assign a static IP address to the switch, you must obtain the following information from your network administrator:

• IP address for the switch
  
  
• Default gateway for the network
  
  
• Network mask for the network
  
  

To assign a static IP address to the switch:

1. From the Privileged Exec level global configuration mode prompt, type interface vlan 1 to access the interface-configuration mode. Press <Enter>.
   
   
2. Type ip address ip-address netmask, where ip-address is the switch IP address and netmask is the network mask for the network.
   
   
3. Type exit to return to the global configuration mode prompt. Press <Enter>.
   
   
4. To set the IP address of the default gateway for the network to which the switch belongs, type ip default-gateway gateway, where gateway is the IP address of the default gateway. Press <Enter>.
   
   
5. To save your configuration changes, type copy running-config startup-config and then press <Enter>.
   
   

NOTICE: Only one VLAN can be assigned an IP address. If you assign an address to any other VLAN, the new address overrides the original IP address. The following example shows how to set a static IP address using the CLI.

Console(config)# interface vlan 1

Console(config-if)# ip address 192.168.1.5 255.255.255.0

Console(config-if)# exit

Console(config)# ip default-gateway 192.168.1.254

Console(config)#
To configure the switch for DHCP or BOOTP:

1. From the Privileged Exec level global configuration mode prompt, type interface vlan 1 to access the interface-configuration mode. Press <Enter>.
   
   
2. At the next prompt, use one of the following commands:
   
   
   • To obtain IP settings through DHCP, type ip address dhcp
     
     
   • To obtain IP setting through BOOTP, type ip address bootp
     
     
3. Press <Enter>.
   
   
4. To save your configuration changes, type copy running-config startup-config, and then press <Enter>.

When configuring an address for the printer, the IP configuration might look like (just an example):

IP Address - 192.168.1.2

Subnet Mask - 255.255.255.0

Default Gateway - 192.168.1.1

It's important to note that even though you are not using any IP addresses in the default range for DHCP, the Subnet Mask and Default Gateway addresses will be THE SAME.

If you have another device on your network that will be assign a fixed address, you would use for example:

IP Address - 192.168.1.3

Subnet Mask - 255.255.255.0

Default Gateway - 192.168.1.1

For any other devices, just increment the IP address by one, 192.168.1.4, 192.168.1.5, etc and use the same Subnet Mask and Default Gateway.
(see the owners manual or site for steps on configuraing the printer TCP/IP information). This should take care of any conflicts.

I'm not sure if your asking for the IP ADDRESS of your Linksys or the DEFAULT GATEWAY of that device because your router's ip address will be provided by your server or Internet Service Provider (ISP) depending on your service. There are two ways of obtaining an ip address first will be DYNAMIC, where your ip address changes all the time and STATIC where you are given specific ip addresses for example 192.168.0.1 -to 192.168.0.25. The easiest way to obtain those ip addresses, by the way, is to contact your Internet Service Provider (ISP)
example: AT&T, Roadrunner, Time Warner, etc....

But, if your looking for the DEFAULT GATEWAY for you to access your router's configuration, most of the time it is found underneath the router itself. For Linksys the Default Gateway is 192.168.1.1

>I hope i helped you out with this... Enjoy!

Default gateway is the IP address of the router.
Connect the computer to the router.
Open the setup page of the router using the current default gateway number.
On the setup page of tghe router, you will see the router local IP address.
You will find the current IP address of the router there.
If you want to change the default gateway, you can change the router Local IP address.
Make sure that it will be a private IP address only and not the public IP address.
suppose the current default gateway is 192.168.1.1.
You can change it to 192.168.x.y. X and Y will be the number between 0 to 254.

Click Here for more information about the routers and network

Is there any computer connected to the router with the cable ?
If not then you will need to connect the computer to the router.
Check the Ip address and default gateway. default gateway will be the current Ip address of your router.
Once you open the router set up page with the current IP address , you will be able to change the IP address of the router

Click Here for more information about the router and network

By default ip address is 192.168.1.1
or
192.168.0.1

But if your ip is different and if in your router DHCP is enabled then you have to check your computer ip address with which your router is connect.
Go to start menu then type in run "ipconfig /all"
then check gateway ip it is your router ip.
Also you can check your ip wtih phone reciver connect your phone receiver to router with phone line jack.
Then press * so you can listen configuration.
Let me kow if you need more assistanse.
Thanks.

set your ip setting to "Obtain an IP address automatically", then plug your ethernet cable to your system, once connected, open a command prompt then type 'ipconfig' (w/o ""). your IP add, subnet mask & default gateway will display. take note, the default gateway is the ip address of your router.

Nore than likley that is the default LAN IP address that came with the device. It has probably been changed during the initial setup. A quick way to tell is go to your start button/ select run / type in the run box CMD / this brings up a dos shell in the dos window type IPCONFIG and hit enter.. Note your IP address and your default gateway.. " the default gateway is your device in question. make sure your IP address matches your gateay with the exception of the last 3 octects. so it should read something like this

IP Address 192.168.1.50
Subnet mask 255.255.255.0
Gateway 192.168.1.1

My guess is that your not on the "1" network but the router is handing out a different range of address if that is the case in the dos window type ping (the ip address of your default gateway)
like so ping 192.168.X.X where X = the octet values of the default gateway listed in the dos window

If it replies then your talking just fine you are simply trying to access your router via the wrong IP so take the IP of the gateway listed from the ipconfig command and put that number in your browser.

If this is not the case then we need to go in a different direction with this.

MilToN
CNA,CNE,MCSE,CCNA,Network +