How do I change the IP address of a cisco 1200 AP?

Sounds like you want to connect using a console cable to the AP? If so follow the directions from the Install guide below. If not please clarify.

Copied from http://www.cisco.com/en/US/docs/wireless/access_point/1200/vxworks/installation/guide/higch3_2.html


Using a Terminal Emulator
This section provides instructions for using the console port and Microsoft's HyperTerminal to set basic access point settings; other terminal emulator programs are similar. Typically, you would use the serial interface when the access point is initially being configured with basic settings and is easily accessible. When the access point is initially configured and mounted in an elevated operating location, the browser interface is more convenient to use to make access point configuration changes.

Selecting Pages and Settings
With the serial interface, when you enter names and settings that appear in brackets you jump to that page or setting. HyperTerminal jumps to the page or setting as soon as it recognizes a unique name, so you need to enter only the first few characters in the page or setting name. For example: to jump from the home page to the Setup page, you only need to type s.

Applying Changes to the Configuration
The serial interface's auto-apply feature is on by default, so changes you make to any page are applied automatically when you move to another management page. To apply changes and stay on the current page, type apply and press Enter.

Assigning Basic Settings
Follow these steps to assign basic settings to the access point using the console port and a terminal emulator program:


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Step 1 Connect a RJ-45 to DB-9 serial cable (Cisco part number AIR-CONCAB1200 or refer to Appendix C, "Console Cable Pinouts") to the COM port on your computer and to the console port on the back of the access point.



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Note Both the Ethernet and console ports use RJ-45 connectors. Be careful to avoid accidently connecting the serial cable to the Ethernet port connector.


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Figure 3-4 shows the location of the access point's console port.

Figure 3-4 Connecting the Serial Cable





Step 2 Open your terminal emulator program.

Step 3 Enter these settings for the connection into your terminal emulator program:

•Bits per second (baud rate): 9600

•Data bits: 8

•Parity: No parity

•Stop bits: 1

•Flow control: Xon/Xoff or None

Step 4 Press = to display the home page of the access point.

If the access point is new and its factory configuration has not been changed, the Express Setup page appears. Go to Step 5.

If the access point has been configured, the Summary Status page appears. Perform the following additional steps:

a. Type s and the Setup screen appears.

b. Type ex and the Express Setup screen appears.

c. Go to Step 5.

Step 5 Type na to select System Name. Enter a system name for the access point and press Enter. A descriptive system name makes it easy to identify the access point on your network.

Step 6 Type t and then press Enter to select Terminal Type. To specify the type of console interface, perform one of the following steps:

a. Type t and then press Enter to select teletype display on the console interface.

b. Type a and then press Enter to select ANSI display on the console interface.

Step 7 Type pr and then press Enter to select Config Server Protocol. To select the type of protocol, perform one of the following steps:

•Type n to select none and press Enter after you make your selection.

•Type b to select BOOTP and press Enter after you make your selection.

•Type d to select DHCP and press Enter after you make your selection.

Step 8 Type ad and then press Enter to select IP Address. Enter an IP address for the access point.

•If DHCP or BOOTP is not enabled, your entry is the access point's static IP address.

•If DHCP or BOOTP is enabled, your entry provides the IP address only when the DHCP or BOOTP server does not respond.

Step 9 Type su and then press Enter to select IP Subnet Mask. Enter an IP subnet mask to identify the subnetwork so the access point's IP address can be recognized on the LAN.

•If DHCP or BOOTP is not enabled, your entry is the static subnet mask.

•If DHCP or BOOTP is enabled, your entry provides the subnet mask only when the DHCP or BOOTP server does not respond.

Step 10 Type g and then press Enter to select Default Gateway. Enter the IP address of your default gateway. The entry 255.255.255.255 indicates no gateway.

•If DHCP or BOOTP is not enabled, your entry is the static default gateway address.

•If DHCP or BOOTP is enabled, your entry provides the default gateway IP address only when a DHCP or BOOTP server does not respond.