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How To Configure an AP to Find the IdentiFi Wireless Controller with DHCP Option 78 on a Windows Server 2003

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TitleHow To Configure an AP to Find the IdentiFi Wireless Controller with DHCP Option 78 on a Windows Server 2003
Objective
How To Configure an AP to Find the IdentiFi Wireless Controller with DHCP Option 78 on a Windows Server
Environment
  • ExtremeWireless
  • All Access Points
  • All Firmware
  • DHCP Server
  • DHCP option 78
  • Windows 
Procedure
You must enable 078 SLP DA Option for every scope you define. A scope is a collection of IP addresses meant to be distributed by the DHCP server to the client devices on a subnet. The SLP DA is used by:
  • The Wireless APs to discover the IdentiFi Wireless Appliance.
  • The mobility agents to discover the mobility manager.
  1. To configure DHCP on Windows 2003 server
  2. Click Start, point to Administrative Tool, and then click DHCP
  3. Right-click the server node, and then click Set predefined options.
  4. Click Add, and then type a name for the option, for example "IdentiFi Controllers".
  5. Set the data type to Byte, and then click to select the Array check box.
  6. In the Code box, type 78.
  7. Type a description for the option, for example "IdentiFi Controllers"
  8. Click ok
  9. Click on Edit Array
  10. In the Mandatory box, type 1, and then click Add. 
  11. For example, for the addresses 192.168.1.2, type 192, click Add, type 168, click Add, type 1, click Add, type 2, click Add, and so on if another controller is needed. The Byte array list then looks like the following:
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  1. In the console tree, right-click the DHCP server on which you want to create the new DHCP scope, and then click New Scope.
  2. Click Next. The Scope Name window is displayed.
  3. In the Name and Description text boxes, type the scope name and description. This can be any name that you want, but it should be descriptive enough so that you can identify the purpose of the scope on your network.
  4. Click Next. The IP Address Range window is displayed.
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  1. In the Start IP address and the End IP address text boxes, type the start and end of the IP address range that you want to be distributed to the network.  
  2. In the Length text box, type the numeric value of the subnet mask bits, or in the Subnet mask text box, type the subnet mask IP address. A subnet mask defines how many bits of an IP address to use for the network/subnet IDs and how many bits to use for the host ID. You can specify the subnet mask by length or as an IP address. You must use the Length (or the Subnet mask) provided by your network administrator.
  3. Click Next. The Add Exclusions window is displayed.
  4. In the Start IP address and the End IP address text boxes, type the start and end of the IP address range that you want to exclude from the distribution.You must use the exclusion range provided by your network administrator.
  5. Click Next. The Lease Duration window is displayed. The DHCP server assigns a client an IP address for a given amount of time. The amount of time for which the IP address can be leased is defined in the Lease Duration window.
  6. In the Days, Hours and Minutes text box, type the lease duration. You must use the Lease Duration as specified by your network administrator
  7. Click Next. The Configure DHCP Options window is displayed.
  8. Select Yes, I want to configure these options now, and then click Next. The Router (Default Gateway) window is displayed.
  9. In the IP address text box, type the network’s default gateway. You must use the default gateway provided by your network administrator.
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  1. Click Next. The Domain Name and DNS Servers window is displayed.
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  1. In the Parent domain text box, type your company’s domain name. You must use the Parent Domain provided by your network administrator.
  2. In the Server name text box, type your server name. You must use the Server name provided by your network administrator.
  3. In the IP address text box, type your server’s IP address, and click Add.
  4. Click Next. The WINS Servers window is displayed.
  5. Click Next. The Activate Scope window is displayed.
  6. Select Yes, I want to activate this scope now, and click Next. The wizard displays the following message: This server is now a DHCP server. 
  7. Click Start, point to Administrative Tool, and then click DHCP. The DHCP console tree is displayed.
  8. Select the scope you configured, and right-click.
  9. Select Configure Options. The Server Options window is displayed.
  10. Enable 078 IdentiFi Controllers.
  11. Click Apply, and then click OK.
Note: If there is no SLP deployment on the enterprise network, the IdentiFi Wireless Appliance is configured to act as a DA by default. If you put the IdentiFi Wireless Appliance’s IP address(es) in a DHCP server for Option 78, Wireless APs will interact with the IdentiFi Wireless Appliance for discovery. Similarly, the mobility agents also interact with the IdentiFi Wireless Appliance to discover the mobility manager.


 
Additional notes
Access points failing the IdentiFi Controller discovery process

To add a second controller repeat step 11 using it's IP address

For newer Windows Server versions please see the following article - How To Configure an AP to Find the ExtremeWireless Controller with DHCP Option 78 on a Windows Server

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