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

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TitleHow To Configure an AP to Find the IdentiFi Wireless Controller with DHCP Option 78 on a Linux Server
Objective
How To Configure an AP to Find the IdentiFi Wireless Controller with DHCP Option 78 on a Linux Server
Environment
  • IdentiFi
  • All Access Points
  • All Firmware
  • DHCP Server
  • DHCP option 78
  • Linux
Procedure
You can configure a DHCP server using the configuration file /etc/dhcpd.conf. DHCP also uses the file /var/lib/dhcp/dhcpd.leases to store the client lease database.
  1. The first step in configuring a DHCP server is to create the configuration file that stores the network information for the clients. Global options can be declared for all clients, or options can be declared for each client system. The configuration file can contain any extra tabs or blank lines for easier formatting. The keywords are not case-sensitive and lines beginning with a hash mark (#) are considered comments. To use the recommended mode, add the following line to the top of the configuration file: ddns-update-style interim; Read the dhcpd.conf man page for details about the different modes.
  2. There are two types of statements in the configuration file:
  • Parameters – State how to perform a task, whether to perform a task or what networking configuration options to use to send to the client.
  • Declarations – Describe the Topology of the network, describe the clients, provide addresses for the clients, or apply a group of parameters to a group of declarations.
  1. Some parameters must start with the option keyword and are referred to as options. Options configure DHCP options; whereas, parameters configure values that are not optional or control how the DHCP server behaves. Parameters (including options) declared before a section enclosed in curly brackets {} are considered global parameters. Global parameters apply to all the sections below it.
  2. For Wireless AP Subnet:
subnet 10.209.0.0 netmask 255.255.255.0 {
option routers 10.209.0.2; ### This is the network’s default gateway address.
option subnet-mask 255.255.255.0
option domain-name xyznetworks.ca
option domain-name servers 192.168.1.3, 207.236, 176.11
range 10.209.0.3 10.209.0.40;
default-lease-time 7200000 ###The figures are in seconds.
option slp-directory-agent true 10.209.0.1, 10.209.0.3; ####The Wireless APs
use the SLP DA to discover the IdentiFi Wireless Appliance, and the mobility
agents use it to discover the mobility manager.
authoritative;
If you change the configuration file, the changes will not take effect until you restart the DHCP daemon with the command service dhcpd restart.
  1. For VNS Subnets (on the IdentiFi Wireless Appliance It Is Configured as Use DHCP Relay)
subnet 172.29.31.0 netmask 255.255.255.224
option routers 172.29.31.1; #### This is the VNS 1 gateway.
option subnet-mask 255. 255. 255.0
option domain-name toronto.xyznetworks.com”;
option domain-name-servers 192.1.1.3;
range 172.29.31.2 172.29.31.30;
default-lease-time 36000;
}
subnet 172.29.2.0 netmask 255.255.255.224
option routers 172.29.2.1; #### This is the VNS 2 gateway.
option subnet-mask 255. 255. 255.0
option domain-name toronto.xyznetworks.com”;
option domain-name-servers 192.1.1.3;
range 172.29.2.2 172.29.2.30;
default-lease-time 36000;
}

 If you change the configuration file, the changes will not take effect until you restart the DHCP daemon with the command service dhcpd restart.
 
Additional notes
Manual Configuring DHCP, DNS, and IAS Services - (requires Extranet log in)

Access points failing the IdentiFi Controller discovery process

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