ExtremeCloud IQ Controller Deployment Guide

Configure the Linux DHCP server to include DNS information. In the /etc/dhcp.conf file, add domain-name-servers and domain-name DHCP options.

subnet 10.2.221.0 netmask 255.255.255.0 {
range 10.2.221.30 10.2.221.130;

option slp-directory-agent true 10.2.221.2;
option subnet-mask 255.255.255.0;
option domain-name-servers 192.168.6.2;
option domain-name "Availability-221.com";
option routers 10.2.221.1;
default-lease-time 40000;
}

Configure the Linux DNS server to include ExtremeCloud IQ Controller IP addresses.

Create a file for the domain name configured in dhcp.conf (in this example, "Availability-221.com") as follows at /var/named/chroot/var/named.

The name of the file should be the following: /var/named/chroot/var/named/named.Availability-221.com

/var/named/chroot/var/named/named.Availability-221.com
$TTL 86400
@     IN    SOA   ns1.availability-221.com.     hostmaster.availability-221.com.    (
                            2      ; serial #
                            28800   ; refresh
                            14400   ; retry
                            3600000 ; expire
                            86400   ; ttl
                            )
                IN    NS    ns1.availability-221.com.     
Controller      IN    A     10.2.221.2

Add the domain name to the DNS configuration file (/var/named/chroot/etc/named.conf).

$// 
// a caching only nameserver config
// 
options { 
/*
 * If there is a firewall between you and nameservers you want
 * to talk to, you might need to uncomment the query-source
 * directive below.  Previous versions of BIND always asked
 * questions using port 53, but BIND 8.1 uses an unprivileged
 * port by default.
 */
// query-source address * port 53;
version "Bind";
recursion no;
directory "/var/named";
};
zone "Availability-221.com" {
       type master;
       file "named.Availability-221.com";
};
zone "0.0.127.in-addr.arpa" { 
type master;
file "named.local";
allow-update { none; };

Confirm that DNS service is running.

ps -ef | grep named
named 10023 1 0 Feb18 ? 00:00:00 /usr/sbin/named -u named -t /var/named/chroot
root 7687 7531 0 22:14 pts/982 00:00:00 grep named

Verify that the domain name is configured properly.

nslookup Controller.Availability-221.com
Server:            127.0.0.1
Address:           127.0.0.1#53

Name:  Controller.Availability-221.com
Address: 10.2.221.2

Configuring DNS on a Linux Server