DHCP failover in Linux

- Primary Server

vi /etc/dhcp/dhcpd.failover

# Failover specific configurations

failover peer “dhcp” {

primary;

address 192.168.10.1;

port 647;

peer address 192.168.10.2;

peer port 647;

max-response-delay 60;

max-unacked-updates 10;

mclt 600;

split 128;

load balance max seconds 3;

}

- Secondary Server

vi /etc/dhcp/dhcpd.failover

failover peer “dhcp” {

secondary;

address 192.168.10.2;

port 647;

peer address 192.168.10.1;

peer port 647;

max-response-delay 60;

max-unacked-updates 10;

load balance max seconds 3;

}

- 두 서버 모두

# vi /etc/dhcp/dhcpd.conf 

include “/etc/dhcp/dhcpd.failover”;

 

network 192.168.10.0 netmask 255.255.0.0 {

option routers 192.168.10.254;

option subnet-mask 255.255.0.0;

option broadcast-address 192.168.10.5.255;

pool {

failover peer “dhcp”;

range 192.168.10.100 192.168.10.4.254;

}

}

# systemctl restart dhcpd (

http://blog.whatgeek.com.pt/2012/03/dhcp-failover-load-balancing-and-synchronization-centos-6/

https://kb.isc.org/article/AA-00502/0/A-Basic-Guide-to-Configuring-DHCP-Failover.html