failover

[Billy Cook]

Hi,
I'm trying to get failover to work but can't get only one server to
respond to requests.  I have two servers configured and one client in
my test network.  The first time the client asks for a lease only one
server responds and the other has a message in syslog saying that the
peer owns the lease.

Jun 21 14:32:12 dhcp1 dhcpd: uid lease 192.168.254.25 for client
00:06:5b:c4:b3:16 is duplicate on BOBO
Jun 21 14:32:12 dhcp1 dhcpd: DHCPREQUEST for 192.168.254.26
(192.168.254.11) from 00:06:5b:c4:b3:16 via eth0: lease owned by peer

After I do an ifdown eth1 and ifup eth1 on the client both servers
start replying to the client's dhcp requests.  Do my configs look
correct?

Thanks,
Billy Cook

Here are my config files:

-----------primary server's dhcpd.conf
------------------------------------------
# Global Settings

        authoritative;
        pid-file-name "/var/run/dhcpd.pid";
        one-lease-per-client on;
        ping-check on;
        ddns-update-style none;
        ddns-updates off;
        deny bootp;
        default-lease-time 120;
        max-lease-time 120;


failover peer "dhcp1" {
        primary;
        address 192.168.254.10;
        port 847;
        peer address 192.168.254.11;
        peer port 647;
        max-response-delay 180;
        mclt 30;
        #hba ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:
        #    ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff;
        split 128;
        load balance max seconds 5;
        }


#$ test net

          shared-network BOBO {
               option domain-name-servers 130.127.8.8, 130.127.28.14;
               option subnet-mask 255.255.255.0;

               subnet 192.168.254.0 netmask 255.255.255.0 {
                   option routers 192.168.254.1;
                   option subnet-mask 255.255.255.0;
                   pool {
                        allow unknown clients;
                        range 192.168.254.20 192.168.254.30;
                        failover peer "dhcp1";
                        deny dynamic bootp clients;
                        }
               }
          }

-------------- secondary server's dhcpd.conf -----------------------------
# Global Settings

        authoritative;
        pid-file-name "/var/run/dhcpd.pid";
        one-lease-per-client on;
        ping-check on;
        ddns-update-style none;
        ddns-updates off;
        deny bootp;
        default-lease-time 120;
        max-lease-time 120;

failover peer "dhcp2" {
        secondary;
        address 192.168.254.11;
        port 647;
        peer address 192.168.254.10;
        peer port 847;
        max-response-delay 180;
        load balance max seconds 5;
        mclt 30;
        }


#$ test net

          shared-network BOBO {
               option domain-name-servers 130.127.8.8, 130.127.28.14;
               option subnet-mask 255.255.255.0;
               subnet 192.168.254.0 netmask 255.255.255.0 {
                   option routers 192.168.254.1;
                   option subnet-mask 255.255.255.0;
                   pool {
                        allow unknown clients;
                        range 192.168.254.20 192.168.254.30;
                        failover peer "dhcp2";
                        deny dynamic bootp clients;
                        }
               }
          }