Problem about failover with dynamic bootp client

[Xiao Lv]

I have two DHCP Server 4.2.3,  serve for two subnet (PC and IP Phone VLAN) and configured Failover feature.

But I get "no free leases" error.

Jan  4 21:21:02 DHCP-Server dhcpd: DHCPDISCOVER from 00:14:6a:e9:6f:06 via 10.51.32.199: network 10.51.32.192/27: no free leases
Jan  4 21:21:02 DHCP-Server dhcpd[14098]: DHCPDISCOVER from 00:14:6a:e9:6f:06 via 10.51.32.199: network 10.51.32.192/27: no free leases



This is my dhcpd.conf:

authoritative;
ddns-update-style interim;
ignore client-updates;
one-lease-per-client false;

failover peer "dhcp" {
        primary;
        address 10.51.64.197;
        port 520;
        peer address 10.51.64.15;
        peer port 519;
        max-response-delay 60;
        max-unacked-updates 10;
        mclt 600;
        split 128;
        load balance max seconds 3;
}
include "/etc/dhcp/dhcpd.master";


This is my dhcpd.master

option domain-name-servers 10.51.0.36, 10.51.0.37;
option tftp-server code 150 = IP-ADDRESS;

default-lease-time 28800;
max-lease-time 86400;

# PC VLAN
subnet 10.51.64.192 netmask 255.255.255.224 {
  option routers 10.51.64.202;
  option subnet-mask 255.255.255.224;
  option domain-name-servers 10.51.0.36, 10.51.0.37;
  pool {
    failover peer "dhcp";
    range 10.51.64.211 10.51.64.220;
  }
}

#IP Phone VLAN
subnet 10.51.32.192 netmask 255.255.255.224 {
  option broadcast-address 10.51.32.223;
  option routers 10.51.32.193;
  option tftp-server 10.51.32.194;
  pool {
    failover peer "dhcp";
    allow dynamic bootp clients;
    allow unknown-clients;
range 10.51.32.196 10.51.32.223;
}
}


Someone tell me failover can support dynamic bootp client after DHCPD 3.1.

Who can help me to resolve the problem?  or DHCPD 4.x still can't support dynamic bootp client with failover.

Thanks.



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