Offer in a dhcp fo setup with split 255

[Meike Stone]

Hello,

excuse me, that I ask again. Does nobody has had same issue or can
give me a hint?

Thanx in advance,
Meike


2011/10/28 Meike Stone <meike.stone at googlemail.com>:
> Hello,
>
> I've configured two dhcpd servers (dhcpd01 and dhcpd02) in a fail over
> association.
>
> The primary is connected directly in the client subnet. The secondary
> is reachable via dhcp relay (ip helper) from the client subnet.
> The primary should answer every time, if available. Therefor the split is 255.
>
> But after a DISCOVER from a client in the client subnet, both server
> answer immediately with a OFFER.
> Is this the correct behavior in a dhcp FO setup?
>
> Thanks for help
> Meike
>
>
> Here are the messages from the Logfile:
>
>
> dhcpd01 (primary DHCP FO, 192.168.140.44 )
> ===================================
> 2011-10-06T10:46:51+02:00 daemon (none) dhcpd[2530]: info DHCPDISCOVER
> from 00:0a:02:11:22:33 via eth1
> 2011-10-06T10:46:52+02:00 daemon (none) dhcpd[2530]: info DHCPOFFER on
> 192.168.140.223 to 00:0a:02:11:22:33 (dhcp-192-168-140-223) via eth1
> relay eth1 lease-duration 120
>
> dhcpd02 (secondary DHCP FO, 192.168.144.70)
> ===================================
> 2011-10-06T10:46:51+02:00 daemon (none) dhcpd[28725]: info
> DHCPDISCOVER from 00:0a:02:11:22:33 via 192.168.140.2
> 2011-10-06T10:46:52+02:00 daemon (none) dhcpd[28725]: info DHCPOFFER
> on 192.168.140.225 to 00:0a:02:11:22:33 (dhcp-192-168-140-225) via
> eth2 relay 192.168.140.2 lease-duration 120
>
>
>
> And here the configuration:
>
>
> dhcpd01 (primary DHCP FO, 192.168.140.44 )
> ===================================
> authoritative;
> default-lease-time 86400;
> min-lease-time 86400;
> max-lease-time 86400;
> ping-number 1;
> ping-timeout 1;
> log-facility daemon;
>
>
> failover peer "dhcp-failover"
> {
>  primary;
>  address 192.168.140.44;
>  port 647;
>
>  peer address 192.168.144.70;
>  peer port 647;
>
>  max-response-delay 60;
>  max-unacked-updates 10;
>  mclt 3600;
>  split 255;
>  load balance max seconds 3;
> }
>
> class "pxe-boot" {
>        match if (substring ( option  vendor-class-identifier, 0, 9) =
> "PXEClient") or (option  dhcp-client-identifier = "null");
>        default-lease-time 60;
>        min-lease-time 60;
>        max-lease-time 60;
> }
>
> subnet 192.168.140.0 netmask 255.255.255.0 {
>        option routers 192.168.140.1;
>
>        pool {
>                failover peer "dhcp-failover";
>                deny dynamic bootp clients;
>                range 192.168.140.80 192.168.140.220;
>                deny members of "pxe-boot";
>        }
>        pool {
>                failover peer "dhcp-failover";
>                deny dynamic bootp clients;
>                range 192.168.140.221 192.168.140.229;
>                allow members of "pxe-boot";
>        }
> }
>
>
>
> dhcpd02 (secondary DHCP FO, 192.168.144.70)
> ===================================
>
> authoritative;
> default-lease-time 86400;
> min-lease-time 86400;
> max-lease-time 86400;
> ping-number 1;
> ping-timeout 1;
> log-facility daemon;
>
>
> failover peer "dhcp-failover"
> {
>  secondary;
>  address 192.168.144.70;
>  port 647;
>
>  peer address 192.168.140.44;
>  peer port 647;
>
>  max-response-delay 60;
>  max-unacked-updates 10;
>  load balance max seconds 3;
> }
>
>
>
> class "pxe-boot" {
>        match if (substring ( option  vendor-class-identifier, 0, 9) =
> "PXEClient") or (option  dhcp-client-identifier = "null");
>        default-lease-time 60;
>        min-lease-time 60;
>        max-lease-time 60;
> }
>
> subnet 192.168.140.0 netmask 255.255.255.0 {
>    option routers 192.168.140.1;
>
>        pool {
>                failover peer "dhcp-failover";
>                deny dynamic bootp clients;
>                range 192.168.140.80 192.168.140.220;
>                deny members of "pxe-boot";
>        }
>        pool {
>                failover peer "dhcp-failover";
>                deny dynamic bootp clients;
>                range 192.168.140.221 192.168.140.229;
>                allow members of "pxe-boot";
>        }
> }
>