problem with failover server selection

[Ana Gallardo Gómez]

Hello Glenn,

It is quite normal for primary and secondary servers to respond to a
> dhcpdiscover. It is up to the client to choose which response to accept. For
> example the client might choose the address that it has had before, or
> perhaps just take the first reply.
>

As I understand, the split statement whith DHC load balancing algorithm are
used to determine what server respond to one DHCPDISCOVER package:

The different addresses offered by primary and secondary is also normal. The
> two servers divide up the available addresses between them, and offer an
> address from their pool of addresses.
>

I think that the normal behavior is:

LOG PRIMARY:
Mar 15 20:10:13  dhcpd: DHCPDISCOVER from 00:1e:65:05:78:36 via vlan1223:
load balance to peer failover-open
Mar 15 20:10:13  dhcpd: DHCPREQUEST for 10.253.40.246 (10.253.40.1) from
00:1e:65:05:78:36 via vlan1223: lease owned by peer
Mar 15 20:10:22  dhcpd: DHCPACK to 10.253.40.246 (00:1e:65:05:78:36) via
vlan1223
Mar 15 21:00:57  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
via vlan1223
Mar 15 21:00:57  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:02:29  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:02:29  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:21:43  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:21:43  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223


LOG SECONDARY:

Mar 15 20:10:15  dhcpd: DHCPDISCOVER from 00:1e:65:05:78:36 via vlan1223
Mar 15 20:10:16  dhcpd: DHCPOFFER on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 20:10:16  dhcpd: DHCPREQUEST for 10.253.40.246 (10.253.40.1) from
00:1e:65:05:78:36 (Miguel) via vlan1223
Mar 15 20:10:16  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 20:10:25  dhcpd: DHCPACK to 10.253.40.246 (00:1e:65:05:78:36) via
vlan1223
Mar 15 20:40:21  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 20:40:21  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:01:00  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:01:00  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:02:31  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:02:31  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:02:32  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:02:32  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:21:45  dhcpd: DHCPREQUEST for 10.253.40.246 from 00:1e:65:05:78:36
(Miguel) via vlan1223
Mar 15 21:21:45  dhcpd: DHCPACK on 10.253.40.246 to 00:1e:65:05:78:36
(Miguel) via vlan1223


> There's a somewhat long and detailed discussion in the dhcpd.conf man page.
>


I can't find that information. Can you tell me more explicitly where can I
found the discusion?


Thank you very much for your response.

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:: Ana Gallardo Gómez ::
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